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Department of Water and Environmental Regulation HYDAY V146 Output 14/05/2026
Site 701009 Irwin River - Mountain Bridge Year 1982
VarFrom 10.00 Stage - SL in Metres Table Type Total
VarTo 151.00 Stream Discharge Volume in Megalitres
Figures are for period ending 24:00
Day Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec Day
1 [ ] [ ] [ ] [ ] [ ] [ ] [ ] [ ] [ ] [ ] [ ] [ ] 1
2 [ ] [ ] [ ] [ ] [ ] [ ] [ ] [ ] [ ] [ ] [ ] [ ] 2
3 [ ] [ ] [ ] [ ] [ ] [ ] [ ] [ ] [ ] [ ] [ ] [ ] 3
4 [ ] [ ] [ ] [ ] [ ] [ ] [ ] [ ] [ ] [ ] [ ] [ ] 4
5 [ ] [ ] [ ] [ ] [ ] [ ] [ ] [ ] [ ] [ ] [ ] [ ] 5
6 [ ] [ ] [ ] [ ] [ ] [ ] [ ] [ ] [ ] [ ] [ ] [ ] 6
7 [ ] [ ] [ ] [ ] [ ] [ ] [ ] [ ] [ ] [ ] [ ] [ ] 7
8 [ ] [ ] [ ] [ ] [ ] [ ] [ ] [ ] [ ] [ ] [ ] [ ] 8
9 [ ] [ ] [ ] [ ] [ ] [ ] [ ] [ ] [ ] [ ] [ ] 4.895" 9
10 [ ] [ ] [ ] [ ] [ ] [ ] [ ] [ ] [ ] [ ] [ ] 5.376" 10
11 [ ] [ ] [ ] [ ] [ ] [ ] [ ] [ ] [ ] [ ] [ ] 5.254" 11
12 [ ] [ ] [ ] [ ] [ ] [ ] [ ] [ ] [ ] [ ] [ ] 4.905" 12
13 [ ] [ ] [ ] [ ] [ ] [ ] [ ] [ ] [ ] [ ] [ ] 4.779" 13
14 [ ] [ ] [ ] [ ] [ ] [ ] [ ] [ ] [ ] [ ] [ ] 5.002" 14
15 [ ] [ ] [ ] [ ] [ ] [ ] [ ] [ ] [ ] [ ] [ ] 5.099" 15
16 [ ] [ ] [ ] [ ] [ ] [ ] [ ] [ ] [ ] [ ] [ ] 5.135" 16
17 [ ] [ ] [ ] [ ] [ ] [ ] [ ] [ ] [ ] [ ] [ ] 5.367" 17
18 [ ] [ ] [ ] [ ] [ ] [ ] [ ] [ ] [ ] [ ] [ ] 4.708" 18
19 [ ] [ ] [ ] [ ] [ ] [ ] [ ] [ ] [ ] [ ] [ ] 4.582" 19
20 [ ] [ ] [ ] [ ] [ ] [ ] [ ] [ ] [ ] [ ] [ ] 4.982" 20
21 [ ] [ ] [ ] [ ] [ ] [ ] [ ] [ ] [ ] [ ] [ ] 5.496" 21
22 [ ] [ ] [ ] [ ] [ ] [ ] [ ] [ ] [ ] [ ] [ ] 6.189" 22
23 [ ] [ ] [ ] [ ] [ ] [ ] [ ] [ ] [ ] [ ] [ ] 5.289" 23
24 [ ] [ ] [ ] [ ] [ ] [ ] [ ] [ ] [ ] [ ] [ ] 5.424" 24
25 [ ] [ ] [ ] [ ] [ ] [ ] [ ] [ ] [ ] [ ] [ ] 5.849" 25
26 [ ] [ ] [ ] [ ] [ ] [ ] [ ] [ ] [ ] [ ] [ ] 5.118" 26
27 [ ] [ ] [ ] [ ] [ ] [ ] [ ] [ ] [ ] [ ] [ ] 5.047" 27
28 [ ] [ ] [ ] [ ] [ ] [ ] [ ] [ ] [ ] [ ] [ ] 5.109" 28
29 [ ] [ ] [ ] [ ] [ ] [ ] [ ] [ ] [ ] [ ] 4.786" 29
30 [ ] [ ] [ ] [ ] [ ] [ ] [ ] [ ] [ ] [ ] 4.460" 30
31 [ ] [ ] [ ] [ ] [ ] [ ] 4.513" 31
Mean [ ] [ ] [ ] [ ] [ ] [ ] [ ] [ ] [ ] [ ] [ ] 5.103"
Median [ ] [ ] [ ] [ ] [ ] [ ] [ ] [ ] [ ] [ ] [ ] 5.099"
Maximum [ ] [ ] [ ] [ ] [ ] [ ] [ ] [ ] [ ] [ ] [ ] 6.189"
Minimum [ ] [ ] [ ] [ ] [ ] [ ] [ ] [ ] [ ] [ ] [ ] 4.460"
Total [ ] [ ] [ ] [ ] [ ] [ ] [ ] [ ] [ ] [ ] [ ] 117.4 "
Missing Days 31 28 31 30 31 30 31 31 30 31 30 8
Summaries ------------------ Notes -------------------
--------- All recorded data is continuous and reliable
except where the following tags are used...
Annual Mean 5.103" " ... Relative Uncertainty +/-10%
Ann. Median 5.099" [ ... Not Available
Annual Total 117.4 "
Missing Days 342
Maximum Minimum
Daily 6.189" 4.460"
Department of Water and Environmental Regulation HYDAY V146 Output 14/05/2026
Site 701009 Irwin River - Mountain Bridge Year 1983
VarFrom 10.00 Stage - SL in Metres Table Type Total
VarTo 151.00 Stream Discharge Volume in Megalitres
Figures are for period ending 24:00
Day Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec Day
1 4.413" 3.875" 2.870" 6.003" 6.265" 8.679" 184.6 " 52.43 " 58.61 " 11.46 " 5.508" 23.25 " 1
2 3.972" 3.456" 3.178" 5.854" 7.012" 24.57 " 104.4 " 42.91 " 57.41 " 10.78 " 5.892" 9.346" 2
3 3.345" 3.813" 4.222" 5.927" 14.26 " 20.40 " 252.4 " 45.46 " 240.5 " 9.871" 6.280" 7.957" 3
4 3.984" 4.998" 4.777" 5.618" 10.68 " 10.65 " 128.9 " 34.34 " 190.6 " 9.344" 6.451" 12.37 " 4
5 4.588" 5.429" 4.690" 5.752" 7.834" 9.481" 61.02 " 35.76 " 255.7 " 9.101" 7.080" 24.92 " 5
6 3.392" 5.802" 4.582" 6.525" 8.572" 9.123" 29.99 " 28.48 " 184.6 " 8.969" 7.904" 58.32 " 6
7 3.083" 5.761" 4.269" 6.882" 9.099" 8.734" 19.08 " 23.35 " 284.5 " 9.026" 8.352" 21.25 " 7
8 3.230" 5.218" 3.925" 6.892" 7.643" 8.594" 101.7 " 19.83 " 210.9 " 8.939" 6.894" 8.877" 8
9 3.088" 4.665" 2.932" 6.253" 7.525" 8.534"1015 " 17.89 " 109.3 " 8.852" 6.031" 7.883" 9
10 2.456" 4.597" 3.736" 5.832" 7.254" 8.408" 538.9 " 17.04 " 64.02 " 8.039" 5.860" 7.388" 10
11 1.874" 4.530" 4.333" 5.133" 7.458" 8.346" 211.4 " 15.77 " 43.93 " 8.326" 6.469" 6.983" 11
12 1.860" 4.490" 4.691" 4.820" 7.526" 8.265" 118.5 " 16.98 " 40.67 " 8.525" 8.328" 6.686" 12
13 1.783" 4.601" 4.144" 4.928" 7.419" 8.107" 100.2 " 19.12 " 40.32 " 8.788" 7.593" 6.499" 13
14 1.837" 4.842" 3.332" 5.288" 7.267" 8.037" 67.50 " 24.60 " 49.44 " 8.355" 6.759" 6.284" 14
15 1.863" 5.156" 3.364" 5.156" 7.502" 7.805" 40.00 " 19.36 " 45.40 " 7.803" 6.684" 5.627" 15
16 1.863" 5.124" 4.296" 5.618" 7.664" 8.210" 27.67 " 17.56 " 34.01 " 8.232" 23.55 " 6.367" 16
17 2.700" 4.641" 4.641" 6.336" 7.586" 26.46 " 21.33 " 15.98 " 22.34 " 8.322" 17.85 " 6.472" 17
18 3.477" 4.541" 5.032" 6.566" 7.628" 521.3 " 16.90 " 15.05 " 18.63 " 7.733" 9.611" 6.471" 18
19 3.636" 4.739" 4.598" 6.786" 7.585" 664.4 " 14.91 " 13.72 " 16.10 " 7.114" 8.864" 6.160" 19
20 4.021" 4.948" 3.930" 7.068" 7.339" 343.0 " 14.23 " 26.75 " 14.71 " 6.603" 7.802" 5.845" 20
21 4.414" 4.741" 3.852" 7.083" 7.149" 176.4 " 13.46 " 96.77 " 13.83 " 7.024" 7.225" 5.682" 21
22 4.548" 4.319" 3.692" 6.649" 7.231" 109.6 " 12.79 " 123.0 " 13.10 " 7.421" 7.002" 5.418" 22
23 3.943" 4.077" 3.422" 6.017" 7.077" 56.20 " 12.44 " 101.2 " 11.90 " 7.368" 6.842" 6.118" 23
24 4.102" 4.469" 3.521" 6.510" 6.863" 37.26 " 91.69 "1008 " 11.04 " 6.943" 5.896" 6.290" 24
25 3.951" 4.753" 3.566" 6.624" 7.469" 44.56 " 329.0 " 662.5 " 10.67 " 6.510" 4.645" 6.524" 25
26 3.419" 4.987" 3.589" 6.462" 7.482" 102.2 "1103 " 298.8 " 10.74 " 8.161" 5.064" 5.993" 26
27 3.188" 4.599" 3.746" 6.831" 8.922" 109.7 " 547.3 " 157.8 " 11.66 " 8.883" 5.879" 5.714" 27
28 3.032" 3.581" 4.389" 8.699" 9.346" 176.8 " 260.3 " 98.27 " 10.78 " 6.612" 6.007" 11.08 " 28
29 3.789" 4.756" 8.741" 8.002" 553.7 " 143.1 " 78.37 " 10.05 " 6.507" 5.597" 123.4 " 29
30 4.473" 5.492" 6.708" 7.796" 353.0 " 94.20 " 89.41 " 10.31 " 6.339" 31.26 " 30.53 " 30
31 4.466" 5.754" 7.525" 67.28 " 75.34 " 5.393" 14.14 " 31
Mean 3.348" 4.670" 4.107" 6.319" 7.935" 114.7 " 185.3 " 106.2 " 69.86 " 8.108" 8.506" 15.03 "
Median 3.419" 4.653" 4.144" 6.399" 7.525" 22.49 " 94.20 " 34.34 " 37.17 " 8.232" 6.800" 6.686"
Maximum 4.588" 5.802" 5.754" 8.741" 14.26 " 664.4 "1103 "1008 " 284.5 " 11.46 " 31.26 " 123.4 "
Minimum 1.783" 3.456" 2.870" 4.820" 6.265" 7.805" 12.44 " 13.72 " 10.05 " 5.393" 4.645" 5.418"
Total 103.8 " 130.8 " 127.3 " 189.6 " 246.0 "3440 "5743 "3291 "2096 " 251.3 " 255.2 " 465.8 "
Summaries ------------------ Notes -------------------
--------- All recorded data is continuous and reliable
except where the following tags are used...
Annual Mean 44.77 " " ... Relative Uncertainty +/-10%
Ann. Median 7.525"
Annual Total 16340 "
Maximum Minimum
Daily 1103 " 1.783"
Department of Water and Environmental Regulation HYDAY V146 Output 14/05/2026
Site 701009 Irwin River - Mountain Bridge Year 1984
VarFrom 10.00 Stage - SL in Metres Table Type Total
VarTo 151.00 Stream Discharge Volume in Megalitres
Figures are for period ending 24:00
Day Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec Day
1 7.770" 8.013" 2.850" 7.890" 288.3 # 253.4 " 16.96 " 13.57 " 11.58 " 12.13 " 8.712" 7.197" 1
2 6.590" 6.886" 3.533" 7.537" 72.77 " 193.0 " 14.71 " 21.00 " 12.28 " 12.23 " 8.647" 7.236" 2
3 6.053" 5.750" 11.90 " 7.047" 27.67 " 144.1 " 23.89 " 47.46 " 12.80 " 11.08 " 8.534" 7.250" 3
4 5.817" 4.345" 123.8 " 6.402" 15.22 " 106.9 " 54.70 " 140.7 " 12.31 " 10.46 " 8.292" 8.449" 4
5 5.802" 4.700" 706.1 " 5.434" 14.02 " 88.58 " 209.2 " 102.2 " 21.73 " 10.07 " 9.859" 7.128" 5
6 5.341" 4.364" 237.9 " 5.103" 25.78 " 94.04 " 330.4 " 69.16 " 17.95 " 10.38 " 9.463" 7.185" 6
7 4.921" 3.635" 100.9 " 5.251"1080 # 103.0 " 300.1 " 81.47 " 13.02 " 13.91 " 8.944" 7.038" 7
8 5.230" 3.595" 134.4 " 5.853"1876 # 66.63 " 192.2 " 107.2 " 12.64 " 17.18 " 15.08 " 6.798" 8
9 5.281" 3.344" 174.6 " 5.679"1720 # 48.82 " 138.5 " 92.97 " 16.44 " 10.79 " 17.59 " 6.951" 9
10 4.776" 2.400" 86.47 " 6.012" 815.5 # 39.41 " 92.96 " 63.52 " 14.82 " 9.785" 9.550" 7.243" 10
11 5.269" 1.887" 30.41 " 17.13 " 361.4 " 34.65 " 60.63 " 42.99 " 11.51 " 9.518" 8.283" 7.304" 11
12 5.243" 1.867" 13.93 " 90.15 " 207.9 " 31.44 " 41.46 " 31.34 " 11.13 " 9.892" 7.527" 7.454" 12
13 5.213" 2.429" 9.595"1601 # 127.5 " 29.57 " 31.37 " 23.68 " 11.18 " 9.916" 7.077" 7.043" 13
14 5.173" 2.733" 8.514" 636.3 # 82.38 " 28.87 " 25.21 " 19.21 " 48.16 " 9.385" 6.313" 7.355" 14
15 4.751" 2.610" 8.721" 195.7 " 53.09 " 26.10 " 22.87 " 21.30 " 61.58 " 9.236" 7.020" 7.025" 15
16 4.493" 2.952" 9.177" 86.81 " 38.04 " 24.74 " 21.54 " 21.57 " 141.7 " 8.754" 12.34 " 6.808" 16
17 3.673" 3.167" 7.981" 41.73 " 36.45 " 22.41 " 19.13 " 16.04 " 46.05 " 8.492" 10.35 " 6.668" 17
18 3.456" 2.792" 7.438" 23.81 " 33.28 " 20.09 " 18.22 " 19.73 " 22.66 " 8.204" 8.514" 6.525" 18
19 3.074" 3.152" 7.528" 16.16 " 63.02 " 18.03 " 17.27 " 18.06 " 15.96 " 7.608" 7.857" 6.205" 19
20 2.798" 3.200" 7.564" 12.96 "2040 # 16.24 " 16.26 " 14.51 " 12.93 " 8.313" 7.638" 6.118" 20
21 2.974" 11.83 " 7.554" 13.64 "3644 # 33.63 " 14.88 " 16.00 " 11.30 " 8.916" 6.904" 6.249" 21
22 3.912" 19.37 " 7.457" 13.76 "1023 # 40.75 " 14.14 " 14.23 " 10.84 " 8.721" 5.634" 6.398" 22
23 4.577" 11.18 " 7.521" 10.86 " 389.8 " 132.2 " 13.71 " 13.72 " 10.81 " 9.005" 6.280" 6.301" 23
24 4.169" 6.484" 6.895" 9.960" 241.1 " 119.8 " 13.11 " 12.84 " 10.36 " 8.994" 7.398" 5.903" 24
25 3.889" 4.970" 6.382" 9.703" 175.0 " 78.73 " 12.51 " 12.49 " 10.19 " 8.722" 7.646" 5.940" 25
26 3.860" 5.392" 6.760" 9.734"2570 # 50.00 " 21.11 " 12.40 " 10.36 " 8.494" 7.413" 6.139" 26
27 3.762" 4.525" 6.899" 9.244"3051 # 35.34 " 20.10 " 12.50 " 10.98 " 8.280" 6.876" 7.448" 27
28 128.3 " 3.401" 6.909" 8.969"4717 # 28.40 " 15.54 " 12.49 " 11.56 " 8.199" 6.790" 9.143" 28
29 201.5 " 2.851" 7.303" 11.72 "1263 # 23.25 " 16.86 " 13.63 " 11.46 " 8.100" 7.006" 6.548" 29
30 55.86 " 7.527" 103.3 # 629.4 " 19.83 " 15.12 " 13.53 " 10.90 " 9.142" 7.211" 5.783" 30
31 14.31 " 7.659" 362.7 " 13.56 " 11.54 " 8.877" 5.585" 31
Mean 17.03 " 4.960" 57.16 " 99.51 # 872.4 # 65.07 " 58.65 " 35.90 " 21.24 " 9.767" 8.558" 6.852"
Median 5.173" 3.595" 7.659" 10.41 # 288.3 # 37.38 " 20.10 " 19.21 " 12.29 " 9.142" 7.751" 6.951"
Maximum 201.5 " 19.37 " 706.1 "1601 #4717 # 253.4 " 330.4 " 140.7 " 141.7 " 17.18 " 17.59 " 9.143"
Minimum 2.798" 1.867" 2.850" 5.103# 14.02 # 16.24 " 12.51 " 11.54 " 10.19 " 7.608" 5.634" 5.585"
Total 527.8 " 143.8 " 1772 " 2985 #27045 # 1952 " 1818 " 1113 " 637.2 " 302.8 " 256.7 " 212.4 "
Summaries ------------------ Notes -------------------
--------- All recorded data is continuous and reliable
except where the following tags are used...
Annual Mean 105.9 # " ... Relative Uncertainty +/-10%
Ann. Median 11.16 # # ... Relative Uncertainty +/-15%
Annual Total 38766 #
Maximum Minimum
Daily 4717 # 1.867#
Department of Water and Environmental Regulation HYDAY V146 Output 14/05/2026
Site 701009 Irwin River - Mountain Bridge Year 1985
VarFrom 10.00 Stage - SL in Metres Table Type Total
VarTo 151.00 Stream Discharge Volume in Megalitres
Figures are for period ending 24:00
Day Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec Day
1 5.241" 6.833" 4.690" 5.828" 7.622" 8.949" 15.61 " 13.37 " 13.09 " 9.595" 7.059" 6.734" 1
2 4.901" 6.406" 5.377" 6.282" 8.015" 8.918" 15.11 " 12.43 " 12.11 " 9.449" 8.320" 6.743" 2
3 4.437" 210.9 " 5.324" 6.989" 8.476" 9.094" 12.33 " 20.37 " 11.92 " 9.751" 10.14 " 6.565" 3
4 4.383" 95.35 " 4.525" 7.245" 8.204" 15.60 " 18.08 " 21.94 " 11.74 " 9.534" 8.254" 6.614" 4
5 4.995" 28.93 " 4.522" 7.298" 28.44 " 106.8 " 28.22 " 27.61 " 11.60 " 9.041" 6.926" 6.880" 5
6 5.303" 10.41 " 5.140" 7.116" 261.7 " 187.8 " 36.28 " 22.55 " 11.29 " 8.823" 6.708" 5.933" 6
7 5.194" 6.817" 5.902" 7.739" 42.01 " 114.4 " 14.30 " 14.56 " 10.81 " 8.383" 7.483" 5.415" 7
8 4.743" 6.231" 17.90 " 8.340" 14.97 " 70.81 " 10.91 " 13.65 " 10.55 " 8.366" 8.576" 5.336" 8
9 4.666" 7.447" 33.69 " 8.648" 10.95 " 191.4 " 10.64 " 14.71 " 10.39 " 8.428" 7.759" 5.387" 9
10 5.390" 7.363" 28.98 " 9.063" 9.913" 103.1 " 10.33 " 14.00 " 10.02 " 8.110" 7.324" 5.629" 10
11 6.176" 5.754" 9.133" 7.802" 9.454" 53.86 " 18.10 " 13.38 " 9.770" 7.774" 6.945" 5.930" 11
12 6.007" 5.331" 7.513" 8.072" 9.593" 26.95 " 12.54 " 14.98 " 9.513" 8.132" 6.702" 6.157" 12
13 6.010" 7.190" 6.877" 6.892" 9.289" 17.73 " 15.87 " 13.62 " 9.510" 9.517" 6.530" 12.88 " 13
14 5.818" 6.249" 6.216" 6.208" 8.952" 13.08 " 27.72 " 12.27 " 9.726" 9.031" 6.516" 9.182" 14
15 5.510" 6.404" 6.457" 6.048" 8.862" 11.87 " 19.95 " 11.96 " 9.807" 8.255" 6.696" 6.914" 15
16 5.523" 6.284" 6.383" 6.117" 8.813" 11.48 " 20.75 " 11.65 " 9.457" 8.014" 6.696" 6.324" 16
17 5.960" 4.926" 6.682" 6.241" 8.705" 11.13 " 13.56 " 11.08 " 10.40 " 8.362" 6.002" 6.517" 17
18 6.155" 4.909" 6.678" 6.220" 8.189" 10.37 " 18.90 " 21.40 " 10.69 " 8.297" 5.806" 7.316" 18
19 6.090" 5.330" 6.583" 6.546" 7.806" 9.987" 20.38 " 18.41 " 9.526" 8.064" 5.995" 7.002" 19
20 6.298" 4.597" 6.489" 6.673" 8.075" 9.880" 45.07 " 18.48 " 9.208" 8.159" 6.728" 6.851" 20
21 5.984" 4.487" 6.834" 6.657" 8.214" 10.10 " 39.06 " 15.12 " 11.89 " 8.639" 7.083" 6.385" 21
22 5.964" 3.735" 6.774" 6.562" 8.344" 10.27 " 25.87 " 13.08 " 26.73 " 7.997" 7.067" 5.932" 22
23 6.022" 3.959" 6.416" 6.861" 8.236" 11.01 " 19.76 " 14.16 " 23.16 " 7.138" 7.228" 5.897" 23
24 5.957" 4.693" 5.887" 7.324" 8.229" 10.91 " 14.67 " 20.59 " 30.01 " 6.826" 6.620" 6.307" 24
25 6.027" 3.727" 5.083" 7.526" 8.616" 11.47 " 16.21 " 15.60 " 11.84 " 7.077" 5.803" 6.271" 25
26 5.837" 3.902" 5.098" 7.695" 11.35 " 11.36 " 23.05 " 15.83 " 10.27 " 8.057" 5.301" 6.029" 26
27 5.998" 4.200" 5.232" 7.835" 11.39 " 10.12 " 26.67 " 49.73 " 9.384" 8.096" 5.424" 6.082" 27
28 6.148" 4.242" 4.984" 7.989" 10.25 " 9.696" 32.38 " 38.28 " 10.39 " 9.105" 6.126" 6.566" 28
29 6.048" 5.044" 8.128" 9.779" 9.593" 28.03 " 32.25 " 13.50 " 8.015" 6.718" 6.534" 29
30 5.905" 5.666" 8.028" 9.328" 9.988" 18.74 " 17.95 " 10.39 " 7.253" 6.643" 6.109" 30
31 5.929" 6.254" 9.100" 15.52 " 14.29 " 6.985" 5.778" 31
Mean 5.633" 17.02 " 8.011" 7.199" 19.06 " 36.59 " 20.79 " 18.36 " 12.29 " 8.331" 6.906" 6.587"
Median 5.929" 5.992" 6.254" 7.180" 8.952" 11.25 " 18.74 " 14.98 " 10.48 " 8.255" 6.713" 6.324"
Maximum 6.298" 210.9 " 33.69 " 9.063" 261.7 " 191.4 " 45.07 " 49.73 " 30.01 " 9.751" 10.14 " 12.88 "
Minimum 4.383" 3.727" 4.522" 5.828" 7.622" 8.918" 10.33 " 11.08 " 9.208" 6.826" 5.301" 5.336"
Total 174.6 " 476.6 " 248.3 " 216.0 " 590.8 "1098 " 644.6 " 569.3 " 368.7 " 258.3 " 207.2 " 204.2 "
Summaries ------------------ Notes -------------------
--------- All recorded data is continuous and reliable
except where the following tags are used...
Annual Mean 13.85 " " ... Relative Uncertainty +/-10%
Ann. Median 8.159"
Annual Total 5056 "
Maximum Minimum
Daily 261.7 " 3.727"
Department of Water and Environmental Regulation HYDAY V146 Output 14/05/2026
Site 701009 Irwin River - Mountain Bridge Year 1986
VarFrom 10.00 Stage - SL in Metres Table Type Total
VarTo 151.00 Stream Discharge Volume in Megalitres
Figures are for period ending 24:00
Day Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec Day
1 5.799" 5.545" 7.810" 7.750" 6.541" 12.38 "1369 "1656 " 33.41 " 13.69 " 10.47 " 9.604" 1
2 6.066" 5.373" 247.5 " 9.080" 6.879" 11.80 " 505.4 " 725.6 " 29.88 " 13.26 " 10.55 " 9.015" 2
3 6.231" 5.160" 89.98 " 11.10 " 6.996" 11.39 " 334.2 " 332.8 " 27.41 " 14.22 " 11.00 " 8.425" 3
4 5.942" 5.287" 36.12 " 8.218" 7.706" 11.51 " 527.9 " 206.8 " 25.46 " 19.86 " 12.49 " 8.228" 4
5 7.780" 5.061" 15.92 " 7.521" 12.17 " 11.79 " 361.4 " 148.0 " 23.85 " 24.12 " 11.01 " 8.319" 5
6 6.988" 5.188" 9.788" 7.241" 9.817" 11.96 " 232.1 " 117.0 " 22.30 " 23.70 " 10.07 " 8.378" 6
7 5.828" 5.179" 7.953" 7.343" 8.802" 11.70 " 177.6 " 126.1 " 21.87 " 31.39 " 9.795" 7.899" 7
8 5.153" 5.479" 7.834" 7.799" 9.620" 11.03 " 143.3 " 536.0 " 21.46 " 20.20 " 9.938" 8.373" 8
9 6.119" 5.560" 8.014" 7.766" 8.852" 11.94 " 115.1 "2246 " 19.88 " 15.24 " 10.08 " 8.674" 9
10 6.489" 5.574" 8.005" 7.533" 8.756" 11.80 " 83.48 " 591.9 " 20.72 " 14.16 " 10.15 " 8.265" 10
11 5.717" 6.035" 7.899" 6.966" 8.940" 11.69 " 66.46 " 324.0 " 25.86 " 13.59 " 9.035" 7.873" 11
12 5.814" 6.530" 7.714" 6.997" 8.968" 11.20 " 56.06 " 217.4 " 23.81 " 14.86 " 9.404" 7.769" 12
13 5.931" 6.895" 7.346" 7.737" 47.74 " 11.12 " 51.98 " 171.5 " 26.57 " 17.64 " 10.22 " 7.692" 13
14 5.873" 6.455" 7.086" 7.791"2100 # 10.99 " 69.02 " 135.9 " 23.58 " 13.56 " 9.857" 8.078" 14
15 5.970" 5.912" 6.378" 7.110"1700 # 11.59 " 135.4 " 111.1 " 25.75 " 13.77 " 9.574" 8.467" 15
16 5.825" 5.794" 7.067" 6.814" 336.6 # 12.22 " 263.4 " 101.0 " 25.99 " 14.22 " 9.629" 7.840" 16
17 6.068" 5.528" 7.639" 6.643" 138.3 # 12.26 " 160.4 " 91.08 " 27.11 " 17.15 " 9.372" 7.386" 17
18 6.073" 6.065" 7.779" 6.665" 70.39 " 19.67 " 95.17 " 97.28 " 21.91 " 14.33 " 8.675" 7.359" 18
19 5.589" 6.005" 8.459" 6.703" 45.35 " 26.15 " 67.85 " 114.8 " 21.58 " 14.12 " 7.855" 7.473" 19
20 5.404" 17.95 " 9.687" 7.130" 44.85 " 33.57 " 55.27 " 107.6 " 18.79 " 13.69 " 8.330" 7.655" 20
21 5.433" 72.66 " 7.543" 7.225" 42.48 " 21.30 " 157.6 " 86.45 " 17.66 " 13.20 " 8.805" 8.016" 21
22 5.535" 138.3 " 7.115" 7.245" 41.25 " 14.00 "3268 " 131.0 " 16.75 " 12.01 " 8.890" 8.221" 22
23 5.824" 28.41 " 6.320" 7.473" 41.02 " 13.00 "7538 " 303.9 " 15.63 " 11.74 " 8.709" 8.187" 23
24 5.858" 14.20 " 6.548" 7.665" 29.14 " 16.84 "2474 " 252.8 " 15.17 " 12.00 " 8.930" 7.889" 24
25 5.931" 10.57 " 6.399" 7.243" 22.22 " 22.17 " 806.4 " 179.4 " 15.15 " 11.96 " 8.802" 7.880" 25
26 5.810" 9.269" 6.744" 6.546" 18.65 " 220.6 " 416.7 " 115.2 " 14.88 " 11.94 " 8.564" 8.252" 26
27 5.696" 8.534" 7.153" 6.451" 15.78 " 444.1 " 276.9 " 84.13 " 14.34 " 11.80 " 8.250" 8.219" 27
28 5.523" 8.035" 7.517" 6.671" 14.61 "1160 " 204.2 " 66.29 " 14.41 " 11.39 " 8.617" 8.022" 28
29 6.033" 7.910" 6.744" 13.92 "6938 " 161.5 " 51.77 " 14.98 " 11.88 " 8.893" 8.194" 29
30 7.013" 6.432" 6.333" 13.13 "6024 " 215.3 " 42.43 " 14.46 " 11.28 " 9.366" 8.140" 30
31 6.232" 7.223" 13.11 " 1052 " 37.40 " 10.70 " 7.769" 31
Mean 5.985" 14.88 " 19.12 " 7.383" 156.5 # 505.1 " 691.7 " 306.7 " 21.35 " 15.05 " 9.511" 8.115"
Median 5.873" 6.020" 7.714" 7.242" 14.61 # 12.24 " 204.2 " 131.0 " 21.72 " 13.69 " 9.388" 8.140"
Maximum 7.780" 138.3 " 247.5 " 11.10 "2100 #6938 "7538 "2246 " 33.41 " 31.39 " 12.49 " 9.604"
Minimum 5.153" 5.061" 6.320" 6.333" 6.541# 10.99 " 51.98 " 37.40 " 14.34 " 10.70 " 7.855" 7.359"
Total 185.5 " 416.5 " 592.8 " 221.5 " 4853 #15152 "21441 " 9508 " 640.6 " 466.7 " 285.3 " 251.6 "
Summaries ------------------ Notes -------------------
--------- All recorded data is continuous and reliable
except where the following tags are used...
Annual Mean 148.0 # " ... Relative Uncertainty +/-10%
Ann. Median 11.01 # # ... Relative Uncertainty +/-15%
Annual Total 54015 #
Maximum Minimum
Daily 7538 # 5.061#
Department of Water and Environmental Regulation HYDAY V146 Output 14/05/2026
Site 701009 Irwin River - Mountain Bridge Year 1987
VarFrom 10.00 Stage - SL in Metres Table Type Total
VarTo 151.00 Stream Discharge Volume in Megalitres
Figures are for period ending 24:00
Day Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec Day
1 7.620" 5.887" 6.100" 10.60 " 12.09 " 10.19 " 15.83 " 30.06 " 15.61 " 9.918" 19.19 " 9.748" 1
2 7.342" 5.814" 6.071" 9.656" 11.39 " 10.37 " 15.29 " 31.86 " 14.79 " 9.855" 11.78 " 8.934" 2
3 7.082" 5.712" 6.346" 9.348" 10.60 " 11.08 " 100.0 " 20.74 " 14.07 " 10.64 " 9.686" 8.576" 3
4 7.326" 5.831" 7.235" 9.490" 10.24 " 12.17 " 131.3 " 16.76 " 13.80 " 10.76 " 8.880" 9.061" 4
5 8.439" 6.315" 7.841" 8.711" 9.927" 11.73 " 172.7 " 14.97 " 13.59 " 10.40 " 8.450" 9.438" 5
6 8.612" 6.872" 7.140" 8.694" 9.536" 19.80 " 53.65 " 14.51 " 12.99 " 25.27 " 8.500" 9.619" 6
7 7.684" 6.863" 6.338" 9.493" 9.689" 93.65 " 29.79 " 14.59 " 12.37 " 41.60 " 8.788" 10.34 " 7
8 8.040" 6.840" 6.141" 11.33 " 10.71 " 299.3 " 54.49 " 13.92 " 12.50 " 24.17 " 9.017" 9.121" 8
9 8.471" 7.190" 6.070" 11.33 " 15.76 " 149.6 " 45.23 " 13.11 " 12.41 " 13.17 " 8.630" 8.680" 9
10 8.143" 6.701" 6.965" 9.787" 25.94 " 57.02 " 48.47 " 13.32 " 12.32 " 11.27 " 8.018" 8.637" 10
11 7.402" 5.933" 7.109" 9.501" 193.0 " 29.20 " 25.18 " 13.42 " 12.42 " 10.11 " 9.097" 8.735" 11
12 7.428" 5.948" 7.427" 8.968" 64.05 " 20.22 " 19.72 " 15.85 " 12.56 " 10.44 " 8.691" 8.877" 12
13 7.558" 6.008" 7.863" 8.528" 30.47 " 16.00 " 18.67 " 23.14 " 12.10 " 11.34 " 8.804" 8.961" 13
14 7.542" 6.401" 7.662" 8.450" 18.61 " 14.13 " 17.91 " 16.30 " 10.85 " 11.51 " 9.651" 8.724" 14
15 7.553" 6.368" 8.567" 8.524" 14.86 " 13.56 " 17.51 " 14.20 " 10.66 " 10.93 " 14.80 " 8.684" 15
16 7.364" 6.111" 8.942" 8.624" 13.30 " 13.79 " 18.15 " 13.65 " 10.70 " 10.39 " 11.21 " 8.421" 16
17 7.158" 6.763" 8.692" 8.610" 12.39 " 22.66 " 17.71 " 13.26 " 10.91 " 9.880" 9.770" 7.797" 17
18 7.316" 7.289" 8.838" 8.927" 12.05 " 30.47 " 16.42 " 13.01 " 11.36 " 9.418" 9.891" 6.980" 18
19 7.358" 7.064" 7.477" 9.540" 11.74 " 39.91 " 15.27 " 13.03 " 12.00 " 9.550" 9.264" 7.657" 19
20 6.942" 6.448" 6.934" 9.330" 11.66 " 77.69 " 14.54 " 19.02 " 11.44 " 9.636" 9.136" 8.398" 20
21 7.166" 5.732" 6.977" 9.891" 11.85 " 78.59 " 13.96 " 29.20 " 11.08 " 9.873" 9.289" 8.436" 21
22 7.236" 5.913" 7.171" 10.37 " 11.79 " 70.92 " 24.95 " 18.54 " 11.26 " 9.709" 9.371" 8.266" 22
23 7.438" 6.131" 8.178" 9.635" 11.63 " 37.31 " 20.77 " 15.56 " 19.73 " 9.533" 9.303" 8.225" 23
24 7.489" 6.759" 8.577" 9.548" 11.46 " 26.64 " 20.03 " 14.48 " 13.91 " 9.475" 8.828" 8.409" 24
25 7.657" 6.581" 8.520" 17.57 " 11.47 " 21.58 " 17.06 " 30.45 " 12.60 " 9.575" 8.440" 8.554" 25
26 7.413" 6.476" 8.146" 18.51 " 11.39 " 17.93 " 15.40 " 55.81 " 16.91 " 9.361" 7.874" 8.650" 26
27 6.892" 6.575" 8.093" 10.82 " 10.89 " 16.17 " 15.04 " 100.7 " 16.14 " 9.146" 7.910" 8.093" 27
28 6.516" 6.103" 7.652" 10.16 " 10.47 " 15.10 " 17.23 " 38.52 " 12.71 " 8.902" 8.540" 7.449" 28
29 6.825" 8.077" 10.11 " 10.47 " 14.93 " 28.30 " 25.12 " 11.51 " 9.005" 10.79 " 7.610" 29
30 6.839" 12.57 " 12.63 " 10.24 " 17.02 " 27.40 " 19.56 " 10.61 " 9.705" 14.05 " 8.223" 30
31 6.434" 16.19 " 10.40 " 32.79 " 17.12 " 10.95 " 8.175" 31
Mean 7.428" 6.380" 7.933" 10.22 " 20.32 " 42.29 " 34.86 " 22.70 " 12.86 " 12.11 " 9.855" 8.564"
Median 7.402" 6.384" 7.652" 9.544" 11.63 " 20.01 " 19.72 " 16.30 " 12.42 " 9.918" 9.116" 8.576"
Maximum 8.612" 7.289" 16.19 " 18.51 " 193.0 " 299.3 " 172.7 " 100.7 " 19.73 " 41.60 " 19.19 " 10.34 "
Minimum 6.434" 5.712" 6.070" 8.450" 9.536" 10.19 " 13.96 " 13.01 " 10.61 " 8.902" 7.874" 6.980"
Total 230.3 " 178.6 " 245.9 " 306.7 " 630.0 "1269 "1081 " 703.8 " 385.9 " 375.5 " 295.6 " 265.5 "
Summaries ------------------ Notes -------------------
--------- All recorded data is continuous and reliable
except where the following tags are used...
Annual Mean 16.35 " " ... Relative Uncertainty +/-10%
Ann. Median 10.11 "
Annual Total 5967 "
Maximum Minimum
Daily 299.3 " 5.712"
Department of Water and Environmental Regulation HYDAY V146 Output 14/05/2026
Site 701009 Irwin River - Mountain Bridge Year 1988
VarFrom 10.00 Stage - SL in Metres Table Type Total
VarTo 151.00 Stream Discharge Volume in Megalitres
Figures are for period ending 24:00
Day Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec Day
1 7.85" 6.64" 8.16" 7.54" 11.63" 82.68" 28.32" 110.0 " 34.60" 16.17" 12.60" 9.67" 1
2 7.63" 394.9 " 8.11" 7.75" 11.60" 176.0 " 25.53" 90.84" 30.21" 15.83" 12.48" 10.97" 2
3 7.01" 107.2 " 7.37" 7.86" 60.73" 460.7 " 22.87" 75.52" 26.93" 25.04" 10.97" 10.21" 3
4 6.40" 37.08" 6.77" 7.84" 25.70" 390.9 " 25.33" 63.99" 24.04" 28.80" 10.23" 9.24" 4
5 7.13" 118.5 " 6.52" 7.74" 17.27" 257.0 " 27.51" 53.32" 22.11" 19.63" 9.93" 8.54" 5
6 7.69" 39.69" 6.86" 7.72" 13.64" 169.1 " 26.28" 50.91" 24.30" 18.40" 13.68" 7.78" 6
7 7.62" 15.39" 7.45" 7.69" 12.41" 182.2 " 52.43" 75.08" 22.71" 17.44" 18.23" 7.62" 7
8 7.67" 9.76" 7.59" 7.64" 11.64" 326.8 " 97.53" 151.8 " 23.81" 15.26" 11.73" 8.03" 8
9 7.65" 8.61" 7.68" 8.24" 10.92" 248.1 " 140.0 " 112.4 " 27.29" 14.84" 10.63" 8.24" 9
10 7.83" 7.76" 8.13" 67.29" 10.55" 186.0 " 103.5 " 85.27" 23.59" 15.20" 9.55" 8.32" 10
11 7.94" 6.85" 7.86" 428.5 " 10.26" 155.4 " 66.72" 68.41" 21.31" 15.29" 10.02" 8.29" 11
12 7.99" 6.46" 7.33" 109.6 " 12.13" 124.2 " 59.81" 97.42" 19.11" 15.01" 12.81" 7.84" 12
13 8.14" 6.42" 8.26" 34.41" 15.33" 105.4 " 109.4 " 418.7 " 18.69" 15.01" 10.68" 7.54" 13
14 7.92" 6.56" 7.09" 23.93" 49.94" 90.74" 324.3 " 292.6 " 18.73" 14.48" 9.40" 7.98" 14
15 7.41" 6.45" 6.85" 567.2 " 61.23" 75.36" 222.0 " 305.8 " 19.04" 13.07" 8.80" 8.02" 15
16 7.22" 6.27" 7.22" 458.5 " 29.16" 68.31" 147.8 " 319.9 " 16.95" 12.40" 9.00" 7.84" 16
17 7.73" 6.24" 7.25" 159.9 " 26.52" 94.75" 118.1 " 296.4 " 16.41" 12.53" 9.12" 8.66" 17
18 7.94" 6.13" 7.02" 52.38" 37.26" 248.8 " 82.67" 212.7 " 15.81" 12.47" 9.18" 11.69" 18
19 7.66" 6.03" 6.86" 25.38" 27.89" 419.8 " 60.93" 143.0 " 16.52" 16.38" 8.74" 8.57" 19
20 7.37" 6.04" 6.78" 18.88" 55.84" 193.2 " 47.53" 125.5 " 16.11" 15.46" 8.60" 8.42" 20
21 7.32" 6.00" 7.19" 16.18"17712 $ 120.1 " 37.59" 362.3 " 18.04" 12.24" 8.68" 7.29" 21
22 7.21" 6.04" 7.89" 13.94"29460 $ 82.94" 32.16" 426.1 " 18.28" 11.73" 9.63" 7.64" 22
23 7.05" 6.82" 11.11" 12.57" 4750 " 61.87" 34.91" 212.3 " 16.35" 11.60" 9.20" 8.11" 23
24 6.36" 7.67" 11.95" 12.26" 1490 " 48.97" 1754 " 141.1 " 15.36" 11.07" 8.83" 8.04" 24
25 6.92" 7.87" 9.32" 12.27" 650.7 " 61.02" 3946 " 108.0 " 14.76" 11.04" 8.21" 7.82" 25
26 6.54" 7.65" 8.88" 11.86" 371.1 " 52.87" 1291 " 104.1 " 14.59" 11.33" 7.44" 6.77" 26
27 6.85" 7.58" 8.67" 14.39" 251.0 " 55.21" 577.6 " 97.03" 15.03" 10.93" 7.81" 7.71" 27
28 7.27" 7.90" 8.07" 13.39" 183.7 " 47.31" 359.6 " 69.78" 16.61" 10.77" 8.35" 8.07" 28
29 7.29" 8.37" 7.67" 13.14" 142.9 " 38.87" 242.5 " 60.31" 20.17" 10.87" 10.75" 7.72" 29
30 7.11" 7.30" 12.21" 113.6 " 32.22" 175.4 " 48.84" 19.87" 10.32" 11.01" 8.03" 30
31 6.90" 7.38" 93.96" 137.0 " 40.93" 10.48" 8.21" 31
Mean 7.375" 30.17 " 7.825" 71.61 "1798 $ 155.2 " 334.7 " 155.5 " 20.24 " 14.55 " 10.21 " 8.351"
Median 7.374" 7.579" 7.448" 13.27 " 37.26 $ 112.8 " 97.53 " 108.0 " 18.88 " 14.48 " 9.592" 8.042"
Maximum 8.14" 394.9 " 11.95" 567.2 "29460 $ 460.7 " 3946 " 426.1 " 34.60" 28.80" 18.23" 11.69"
Minimum 6.363" 6.004" 6.525" 7.539" 10.26 $ 32.22 " 22.87 " 40.93 " 14.59 " 10.32 " 7.442" 6.771"
Total 228.6 " 874.8 " 242.6 " 2148 "55732 $ 4657 "10377 " 4820 " 607.3 " 451.1 " 306.3 " 258.9 "
Summaries ------------------ Notes -------------------
--------- All recorded data is continuous and reliable
except where the following tags are used...
Annual Mean 220.5 $ " ... Relative Uncertainty +/-10%
Ann. Median 13.52 $ $ ... Relative Uncertainty +/-20%
Annual Total 80704 $
Maximum Minimum
Daily 29460 $ 6.004$
Department of Water and Environmental Regulation HYDAY V146 Output 14/05/2026
Site 701009 Irwin River - Mountain Bridge Year 1989
VarFrom 10.00 Stage - SL in Metres Table Type Total
VarTo 151.00 Stream Discharge Volume in Megalitres
Figures are for period ending 24:00
Day Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec Day
1 8.16" 6.14" 16.29" 9.78" 29.65" 450.1 " 49.03" 53.92" 14.28" 13.98" 9.91" 8.45" 1
2 8.28" 6.52" 10.09" 9.51" 66.50" 220.1 " 47.19" 38.96" 14.29" 20.32" 9.41" 8.52" 2
3 6.69" 6.86" 9.26" 9.54" 24.43" 125.0 " 43.70" 37.11" 13.98" 16.25" 10.11" 8.68" 3
4 6.45" 7.01" 9.24" 8.79" 13.83" 73.03" 37.64" 29.86" 13.60" 14.89" 10.25" 8.54" 4
5 7.28" 7.78" 9.46" 8.10" 11.85" 44.46" 31.74" 25.86" 13.48" 13.96" 9.09" 8.62" 5
6 8.31" 7.65" 9.39" 10.68" 11.03" 31.50" 27.94" 24.05" 13.95" 14.78" 8.81" 8.71" 6
7 8.04" 7.37" 8.76" 12.40" 10.59" 26.26" 25.91" 21.50" 17.11" 13.49" 9.02" 8.65" 7
8 7.83" 7.25" 8.37" 9.53" 10.61" 21.59" 29.38" 19.68" 14.79" 12.67" 9.20" 8.55" 8
9 7.59" 7.17" 8.73" 9.94" 10.64" 17.89" 25.26" 18.46" 13.97" 11.78" 9.51" 8.44" 9
10 7.23" 6.94" 8.78" 10.09" 10.78" 15.92" 23.25" 17.46" 13.04" 11.67" 9.55" 8.47" 10
11 7.46" 7.05" 8.40" 9.40" 10.79" 20.01" 21.55" 16.50" 12.41" 11.75" 9.53" 8.75" 11
12 7.92" 8.16" 7.49" 8.97" 10.95" 27.06" 20.63" 16.11" 12.25" 11.74" 9.67" 8.72" 12
13 7.86" 7.62" 112.9 " 9.57" 10.73" 263.7 " 22.41" 16.07" 11.96" 11.78" 9.81" 8.27" 13
14 7.96" 7.01" 103.4 " 10.89" 9.77"15362 $ 22.88" 15.77" 12.32" 11.52" 10.31" 8.35" 14
15 8.39" 6.88" 23.64" 10.09" 11.37" 2941 " 20.23" 15.58" 14.23" 11.05" 9.52" 8.58" 15
16 7.78" 7.46" 10.94" 9.30" 23.03" 814.5 " 19.40" 14.65" 12.68" 11.03" 8.65" 8.62" 16
17 7.09" 7.74" 9.11" 9.06" 23.01" 401.9 " 18.91" 13.77" 14.55" 11.67" 8.26" 8.25" 17
18 6.92" 7.14" 8.68" 8.94" 59.55" 254.9 " 18.32" 28.49" 21.83" 13.20" 8.03" 7.66" 18
19 7.33" 6.50" 8.45" 9.25" 43.03" 184.0 " 17.84" 21.47" 14.92" 11.64" 7.79" 7.40" 19
20 7.37" 6.14" 8.19" 9.42" 20.54" 141.7 " 28.15" 16.43" 20.57" 10.40" 7.72" 7.22" 20
21 7.97" 7.20" 8.51" 9.34" 20.38" 113.4 " 168.1 " 15.37" 17.70" 10.42" 8.07" 7.89" 21
22 8.45" 7.95" 8.39" 8.92" 72.75" 94.59" 794.7 " 14.14" 18.15" 10.05" 8.49" 8.84" 22
23 8.36" 8.39" 7.71" 12.07" 91.50" 79.07" 389.8 " 13.68" 15.62" 9.90" 8.34" 8.55" 23
24 7.70" 9.02" 7.08" 14.85" 34.29" 67.28" 216.8 " 16.80" 14.55" 9.88" 8.49" 8.68" 24
25 7.71" 18.89" 7.09" 9.95" 30.77" 57.99" 124.9 " 16.03" 12.56" 11.05" 8.83" 8.61" 25
26 7.99" 11.47" 7.61" 9.56" 80.12" 49.90" 80.79" 14.54" 12.06" 10.29" 9.09" 7.98" 26
27 7.23" 9.20" 7.75" 9.62" 138.9 " 43.05" 74.60" 14.45" 13.45" 9.92" 9.24" 8.01" 27
28 6.91" 61.56" 7.73" 9.63" 527.0 " 45.00" 86.50" 15.06" 16.79" 10.12" 9.08" 8.62" 28
29 6.58" 7.77" 9.76" 404.3 " 47.27" 91.39" 15.71" 13.50" 16.73" 8.70" 8.75" 29
30 6.05" 8.06" 20.71" 218.0 " 50.06" 71.31" 16.06" 13.17" 14.90" 8.61" 9.12" 30
31 6.06" 9.16" 491.9 " 77.11" 14.57" 10.80" 8.93" 31
Mean 7.514" 9.860" 15.69 " 10.25 " 81.70 " 736.1 $ 87.98 " 20.26 " 14.59 " 12.38 " 9.037" 8.433"
Median 7.704" 7.313" 8.681" 9.567" 23.03 " 70.16 $ 31.74 " 16.11 " 13.98 " 11.67 " 9.083" 8.555"
Maximum 8.45" 61.56" 112.9 " 20.71" 527.0 "15362 $ 794.7 " 53.92" 21.83" 20.32" 10.31" 9.12"
Minimum 6.049" 6.138" 7.076" 8.100" 9.772" 15.92 $ 17.84 " 13.68 " 11.96 " 9.881" 7.717" 7.216"
Total 232.9 " 276.1 " 486.4 " 307.6 " 2533 "22084 $ 2727 " 628.1 " 437.7 " 383.6 " 271.1 " 261.4 "
Summaries ------------------ Notes -------------------
--------- All recorded data is continuous and reliable
except where the following tags are used...
Annual Mean 83.92 $ " ... Relative Uncertainty +/-10%
Ann. Median 10.79 $ $ ... Relative Uncertainty +/-20%
Annual Total 30630 $
Maximum Minimum
Daily 15362 $ 6.049$
Department of Water and Environmental Regulation HYDAY V146 Output 14/05/2026
Site 701009 Irwin River - Mountain Bridge Year 1990
VarFrom 10.00 Stage - SL in Metres Table Type Total
VarTo 151.00 Stream Discharge Volume in Megalitres
Figures are for period ending 24:00
Day Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec Day
1 8.435" 183.1 " 8.982" 9.316" 11.56 " [ ] [ ] 17.34 " 14.59 " 12.33 " 11.60 " 8.708" 1
2 8.168" 82.83 " 9.794" 11.57 " 11.28 " [ ] [ ] 56.99 " 14.06 " 12.08 " 11.37 " 8.788" 2
3 7.878" 41.91 " 10.53 " 10.94 " 11.53 " [ ] [ ] 194.1 " 13.27 " 11.59 " 11.12 " 8.988" 3
4 7.747" 26.17 " 9.425" 9.530" 12.62 " [ ] [ ] 182.6 " 12.89 " 11.09 " 10.81 " 10.63 " 4
5 7.598" 18.96 " 8.674" 9.154" 11.69 " [ ] [ ] 127.5 " 12.84 " 11.67 " 10.54 " 9.922" 5
6 7.864" 14.77 " 8.755" 8.862" 10.60 " [ ] [ ] 87.74 " 12.62 "2028 " 10.14 " 8.936" 6
7 7.457" 14.01 " 9.033" 8.516" 11.01 " [ ] [ ] 57.29 " 23.27 "1175 " 10.13 " 8.932" 7
8 7.378" 13.59 " 9.095" 8.487" 11.27 " [ ] [ ] 39.01 " 21.89 " 336.8 " 9.981" 8.505" 8
9 8.017" 14.16 " 9.699" 8.760" 11.48 " [ ] [ ] 30.16 " 17.30 " 156.7 " 9.432" 9.612" 9
10 8.473" 15.71 " 9.291" 11.41 " 11.20 " [ ] [ ] 25.60 " 17.90 " 86.03 " 9.029" 7.795" 10
11 7.930" 11.85 " 9.669" 11.36 " 11.23 " [ ] [ ] 21.91 " 14.09 " 59.18 " 9.033" 7.661" 11
12 7.873" 12.10 " 9.684" 10.20 " 11.44 " [ ] [ ] 19.67 " 13.24 " 40.40 " 9.671" 7.473" 12
13 8.041" 12.68 " 8.950" 9.302" 17.79 " [ ] [ ] 19.32 " 12.74 " 33.71 " 9.795" 8.034" 13
14 8.349" 12.07 " 8.154" 9.103" 22.07 " [ ] [ ] 18.39 " 12.38 " 25.69 " 9.303" 8.777" 14
15 8.266" 13.07 " 7.768" 8.865" 21.73 " [ ] [ ] 17.84 " 15.40 " 20.67 " 9.623" 8.846" 15
16 8.033" 10.81 " 8.328" 8.725" 16.89 " [ ] [ ] 19.71 " 14.59 " 17.72 " 9.976" 8.840" 16
17 7.603" 10.52 " 8.473" 8.746" 14.83 " [ ] [ ] 20.47 " 14.62 " 16.14 " 10.20 " 8.988" 17
18 7.322" 10.42 " 8.880" 8.672" 13.85 " [ ] [ ] 20.58 " 16.34 " 14.54 " 9.778" 8.801" 18
19 7.675" 10.31 " 9.162" 12.70 " 14.84 " [ ] [ ] 18.05 " 14.75 " 13.63 " 10.50 " 8.796" 19
20 8.637" 10.42 " 8.957" 29.71 " 14.12 " [ ] [ ] 16.15 " 13.39 " 13.27 " 10.32 " 8.879" 20
21 8.435" 10.67 " 8.993" 27.46 " 12.61 " [ ] [ ] 15.40 " 12.65 " 12.65 " 9.568" 8.960" 21
22 8.556" 10.69 " 9.027" 26.29 " 13.73 " [ ] [ ] 14.57 " 13.63 " 12.21 " 9.412" 9.059" 22
23 8.031" 9.942" 8.985" 14.81 " 12.30 " [ ] [ ] 14.10 " 17.57 " 12.19 " 9.157" 8.997" 23
24 6.801" 9.289" 8.936" 17.12 " 11.70 " [ ] [ ] 18.96 " 21.91 " 12.06 " 8.741" 9.047" 24
25 6.602" 8.894" 9.612" 14.45 " 11.20 " [ ] [ ] 24.78 " 15.92 " 11.98 " 8.880" 9.000" 25
26 7.090" 8.724" 10.33 " 12.73 " 20.45 " [ ] 113.8 " 18.14 " 13.17 " 12.00 " 8.807" 8.621" 26
27 7.975" 8.808" 9.301" 12.76 " 39.80 " [ ] 64.21 " 19.56 " 12.52 " 11.16 " 8.972" 8.357" 27
28 36.84 " 8.916" 8.671" 12.11 " [ ] [ ] 39.72 " 22.60 " 11.94 " 11.22 " 8.869" 8.254" 28
29 3179 " 8.506" 11.84 " [ ] [ ] 29.97 " 18.25 " 11.78 " 14.78 " 8.418" 8.489" 29
30 1513 " 8.928" 11.71 " [ ] [ ] 24.44 " 16.35 " 12.58 " 13.68 " 8.481" 8.499" 30
31 419.9 " 9.973" [ ] 20.08 " 15.28 " 11.78 " 8.508" 31
Mean 172.9 " 21.98 " 9.115" 12.51 " 14.62 " [ ] 48.70 " 38.98 " 14.86 " 136.5 " 9.722" 8.765"
Median 8.017" 11.96 " 8.993" 11.15 " 12.30 " [ ] 34.85 " 19.67 " 13.84 " 13.63 " 9.647" 8.801"
Maximum 3179 " 183.1 " 10.53 " 29.71 " 39.80 " [ ] 113.8 " 194.1 " 23.27 "2028 " 11.60 " 10.63 "
Minimum 6.602" 8.724" 7.768" 8.487" 10.60 " [ ] 20.08 " 14.10 " 11.78 " 11.09 " 8.418" 7.473"
Total 5361 " 615.4 " 282.6 " 375.2 " 394.8 " [ ] 292.2 "1208 " 445.9 "4231 " 291.7 " 271.7 "
Missing Days 0 0 0 0 4 30 25 0 0 0 0 0
Summaries ------------------ Notes -------------------
--------- All recorded data is continuous and reliable
except where the following tags are used...
Annual Mean 45.00 " " ... Relative Uncertainty +/-10%
Ann. Median 11.25 " [ ... Not Available
Annual Total 13770 "
Missing Days 59
Maximum Minimum
Daily 3179 " 6.602"
Department of Water and Environmental Regulation HYDAY V146 Output 14/05/2026
Site 701009 Irwin River - Mountain Bridge Year 1991
VarFrom 10.00 Stage - SL in Metres Table Type Total
VarTo 151.00 Stream Discharge Volume in Megalitres
Figures are for period ending 24:00
Day Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec Day
1 8.580" 7.380" 7.980" 8.892" 9.870" 18.96 " 21.02 " 74.16 " 15.26 " 15.93 " 10.53 " 9.005" 1
2 8.637" 8.081" 8.570" 8.339" 9.458" 16.05 " 95.72 " 92.95 " 14.97 " 12.69 " 10.15 " 8.993" 2
3 8.130" 7.963" 8.287" 8.049" 10.47 " 15.85 " 559.2 " 88.80 " 15.00 " 12.39 " 9.777" 9.077" 3
4 7.924" 7.783" 8.242" 8.083" 11.91 " 42.30 " 512.7 " 112.7 " 14.89 " 15.10 " 11.50 " 9.586" 4
5 7.633" 7.581" 8.085" 8.164" 11.39 " 100.6 " 297.8 " 86.15 " 14.76 " 17.46 " 31.16 " 9.923" 5
6 7.542" 7.131" 8.172" 8.291" 9.995" 36.72 " 150.0 " 70.28 " 15.35 " 12.70 " 15.28 " 9.408" 6
7 8.765" 6.963" 8.085" 8.595" 9.615" 24.88 " 85.20 " 44.98 " 17.82 " 11.91 " 11.76 " 8.989" 7
8 8.356" 7.264" 8.313" 9.058" 9.537" 17.38 " 51.83 " 33.04 " 21.72 " 11.72 " 11.12 " 8.801" 8
9 8.281" 7.757" 8.105" 10.21 " 9.327" 15.21 " 37.86 " 26.67 " 25.89 " 11.24 " 10.93 " 8.397" 9
10 8.056" 7.854" 7.859" 19.52 " 9.697" 19.03 " 36.56 " 22.92 " 17.27 " 10.46 " 10.82 " 7.956" 10
11 7.976" 7.912" 8.129" 16.90 " 10.41 " 17.80 " 31.19 " 20.74 " 19.51 " 11.06 " 10.74 " 8.420" 11
12 7.849" 8.019" 7.513" 10.83 " 10.39 " 25.54 " 30.02 " 19.11 " 20.32 " 11.93 " 10.71 " 9.347" 12
13 8.383" 8.136" 6.806" 9.601" 10.25 " 23.56 " 25.97 " 17.72 " 19.65 " 13.22 " 27.84 " 8.810" 13
14 8.256" 7.801" 6.929" 9.178" 10.42 " 49.18 " 22.06 " 16.91 " 20.74 " 11.25 " 21.64 " 8.129" 14
15 7.159" 6.827" 7.762" 8.961" 11.06 " 38.81 " 20.53 " 16.25 " 21.55 " 11.54 " 14.83 " 7.612" 15
16 7.674" 7.362" 8.662" 8.959" 12.01 " 153.9 " 20.18 " 16.92 " 19.57 " 10.42 " 12.59 " 7.185" 16
17 7.652" 8.112" 8.607" 8.858" 12.03 "1122 " 20.83 " 17.44 " 16.40 " 10.49 " 11.68 " 7.768" 17
18 7.621" 8.059" 8.488" 8.569" 11.88 " 432.0 " 21.15 " 26.02 " 16.40 " 14.01 " 11.14 " 8.710" 18
19 7.277" 7.575" 8.042" 8.498" 12.55 " 232.4 " 30.03 " 22.02 " 16.15 " 16.53 " 10.58 " 8.931" 19
20 7.642" 7.693" 7.802" 8.936" 13.13 " 111.0 " 42.02 " 20.14 " 15.15 " 11.63 " 9.462" 8.587" 20
21 8.360" 7.587" 8.384" 16.75 " 14.55 " 62.10 " 110.1 " 19.80 " 14.54 " 10.63 " 8.962" 9.081" 21
22 7.944" 7.422" 8.716" 68.83 " 15.58 " 39.69 " 207.0 " 18.53 " 14.42 " 10.41 " 9.139" 9.541" 22
23 7.921" 6.684" 8.997" 67.41 " 14.32 " 31.36 " 254.9 " 17.46 " 13.88 " 10.18 " 9.683" 9.276" 23
24 7.667" 7.310" 8.984" 18.73 " 13.11 " 31.62 " 204.3 " 16.01 " 13.62 " 10.01 " 10.08 " 23.10 " 24
25 7.979" 9.312" 8.659" 12.25 " 12.59 " 42.74 " 167.2 " 15.74 " 13.33 " 9.995" 10.27 " 43.93 " 25
26 7.743" 9.489" 8.246" 12.04 " 12.67 " 28.55 " 115.3 " 16.10 " 13.09 " 10.10 " 10.26 " 40.22 " 26
27 7.534" 7.931" 8.436" 12.12 " 13.32 " 34.40 " 111.1 " 19.97 " 12.66 " 10.57 " 9.505" 15.65 " 27
28 7.220" 7.822" 8.711" 11.30 " 15.68 " 43.07 " 114.1 " 18.72 " 12.37 " 11.22 " 9.283" 11.31 " 28
29 6.064" 9.162" 10.61 " 18.69 " 37.79 " 91.56 " 18.40 " 12.50 " 10.36 " 9.414" 10.31 " 29
30 6.174" 9.105" 10.13 " 27.43 " 25.78 " 76.49 " 16.32 " 15.31 " 9.886" 9.269" 9.567" 30
31 6.705" 8.978" 21.02 " 77.67 " 15.61 " 9.947" 9.841" 31
Mean 7.765" 7.743" 8.284" 14.56 " 12.72 " 96.35 " 117.5 " 33.50 " 16.47 " 11.84 " 12.34 " 11.79 "
Median 7.849" 7.770" 8.287" 9.390" 11.91 " 35.56 " 77.67 " 19.80 " 15.29 " 11.24 " 10.65 " 9.077"
Maximum 8.765" 9.489" 9.162" 68.83 " 27.43 "1122 " 559.2 " 112.7 " 25.89 " 17.46 " 31.16 " 43.93 "
Minimum 6.064" 6.684" 6.806" 8.049" 9.327" 15.21 " 20.18 " 15.61 " 12.37 " 9.886" 8.962" 7.185"
Total 240.7 " 216.8 " 256.8 " 436.7 " 394.4 "2891 "3642 "1039 " 494.1 " 367.0 " 370.1 " 365.5 "
Summaries ------------------ Notes -------------------
--------- All recorded data is continuous and reliable
except where the following tags are used...
Annual Mean 29.35 " " ... Relative Uncertainty +/-10%
Ann. Median 11.12 "
Annual Total 10713 "
Maximum Minimum
Daily 1122 " 6.064"
Department of Water and Environmental Regulation HYDAY V146 Output 14/05/2026
Site 701009 Irwin River - Mountain Bridge Year 1992
VarFrom 10.00 Stage - SL in Metres Table Type Total
VarTo 151.00 Stream Discharge Volume in Megalitres
Figures are for period ending 24:00
Day Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec Day
1 9.705" 7.976" 7.585" 11.12 " 381.4 " 12.43 " 160.0 " 17.50 " 175.1 " 33.43 " 10.08 " 10.91 " 1
2 9.478" 8.117" 7.597" 10.99 " 155.4 " 11.83 " 138.6 " 23.94 " 153.3 " 55.83 " 9.718" 9.207" 2
3 8.973" 127.0 " 7.862" 10.72 " 66.11 " 11.91 " 99.48 " 20.39 " 151.2 " 43.91 " 8.879" 8.552" 3
4 8.535" 34.31 " 7.778" 10.49 " 36.47 " 12.16 " 64.40 " 27.34 " 560.8 " 90.10 " 9.267" 8.038" 4
5 8.413" 13.00 " 7.701" 10.26 " 26.35 " 11.92 " 44.93 " 24.58 "1709 " 55.89 " 10.37 " 7.886" 5
6 8.201" 9.644" 8.378" 10.11 " 22.31 " 11.60 " 32.98 " 19.69 "1201 " 39.72 " 10.92 " 7.641" 6
7 7.297" 10.02 " 8.775" 12.24 " 22.41 " 11.41 " 27.96 " 22.05 " 384.4 " 29.49 " 11.13 " 8.341" 7
8 6.712" 9.170" 8.636" 828.6 " 17.72 " 11.46 " 24.18 " 19.73 " 201.8 " 23.37 " 10.49 " 8.707" 8
9 7.214" 9.382" 8.517"1524 " 15.54 " 11.58 " 22.34 "2554 " 141.8 " 19.91 " 9.349" 8.927" 9
10 8.094" 8.927" 8.523"1107 " 14.58 " 20.79 " 23.45 "3983 " 105.0 " 17.72 " 9.099" 8.819" 10
11 8.053" 8.392" 8.197" 596.8 " 13.95 " 17.24 " 20.65 "1172 " 86.03 " 16.66 " 8.842" 8.237" 11
12 7.728" 8.162" 8.166" 267.9 " 13.89 " 25.87 " 18.56 " 629.2 " 69.93 " 16.68 " 8.751" 8.443" 12
13 6.835" 8.320" 8.259" 129.5 " 14.25 " 22.66 " 21.73 " 347.4 " 59.93 " 15.84 " 9.379" 8.776" 13
14 6.970" 8.496" 8.520" 68.28 " 15.49 " 23.92 " 19.29 " 235.5 " 49.18 " 15.00 " 10.20 " 8.289" 14
15 8.099" 8.288" 889.8 " 39.63 " 14.64 " 127.1 " 16.30 " 164.5 " 40.50 " 14.26 " 11.30 " 7.467" 15
16 7.948" 9.057" 410.7 " 264.9 " 13.06 " 359.6 " 15.29 " 134.7 " 34.83 " 14.06 " 13.64 " 6.657" 16
17 8.447" 9.878"1174 "6433 " 12.29 " 199.0 " 15.68 " 110.4 " 29.76 " 13.61 " 10.73 " 6.235" 17
18 9.700" 8.654" 557.8 "2031 " 12.01 " 116.4 " 15.33 " 83.91 " 25.79 " 12.92 " 11.07 " 7.365" 18
19 9.782" 7.972" 204.1 " 704.5 " 12.17 " 84.82 " 16.23 " 62.99 " 274.4 " 12.53 " 13.30 " 8.031" 19
20 8.549" 8.041" 92.23 " 371.8 " 12.02 " 53.07 " 18.42 " 46.37 "3272 " 11.82 " 17.33 " 7.939" 20
21 8.449" 7.820" 47.23 " 197.7 " 12.21 " 51.64 " 16.20 " 36.95 " 945.5 " 11.35 " 12.41 " 7.822" 21
22 8.274" 7.459" 28.71 " 123.0 " 12.57 " 32.95 " 14.83 " 31.30 " 441.0 " 11.68 " 11.11 " 8.138" 22
23 7.682" 7.088" 19.85 " 101.6 " 15.99 " 30.58 " 14.21 " 28.16 " 271.9 " 12.28 " 10.05 " 8.083" 23
24 10.27 " 6.668" 15.65 " 78.24 " 15.98 " 27.71 " 13.70 " 33.79 " 185.4 " 12.75 " 9.520" 8.001" 24
25 9.615" 5.844" 24.03 " 50.79 " 13.52 " 35.92 " 16.18 " 45.41 " 126.7 " 12.39 " 9.615" 7.896" 25
26 8.079" 5.601" 72.01 " 33.43 " 12.64 " 37.82 " 19.54 "1968 " 91.56 " 11.60 " 9.543" 7.517" 26
27 10.89 " 5.642" 29.38 " 29.79 " 12.55 " 125.8 " 15.84 "1425 " 63.52 " 11.18 " 9.456" 7.836" 27
28 8.011" 6.029" 26.35 " 24.86 " 13.64 " 109.6 " 16.96 " 590.4 " 45.38 " 11.19 " 9.464" 7.999" 28
29 7.592" 6.970" 16.42 " 21.67 " 14.05 " 135.9 " 19.05 "1099 " 33.98 " 11.16 " 9.962" 7.846" 29
30 8.305" 12.23 " 71.70 " 13.38 " 223.2 " 15.30 " 436.6 " 28.77 " 11.06 " 10.90 " 8.145" 30
31 7.477" 11.06 " 12.93 " 14.85 " 228.4 " 10.34 " 7.873" 31
Mean 8.367" 13.17 " 120.9 " 505.9 " 33.60 " 65.59 " 32.02 " 504.0 " 365.3 " 21.93 " 10.53 " 8.117"
Median 8.201" 8.288" 12.23 " 74.97 " 14.05 " 29.15 " 18.56 " 83.91 " 134.2 " 14.06 " 10.06 " 8.031"
Maximum 10.89 " 127.0 "1174 "6433 " 381.4 " 359.6 " 160.0 "3983 "3272 " 90.10 " 17.33 " 10.91 "
Minimum 6.712" 5.601" 7.585" 10.11 " 12.01 " 11.41 " 13.70 " 17.50 " 25.79 " 10.34 " 8.751" 6.235"
Total 259.4 " 382.0 " 3747 "15176 " 1042 " 1968 " 992.5 "15623 "10959 " 679.8 " 315.9 " 251.6 "
Summaries ------------------ Notes -------------------
--------- All recorded data is continuous and reliable
except where the following tags are used...
Annual Mean 140.4 " " ... Relative Uncertainty +/-10%
Ann. Median 14.13 "
Annual Total 51394 "
Maximum Minimum
Daily 6433 " 5.601"
Department of Water and Environmental Regulation HYDAY V146 Output 14/05/2026
Site 701009 Irwin River - Mountain Bridge Year 1993
VarFrom 10.00 Stage - SL in Metres Table Type Total
VarTo 151.00 Stream Discharge Volume in Megalitres
Figures are for period ending 24:00
Day Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec Day
1 7.871" 7.999" 6.037" 9.128" 34.27 " 118.5 " 45.46 " 129.9 " 48.60 " 14.09 " 9.917" 8.460" 1
2 7.761" 7.749" 5.979" 9.339"1855 " 74.66 " 39.10 " 75.84 " 30.82 " 14.44 " 9.322" 8.086" 2
3 7.475" 7.129" 6.604" 9.873"1591 " 52.54 " 32.95 " 49.77 " 23.49 " 12.83 " 9.170" 8.149" 3
4 7.064" 6.906" 7.467" 10.01 "1027 " 34.03 " 28.87 " 50.30 " 49.64 " 12.05 " 9.070" 7.693" 4
5 6.476" 7.363" 7.171" 9.267" 378.8 " 24.90 " 24.35 " 57.57 " 34.85 " 11.67 " 9.371" 6.592" 5
6 5.828" 7.862" 7.501" 9.254" 215.8 " 19.71 " 20.32 " 243.3 " 50.84 " 11.65 " 9.521" 6.843" 6
7 5.700" 6.320" 8.204" 9.173" 125.1 " 16.31 " 17.07 " 867.9 " 40.35 " 11.93 " 9.618" 6.729" 7
8 5.483" 6.334" 8.280" 9.206" 75.54 " 22.31 " 15.36 " 412.8 " 32.62 " 11.39 " 9.939" 7.415" 8
9 5.836" 6.828" 8.294" 9.279" 50.33 " 104.5 " 14.82 " 241.5 " 30.58 " 10.84 " 9.802" 7.656" 9
10 6.766" 6.675" 8.370" 9.721" 34.39 "1082 " 14.73 " 165.5 " 26.48 " 10.28 " 10.66 " 7.753" 10
11 7.207" 6.487" 8.933" 9.814" 24.83 " 318.1 " 16.78 " 118.6 " 20.56 " 10.52 " 9.688" 7.221" 11
12 7.162" 6.217" 8.325" 10.60 " 18.85 " 169.6 " 27.45 " 142.9 " 19.29 " 10.21 " 13.88 " 7.175" 12
13 7.338" 6.438" 7.998" 9.668" 15.59 " 94.56 " 20.76 " 237.5 " 17.17 " 10.74 " 20.78 " 7.075" 13
14 7.583" 6.828" 8.213" 9.170" 14.08 " 56.18 " 37.09 " 299.2 " 16.73 " 14.69 " 13.95 " 6.896" 14
15 7.833" 6.974" 8.590" 10.09 " 13.31 " 37.26 " 35.09 " 137.3 " 17.31 " 14.75 " 10.87 " 6.540" 15
16 7.877" 7.749" 8.515" 10.30 " 12.74 " 29.49 " 34.01 " 79.86 " 17.92 " 12.34 " 11.60 " 6.271" 16
17 7.531" 8.299" 8.500" 9.734" 12.16 " 26.53 " 26.76 " 60.89 " 19.24 " 11.69 " 12.01 " 6.084" 17
18 7.716" 8.316" 8.732" 9.651" 12.12 " 24.74 " 18.89 " 47.60 " 19.33 " 10.90 " 9.950" 6.511" 18
19 7.821" 7.799" 8.863" 9.685" 14.38 " 21.60 " 15.95 " 37.14 " 17.76 " 10.23 " 9.008" 7.498" 19
20 7.434" 6.515" 9.476" 9.656" 13.23 " 19.98 " 15.13 " 30.28 " 16.14 " 10.05 " 8.686" 7.348" 20
21 6.907" 5.851" 9.561" 9.435" 12.09 " 18.05 " 14.37 " 25.95 " 14.80 " 10.23 " 8.746" 6.966" 21
22 6.632" 6.535" 9.295" 9.518" 11.77 " 19.77 " 19.83 " 22.88 " 15.44 " 10.20 " 8.642" 6.832" 22
23 6.974" 7.101" 9.161" 9.554" 11.90 " 18.72 " 21.61 " 20.41 " 21.78 " 10.96 " 8.282" 6.659" 23
24 7.357" 7.677" 9.139" 9.506" 11.61 " 34.40 " 17.01 " 18.70 " 16.59 " 10.33 " 7.874" 6.822" 24
25 7.328" 7.494" 9.344" 9.485" 11.30 " 34.00 " 16.41 " 22.32 " 14.25 " 10.03 " 8.025" 6.659" 25
26 7.170" 7.415" 9.272" 9.591" 11.16 " 71.55 " 29.21 " 18.90 " 13.53 " 10.03 " 8.473" 5.898" 26
27 6.955" 6.909" 9.246" 9.507" 16.28 " 158.3 " 44.76 " 18.03 " 13.43 " 11.18 " 8.182" 5.853" 27
28 6.980" 5.931" 9.059" 10.54 " 59.83 " 94.87 " 89.81 " 17.72 " 12.88 " 10.04 " 8.369" 6.083" 28
29 6.754" 9.220" 11.67 " 926.8 " 66.08 " 138.1 " 25.86 " 13.66 " 9.596" 8.716" 6.971" 29
30 7.023" 9.672" 12.94 " 462.0 " 52.86 " 238.1 " 29.44 " 15.63 " 10.01 " 8.893" 6.725" 30
31 7.604" 9.745" 238.3 " 256.7 " 54.92 " 11.57 " 6.618" 31
Mean 7.079" 7.061" 8.476" 9.812" 235.9 " 97.20 " 44.74 " 121.3 " 23.39 " 11.34 " 10.03 " 6.970"
Median 7.170" 6.942" 8.590" 9.621" 18.85 " 35.83 " 24.35 " 54.92 " 18.58 " 10.90 " 9.346" 6.843"
Maximum 7.877" 8.316" 9.745" 12.94 "1855 "1082 " 256.7 " 867.9 " 50.84 " 14.75 " 20.78 " 8.460"
Minimum 5.483" 5.851" 5.979" 9.128" 11.16 " 16.31 " 14.37 " 17.72 " 12.88 " 9.596" 7.874" 5.853"
Total 219.4 " 197.7 " 262.8 " 294.4 "7311 "2916 "1387 "3761 " 701.7 " 351.4 " 301.0 " 216.1 "
Summaries ------------------ Notes -------------------
--------- All recorded data is continuous and reliable
except where the following tags are used...
Annual Mean 49.09 " " ... Relative Uncertainty +/-10%
Ann. Median 10.52 "
Annual Total 17919 "
Maximum Minimum
Daily 1855 " 5.483"
Department of Water and Environmental Regulation HYDAY V146 Output 14/05/2026
Site 701009 Irwin River - Mountain Bridge Year 1994
VarFrom 10.00 Stage - SL in Metres Table Type Total
VarTo 151.00 Stream Discharge Volume in Megalitres
Figures are for period ending 24:00
Day Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec Day
1 6.725" 5.902" 211.6 " 7.958" 9.064" 92.44 " 83.36 " 14.33 " 25.75 " 13.03 " 9.048" 8.804" 1
2 6.736" 6.729" 522.0 " 7.866" 8.901" 74.65 " 298.3 " 13.91 " 21.48 " 12.34 " 9.235" 9.136" 2
3 6.702" 6.867" 207.3 " 8.203" 9.027" 48.10 " 113.3 " 14.02 " 17.84 " 11.78 " 9.171" 8.690" 3
4 6.953" 7.366" 85.41 " 8.623" 9.022" 37.40 " 56.93 " 46.65 " 15.34 " 10.65 " 8.830" 8.460" 4
5 7.165" 7.556" 42.23 " 8.820" 9.429" 26.35 " 31.92 " 27.88 " 14.66 " 10.73 " 7.912" 8.290" 5
6 7.178" 7.483" 24.26 " 8.450" 9.863" 20.99 " 23.27 " 18.91 " 14.55 " 10.15 " 7.173" 8.099" 6
7 7.040" 7.536" 14.83 " 8.534" 9.623" 24.86 " 19.42 " 16.82 " 14.64 " 9.996" 7.782" 7.676" 7
8 6.996" 7.595" 10.56 " 8.778" 9.011" 21.34 " 24.62 " 16.46 " 13.35 " 9.920" 8.559" 6.978" 8
9 6.927" 7.433" 9.587" 9.010" 8.775" 21.59 " 31.24 " 18.57 " 12.63 " 9.844" 8.846" 6.664" 9
10 7.165" 7.174" 8.835" 8.395" 9.050" 16.15 " 53.23 " 21.75 " 19.10 " 10.45 " 8.822" 7.616" 10
11 7.470" 6.478" 8.576" 7.908" 9.242" 16.37 " 38.51 " 55.10 " 30.03 " 10.57 " 8.582" 8.284" 11
12 7.204" 7.121" 8.121" 7.777" 9.551" 15.39 " 27.79 " 687.2 " 17.47 " 10.58 " 8.490" 8.172" 12
13 7.200" 7.661" 8.167" 8.771" 9.908" 14.28 " 25.31 " 471.4 " 16.63 " 10.55 " 8.199" 8.255" 13
14 7.339" 7.051" 8.403" 9.441" 9.881" 13.97 " 25.09 " 213.3 " 15.13 " 14.03 " 7.367" 8.114" 14
15 7.505" 6.145" 8.745" 8.988" 9.779" 14.11 " 19.84 " 115.7 " 13.99 " 12.04 " 7.096" 7.895" 15
16 7.028" 5.733" 8.351" 10.02 " 10.04 " 14.13 " 18.19 " 80.23 " 12.92 " 10.15 " 7.227" 8.347" 16
17 6.833" 5.643" 8.115" 9.389" 10.43 " 13.84 " 17.38 " 51.20 " 13.18 " 9.846" 8.049" 8.075" 17
18 6.651" 5.683" 8.362" 8.539" 10.07 " 13.55 " 16.80 " 33.64 " 12.44 " 9.674" 8.916" 8.309" 18
19 6.263" 7.102" 8.765" 8.515" 10.05 " 15.11 " 16.58 " 25.70 " 11.26 " 9.008" 8.815" 8.885" 19
20 5.920" 6.754" 8.497" 8.992" 10.58 " 18.67 " 16.24 " 20.56 " 10.97 " 8.736" 8.471" 8.868" 20
21 6.131" 6.542" 8.028" 9.355" 10.97 " 26.14 " 15.66 " 17.73 " 11.24 " 9.451" 7.833" 7.938" 21
22 6.849" 6.112" 8.195" 9.299" 16.12 " 18.43 " 16.63 " 16.51 " 11.01 " 9.615" 8.063" 6.871" 22
23 6.625" 7.019" 8.371" 9.224" 44.19 " 16.87 " 17.71 " 15.69 " 11.19 " 10.23 " 8.545" 6.410" 23
24 6.981" 7.153" 8.653" 9.346" 23.95 " 15.04 " 16.27 " 15.56 " 11.18 " 10.38 " 8.593" 6.277" 24
25 7.013" 16.36 " 8.713" 9.591" 20.46 " 14.60 " 16.07 " 15.48 " 11.31 " 9.775" 8.898" 6.450" 25
26 6.620" 17.21 " 8.531" 9.434" 18.12 " 14.26 " 15.11 " 15.16 " 11.98 " 9.644" 8.953" 7.246" 26
27 6.433" 62.21 " 8.853" 9.495" 14.46 " 28.22 " 14.71 " 14.95 " 13.27 " 9.480" 8.810" 7.633" 27
28 5.738" 515.4 " 8.955" 9.200" 13.46 " 29.09 " 14.91 " 14.45 " 11.37 " 9.039" 8.683" 7.272" 28
29 5.671" 8.848" 9.118" 16.54 " 41.68 " 14.67 " 13.97 " 11.66 " 8.810" 8.615" 6.676" 29
30 5.682" 8.907" 9.131" 362.9 " 28.19 " 14.14 " 14.82 " 13.18 " 8.864" 8.628" 6.407" 30
31 5.688" 8.641" 245.3 " 14.36 " 33.42 " 9.055" 6.750" 31
Mean 6.724" 27.68 " 42.43 " 8.872" 31.54 " 25.53 " 36.37 " 69.39 " 14.69 " 10.27 " 8.407" 7.727"
Median 6.849" 7.112" 8.745" 8.990" 10.04 " 18.55 " 18.19 " 18.57 " 13.23 " 9.996" 8.587" 7.938"
Maximum 7.505" 515.4 " 522.0 " 10.02 " 362.9 " 92.44 " 298.3 " 687.2 " 30.03 " 14.03 " 9.235" 9.136"
Minimum 5.671" 5.643" 8.028" 7.777" 8.775" 13.55 " 14.14 " 13.91 " 10.97 " 8.736" 7.096" 6.277"
Total 208.4 " 775.0 "1315 " 266.2 " 977.8 " 765.8 "1128 "2151 " 440.8 " 318.4 " 252.2 " 239.5 "
Summaries ------------------ Notes -------------------
--------- All recorded data is continuous and reliable
except where the following tags are used...
Annual Mean 24.21 " " ... Relative Uncertainty +/-10%
Ann. Median 9.495"
Annual Total 8838 "
Maximum Minimum
Daily 687.2 " 5.643"
Department of Water and Environmental Regulation HYDAY V146 Output 14/05/2026
Site 701009 Irwin River - Mountain Bridge Year 1995
VarFrom 10.00 Stage - SL in Metres Table Type Total
VarTo 151.00 Stream Discharge Volume in Megalitres
Figures are for period ending 24:00
Day Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec Day
1 7.034" 7.811" 14.66 " 8.872" 10.67 " 12.31 " 14.39 " 210.7 " 14.63 " 11.54 " 10.35 " 8.607" 1
2 6.760" 7.554" 9.819" 8.357" 10.06 " 12.42 " 14.40 " 137.1 " 14.64 " 11.30 " 10.58 " 8.383" 2
3 6.828" 7.863" 9.157" 8.644" 9.808" 12.19 " 14.31 " 94.76 " 18.95 " 10.95 " 10.02 " 8.456" 3
4 6.753" 7.942" 8.376" 8.537" 9.738" 11.95 " 14.12 " 69.74 " 22.79 " 11.37 " 9.285" 8.068" 4
5 6.757" 7.429" 7.336" 8.167" 10.12 " 18.38 " 14.17 " 51.63 " 17.70 " 11.44 " 9.197" 7.520" 5
6 6.900" 6.827" 7.182" 8.706" 10.06 " 34.26 " 15.79 " 39.71 " 25.40 " 11.48 " 9.801" 7.694" 6
7 7.482" 6.630" 7.408" 8.964" 10.08 " 30.74 " 14.84 " 32.90 " 23.59 " 11.26 " 10.20 " 8.237" 7
8 8.921" 6.347" 7.490" 9.156" 10.21 " 47.20 " 24.50 " 29.52 " 23.28 " 11.19 " 12.35 " 8.325" 8
9 8.950" 6.151" 7.208" 9.740" 10.38 " 240.3 " 26.24 " 31.10 " 21.11 " 11.51 " 10.53 " 7.806" 9
10 8.145" 6.331" 7.386" 9.654" 12.06 " 152.8 " 33.70 " 31.13 " 17.88 " 11.52 " 9.636" 6.773" 10
11 7.777" 7.089" 7.558" 9.402" 19.76 " 71.75 " 44.06 " 31.90 " 16.40 " 12.34 " 9.345" 5.959" 11
12 7.282" 7.202" 7.481" 9.197" 15.51 " 49.11 " 121.9 " 29.88 " 15.25 " 11.06 " 9.187" 6.764" 12
13 10.43 " 7.460" 7.258" 9.174" 16.87 " 32.61 " 234.0 " 29.03 " 16.79 " 10.38 " 8.818" 8.795" 13
14 29.39 " 7.547" 6.981" 9.798" 13.60 " 24.78 " 182.0 " 26.55 " 14.02 " 9.992" 8.392" 9.851" 14
15 425.1 " 7.306" 7.056" 10.13 " 11.88 " 19.08 " 199.3 " 25.43 " 13.58 " 10.41 " 10.12 " 9.140" 15
16 177.8 " 6.619" 7.750" 9.099" 11.60 " 16.04 " 418.0 " 23.40 " 13.37 " 10.95 " 12.18 " 8.423" 16
17 62.30 " 6.516" 8.218" 9.555" 15.12 " 14.75 " 502.2 " 22.15 " 14.11 " 24.82 " 9.964" 8.293" 17
18 22.60 " 6.684" 7.815" 9.409" 25.70 " 14.23 " 262.5 " 22.18 " 14.29 " 30.27 " 9.376" 8.441" 18
19 12.12 " 6.809" 7.194" 9.217" 29.97 " 13.86 " 157.6 " 22.04 " 13.46 " 14.06 " 9.138" 8.497" 19
20 9.312" 6.961" 7.173" 8.967" 21.07 " 22.06 " 870.8 " 22.65 " 13.07 " 10.16 " 8.812" 8.504" 20
21 8.281" 6.626" 7.227" 12.39 " 15.43 " 17.59 "1350 " 20.85 " 12.71 " 9.971" 8.543" 9.029" 21
22 8.143" 6.552" 7.230" 45.71 " 17.74 " 22.16 " 593.3 " 20.24 " 12.26 " 9.904" 8.362" 9.336" 22
23 8.295" 7.960" 7.643" 12.98 " 21.99 " 24.94 " 312.3 " 19.00 " 12.07 " 9.854" 8.415" 8.478" 23
24 7.730" 12.93 " 7.621" 10.39 " 15.07 " 32.50 " 197.6 " 20.94 " 11.97 " 9.723" 8.720" 8.137" 24
25 7.328" 8.321" 7.883" 9.942" 14.11 " 26.29 " 949.1 " 18.44 " 12.14 " 9.903" 9.089" 8.397" 25
26 7.619" 32.54 " 8.338" 9.716" 13.81 " 19.97 "1290 " 17.87 " 12.30 " 10.17 " 8.974" 8.307" 26
27 7.890" 137.6 " 8.079" 12.86 " 12.64 " 16.65 " 461.3 " 18.07 " 12.79 " 10.50 " 9.137" 7.690" 27
28 7.847" 37.90 " 8.275" 21.84 " 13.09 " 15.48 " 266.1 " 16.65 " 12.69 " 10.31 " 9.077" 7.282" 28
29 7.684" 9.593" 15.63 " 13.31 " 14.73 " 234.4 " 16.20 " 12.47 " 10.24 " 8.689" 7.336" 29
30 7.467" 10.11 " 11.18 " 12.48 " 14.49 " 505.1 " 15.86 " 12.07 " 10.20 " 8.684" 6.769" 30
31 7.845" 9.280" 12.24 " 335.9 " 15.23 " 10.39 " 6.242" 31
Mean 29.83 " 13.98 " 8.122" 11.51 " 14.39 " 35.19 " 312.0 " 38.16 " 15.59 " 11.91 " 9.499" 8.050"
Median 7.847" 7.254" 7.621" 9.482" 13.09 " 19.52 " 199.3 " 23.40 " 14.07 " 10.95 " 9.192" 8.307"
Maximum 425.1 " 137.6 " 14.66 " 45.71 " 29.97 " 240.3 "1350 " 210.7 " 25.40 " 30.27 " 12.35 " 9.851"
Minimum 6.753" 6.151" 6.981" 8.167" 9.738" 11.95 " 14.12 " 15.23 " 11.97 " 9.723" 8.362" 5.959"
Total 924.8 " 391.5 " 251.8 " 345.4 " 446.2 "1056 "9674 "1183 " 467.8 " 369.2 " 285.0 " 249.5 "
Summaries ------------------ Notes -------------------
--------- All recorded data is continuous and reliable
except where the following tags are used...
Annual Mean 42.86 " " ... Relative Uncertainty +/-10%
Ann. Median 10.53 "
Annual Total 15643 "
Maximum Minimum
Daily 1350 " 5.959"
Department of Water and Environmental Regulation HYDAY V146 Output 14/05/2026
Site 701009 Irwin River - Mountain Bridge Year 1996
VarFrom 10.00 Stage - SL in Metres Table Type Total
VarTo 151.00 Stream Discharge Volume in Megalitres
Figures are for period ending 24:00
Day Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec Day
1 6.11" 8.15" 7.92" 9.03" 10.46" 38.78" 318.1 " 5928 " 101.9 " 36.25" 13.56" 11.25" 1
2 6.14" 7.62" 8.57" 14.71" 10.68" 198.4 " 160.7 " 3019 " 95.64" 28.25" 11.86" 11.13" 2
3 6.56" 6.98" 8.75" 10.35" 10.50" 70.64" 124.8 " 1832 " 103.9 " 23.78" 10.64" 9.62" 3
4 7.31" 7.13" 8.64" 10.04" 10.74" 34.40" 840.6 " 1032 " 85.97" 21.59" 9.98" 9.20" 4
5 7.55" 7.35" 8.44" 11.11" 10.88" 23.89" 521.5 " 949.6 " 72.13" 19.62" 9.18" 9.22" 5
6 7.19" 7.70" 8.01" 10.80" 10.57" 17.85" 269.4 " 3252 " 68.28" 18.09" 15.45" 9.06" 6
7 6.90" 8.70" 7.63" 9.16" 10.00" 14.32" 132.7 " 1325 " 61.81" 17.38" 16.96" 8.83" 7
8 7.19" 359.7 " 8.08" 8.85" 12.70" 13.17" 79.49" 710.3 " 60.23" 17.24" 12.23" 9.01" 8
9 7.88" 564.7 " 8.54" 8.95" 15.23" 13.49" 51.85" 482.6 " 57.28" 18.01" 17.40" 9.19" 9
10 7.87" 143.5 " 8.24" 9.06" 12.91" 13.21" 45.18" 376.0 " 60.58" 18.17" 15.22" 9.38" 10
11 7.56" 45.02" 8.01" 10.00" 11.68" 12.91" 53.36" 331.7 " 71.89" 15.92" 10.25" 9.29" 11
12 7.67" 20.06" 7.79" 10.52" 10.30" 12.33" 41.31" 353.4 " 123.3 " 14.64" 10.61" 9.15" 12
13 7.73" 12.87" 7.86" 9.88" 9.87" 12.09" 49.18" 363.3 " 143.9 " 14.66" 11.63" 9.45" 13
14 7.47" 10.70" 8.34" 9.50" 9.87" 11.88" 33.67" 1532 " 88.05" 14.60" 10.66" 9.23" 14
15 6.87" 9.24" 8.57" 9.34" 10.44" 17.00" 50.49" 761.9 " 61.27" 15.04" 14.41" 8.86" 15
16 6.35" 9.05" 8.53" 9.21" 12.47" 21.13" 1832 " 391.4 " 52.02" 14.50" 14.05" 8.48" 16
17 6.59" 9.02" 8.68" 9.11" 11.68" 15.83" 2308 " 265.7 " 50.12" 13.79" 11.69" 8.09" 17
18 7.08" 8.93" 8.59" 9.44" 11.06" 41.16" 1778 " 202.4 " 49.63" 13.85" 10.46" 7.36" 18
19 7.73" 8.72" 8.51" 13.85" 10.17" 165.6 " 1209 " 164.7 " 41.11" 13.56" 10.08" 7.44" 19
20 7.15" 8.57" 7.93" 17.03" 10.13" 73.86" 637.0 " 151.4 " 33.60" 13.02" 10.14" 8.59" 20
21 6.26" 8.57" 8.10" 35.84" 10.27" 237.7 " 365.4 " 1199 " 29.78" 19.59" 10.19" 8.17" 21
22 6.10" 8.54" 8.59" 13.64" 10.45" 362.9 " 243.7 " 1471 " 46.59" 15.95" 10.27" 7.95" 22
23 6.32" 8.79" 8.91" 11.04" 10.39" 195.5 " 184.4 " 694.8 " 47.62" 15.23" 10.07" 7.73" 23
24 6.35" 9.04" 8.85" 10.60" 10.08" 124.4 " 220.5 " 436.2 " 59.40" 14.13" 9.81" 7.72" 24
25 7.03" 9.09" 8.94" 10.77" 9.75" 78.04" 2012 " 449.1 " 48.69" 11.59" 9.37" 7.58" 25
26 7.88" 8.80" 9.03" 10.90" 10.01" 52.37" 1426 " 423.0 " 40.92" 11.36" 9.35" 7.45" 26
27 8.02" 7.91" 9.56" 10.64" 10.43" 124.3 " 808.0 " 276.6 " 63.25" 11.18" 9.40" 7.54" 27
28 8.13" 7.31" 9.45" 10.17" 10.13" 799.7 " 808.1 " 194.0 " 74.40" 11.11" 9.49" 8.00" 28
29 8.53" 7.34" 9.12" 9.71" 9.96" 516.3 " 927.3 " 154.0 " 69.45" 11.17" 9.42" 7.92" 29
30 8.51" 9.23" 9.75" 9.98" 284.5 "15923 $ 130.4 " 49.52" 12.69" 10.40" 7.66" 30
31 8.37" 9.00" 23.26" 18044 $ 115.7 " 14.10" 7.23" 31
Mean 7.239" 46.18 " 8.528" 11.43 " 11.20 " 119.9 "1661 $ 934.4 " 67.07 " 16.45 " 11.47 " 8.605"
Median 7.194" 8.791" 8.572" 10.10 " 10.44 " 39.97 " 318.1 $ 436.2 " 60.92 " 14.66 " 10.43 " 8.586"
Maximum 8.53" 564.7 " 9.56" 35.84" 23.26" 799.7 "18044 $ 5928 " 143.9 " 36.25" 17.40" 11.25"
Minimum 6.105" 6.984" 7.632" 8.849" 9.754" 11.88 " 33.67 $ 115.7 " 29.78 " 11.11 " 9.180" 7.228"
Total 224.4 " 1339 " 264.4 " 343.0 " 347.1 " 3598 "51499 $28968 " 2012 " 510.1 " 344.2 " 266.8 "
Summaries ------------------ Notes -------------------
--------- All recorded data is continuous and reliable
except where the following tags are used...
Annual Mean 245.1 $ " ... Relative Uncertainty +/-10%
Ann. Median 11.12 $ $ ... Relative Uncertainty +/-20%
Annual Total 89716 $
Maximum Minimum
Daily 18044 $ 6.105$
Department of Water and Environmental Regulation HYDAY V146 Output 14/05/2026
Site 701009 Irwin River - Mountain Bridge Year 1997
VarFrom 10.00 Stage - SL in Metres Table Type Total
VarTo 151.00 Stream Discharge Volume in Megalitres
Figures are for period ending 24:00
Day Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec Day
1 6.755" 7.050" 7.056" 10.09 " 22.03 " 22.86 " 14.17 " 17.11 " 17.95 " 16.76 " 9.249" 8.926" 1
2 6.404" 7.577" 7.190" 9.260" 17.66 " 21.72 " 14.28 " 16.56 " 23.36 " 16.46 " 9.071" 8.858" 2
3 6.885" 8.536" 6.972" 9.115" 15.15 " 27.99 " 27.96 " 17.20 " 18.85 " 13.55 " 8.832" 9.120" 3
4 7.131" 8.779" 6.404" 10.03 " 14.57 " 21.61 " 21.44 " 24.64 " 19.30 " 13.11 " 9.616" 9.102" 4
5 7.306" 8.412" 7.247" 10.98 " 13.93 " 19.46 " 17.77 " 56.49 " 23.59 " 12.49 " 10.39 " 8.976" 5
6 6.613" 7.734" 7.925" 18.79 " 13.25 " 17.55 " 105.1 " 381.4 " 59.04 " 12.05 " 9.376" 8.431" 6
7 5.687" 7.479" 8.467" 30.19 " 12.54 " 16.94 " 97.64 " 222.2 " 232.1 " 12.58 " 8.895" 8.159" 7
8 6.237" 7.428" 8.602" 604.6 " 12.65 " 25.77 " 56.42 " 135.5 " 219.6 " 12.79 " 8.898" 8.012" 8
9 6.898" 6.923" 8.563" 586.0 " 12.66 " 46.03 " 39.37 " 109.4 " 143.5 " 22.78 " 9.217" 7.544" 9
10 7.607" 6.899" 8.650" 227.7 " 13.49 " 77.00 " 32.28 " 254.9 " 98.81 " 17.91 " 9.666" 7.629" 10
11 7.938" 6.675" 8.691" 114.8 " 14.26 " 31.10 " 25.61 " 819.3 " 140.6 " 14.32 " 10.06 " 8.220" 11
12 7.886" 6.623" 8.282" 62.11 " 14.94 " 22.58 " 21.24 " 401.1 " 244.7 " 12.76 " 20.97 " 8.602" 12
13 7.696" 7.403" 7.543" 372.3 " 16.58 " 18.97 " 19.44 " 197.9 " 129.0 " 12.40 " 22.66 " 8.399" 13
14 7.071" 7.718" 7.547" 574.9 " 16.68 " 17.58 " 22.33 " 121.5 " 76.08 " 12.04 " 12.55 " 7.818" 14
15 6.494" 7.336" 8.197" 567.2 " 15.12 " 16.91 " 17.10 " 87.29 " 47.79 " 11.97 " 35.90 " 8.043" 15
16 6.125" 7.549" 8.847" 303.8 " 15.24 " 16.56 " 16.14 " 66.16 " 33.81 " 11.55 " 39.63 " 8.495" 16
17 5.959" 7.899" 9.619" 110.6 " 14.63 " 16.19 " 15.61 " 54.55 " 26.37 " 10.92 " 16.93 " 8.530" 17
18 6.833" 8.192" 9.209" 52.66 " 17.84 " 15.09 " 15.64 " 43.64 " 21.45 " 10.18 " 10.25 " 8.536" 18
19 7.606" 8.780" 9.076" 31.70 " 18.89 " 16.21 " 15.60 " 34.85 " 18.99 " 9.836" 9.652" 8.453" 19
20 7.785" 9.155" 9.088" 24.39 " 15.57 " 21.76 " 15.07 " 28.04 " 17.98 " 11.41 " 9.602" 8.357" 20
21 7.918" 9.153" 9.101" 20.65 " 14.30 " 18.31 " 14.69 " 23.65 " 17.05 " 13.03 " 9.677" 8.254" 21
22 7.547" 24.80 " 9.141" 18.40 " 13.87 " 16.67 " 13.98 " 20.54 " 16.28 " 10.92 " 10.09 " 7.751" 22
23 7.846" 23.53 " 9.032" 16.49 " 19.09 " 16.22 " 14.37 " 18.90 " 15.68 " 11.01 " 9.897" 7.214" 23
24 7.758" 14.26 " 9.154" 15.22 " 20.15 " 15.73 " 28.48 " 18.01 " 15.79 " 11.20 " 9.682" 7.457" 24
25 8.466" 31.17 " 9.720" 14.62 " 18.11 " 15.48 " 42.73 " 17.10 " 15.26 " 11.25 " 9.797" 7.511" 25
26 8.156" 10.88 " 9.943" 14.43 " 16.88 " 15.43 " 74.56 " 18.56 " 14.98 " 10.51 " 9.669" 6.666" 26
27 6.925" 8.891" 9.336" 15.27 " 16.37 " 14.97 " 34.25 " 19.99 " 15.19 " 10.07 " 9.394" 7.442" 27
28 6.392" 8.383" 9.326" 14.98 " 15.68 " 14.43 " 26.46 " 21.47 " 14.70 " 9.979" 9.326" 8.251" 28
29 6.903" 9.332" 15.20 " 14.95 " 14.07 " 21.81 " 21.39 " 14.51 " 9.710" 9.131" 7.892" 29
30 7.374" 9.931" 18.19 " 16.84 " 13.97 " 19.05 " 18.22 " 14.52 " 9.144" 9.068" 7.934" 30
31 7.419" 10.24 " 36.58 " 17.36 " 16.92 " 9.001" 8.272" 31
Mean 7.149" 10.19 " 8.627" 129.8 " 16.47 " 21.51 " 29.61 " 106.6 " 58.89 " 12.38 " 12.57 " 8.157"
Median 7.131" 8.046" 8.847" 19.72 " 15.24 " 17.24 " 21.24 " 28.04 " 20.38 " 11.97 " 9.667" 8.251"
Maximum 8.466" 31.17 " 10.24 " 604.6 " 36.58 " 77.00 " 105.1 " 819.3 " 244.7 " 22.78 " 39.63 " 9.120"
Minimum 5.687" 6.623" 6.404" 9.115" 12.54 " 13.97 " 13.98 " 16.56 " 14.51 " 9.001" 8.832" 6.666"
Total 221.6 " 285.2 " 267.4 "3895 " 510.5 " 645.2 " 917.9 "3304 "1767 " 383.7 " 377.2 " 252.9 "
Summaries ------------------ Notes -------------------
--------- All recorded data is continuous and reliable
except where the following tags are used...
Annual Mean 35.14 " " ... Relative Uncertainty +/-10%
Ann. Median 14.07 "
Annual Total 12827 "
Maximum Minimum
Daily 819.3 " 5.687"
Department of Water and Environmental Regulation HYDAY V146 Output 14/05/2026
Site 701009 Irwin River - Mountain Bridge Year 1998
VarFrom 10.00 Stage - SL in Metres Table Type Total
VarTo 151.00 Stream Discharge Volume in Megalitres
Figures are for period ending 24:00
Day Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec Day
1 8.023" 8.071" 7.825" 8.327" 9.635" 30.25 " 54.40 " 508.9 " 43.05 " 17.17 " 11.22 " 9.803" 1
2 7.496" 7.688" 8.082" 8.412" 9.604" 24.75 " 82.85 "2339 " 45.19 " 16.37 " 11.20 " 9.336" 2
3 7.376" 7.465" 8.471" 8.481" 10.03 " 21.04 " 158.6 "4772 " 47.95 " 15.76 " 11.05 " 8.912" 3
4 7.568" 7.512" 8.340" 8.479" 10.20 " 18.98 " 142.2 "2332 " 47.39 " 15.56 " 10.83 " 8.687" 4
5 7.867" 7.268" 7.572" 8.720" 10.39 " 18.28 " 274.1 "1760 " 35.84 " 15.24 " 10.78 " 8.874" 5
6 7.281" 7.105" 7.846" 9.417" 10.40 " 16.79 " 383.5 "1670 " 27.87 " 14.52 " 10.36 " 9.382" 6
7 7.523" 7.185" 8.518" 10.25 " 9.932" 17.33 "1120 "1407 " 22.88 " 14.45 " 9.721" 29.47 " 7
8 7.559" 6.456" 8.561" 10.13 " 9.426" 132.3 " 659.6 "1095 " 20.92 " 14.12 " 9.543" 14.84 " 8
9 7.683" 6.440" 8.470" 10.14 " 10.80 " 528.9 " 284.8 " 649.8 " 19.44 " 14.43 " 9.165" 10.78 " 9
10 7.601" 6.887" 9.773" 10.43 " 29.03 " 335.0 " 175.1 " 377.0 " 18.82 " 14.86 " 8.809" 10.06 " 10
11 7.476" 7.280" 12.16 " 10.33 " 515.3 "1186 " 134.9 " 202.4 " 18.03 " 14.25 " 8.764" 9.677" 11
12 7.560" 7.556" 9.784" 9.874"3846 " 638.9 " 121.9 " 116.3 " 17.60 " 14.45 " 9.143" 8.888" 12
13 8.121" 7.592" 8.815" 9.379" 864.7 " 284.6 " 656.3 " 83.18 " 17.49 " 14.35 " 10.25 " 15.57 " 13
14 8.281" 7.775" 8.146" 9.455" 346.9 " 162.4 " 953.2 " 54.48 $ 16.19 " 14.47 " 10.13 " 22.17 " 14
15 8.322" 7.982" 8.124" 9.728" 159.9 " 105.2 " 594.5 " 55.52 $ 16.25 " 14.12 " 9.184" 10.70 " 15
16 8.653" 7.704" 8.145" 10.10 " 92.57 " 72.00 " 318.8 " 54.94 $ 16.32 " 14.86 " 8.967" 9.931" 16
17 8.367" 7.913" 8.201" 10.64 " 56.02 " 92.08 " 203.3 " 42.86 $ 17.02 " 15.43 " 8.656" 9.682" 17
18 7.669" 8.285" 8.300" 13.79 " 37.59 " 854.8 " 156.2 " 34.91 $ 16.93 " 14.86 " 9.343" 10.01 " 18
19 8.095" 8.505" 8.264" 12.30 " 29.59 "1310 " 278.1 " 37.07 $ 16.18 " 13.54 " 9.450" 9.549" 19
20 8.623" 8.630" 8.590" 10.86 " 24.94 " 461.4 " 324.4 " 43.61 $ 16.20 " 12.77 " 9.209" 8.889" 20
21 8.342" 8.853" 8.933" 10.51 " 23.09 " 229.9 " 215.1 " 39.46 $ 30.22 " 12.35 " 9.193" 8.620" 21
22 8.055" 9.025" 8.737" 10.53 " 20.43 " 144.1 "8676 $ 37.44 $ 26.61 " 12.22 " 9.708" 8.597" 22
23 8.130" 9.230" 8.624" 11.02 " 18.58 " 99.70 "7226 # 31.46 $ 21.65 " 12.60 " 9.520" 8.792" 23
24 8.140" 9.248" 8.405" 10.81 " 18.04 " 73.85 " 712.4 # 28.06 $ 19.10 " 13.10 " 9.176" 9.144" 24
25 7.078" 8.840" 8.371" 10.47 " 17.17 " 58.50 " 601.4 # 25.01 $ 22.41 " 12.49 " 9.453" 9.127" 25
26 6.663" 8.264" 8.418" 11.33 " 31.34 " 60.87 "3007 # 23.19 $ 18.76 " 12.32 " 9.258" 9.055" 26
27 6.328" 7.244" 8.563" 11.08 " 104.4 " 144.3 "3380 " 23.56 $ 17.59 " 12.73 " 8.766" 8.758" 27
28 5.840" 7.189" 8.341" 10.41 " 166.1 " 99.47 "1889 " 57.19 $ 16.52 " 12.48 " 8.881" 8.572" 28
29 6.076" 8.008" 10.27 " 86.21 " 71.38 " 896.0 " 123.8 $ 16.37 " 11.97 " 9.714" 8.421" 29
30 7.448" 8.077" 9.971" 57.09 " 52.93 " 477.2 " 73.12 $ 16.75 " 11.40 " 10.63 " 8.563" 30
31 8.218" 8.182" 39.31 " 333.5 " 47.12 $ 11.12 " 8.925" 31
Mean 7.660" 7.828" 8.537" 10.19 " 215.3 " 244.9 "1113 $ 585.4 $ 23.45 " 13.88 " 9.669" 10.70 "
Median 7.669" 7.696" 8.371" 10.26 " 29.03 " 99.59 " 333.5 $ 57.19 $ 18.79 " 14.25 " 9.451" 9.144"
Maximum 8.653" 9.248" 12.16 " 13.79 "3846 "1310 "8676 $4772 $ 47.95 " 17.17 " 11.22 " 29.47 "
Minimum 5.840" 6.440" 7.572" 8.327" 9.426" 16.79 " 54.40 $ 23.19 $ 16.18 " 11.12 " 8.656" 8.421"
Total 237.5 " 219.2 " 264.7 " 305.6 " 6674 " 7346 "34490 $18146 $ 703.6 " 430.4 " 290.1 " 331.8 "
Summaries ------------------ Notes -------------------
--------- All recorded data is continuous and reliable
except where the following tags are used...
Annual Mean 190.2 $ " ... Relative Uncertainty +/-10%
Ann. Median 11.22 $ # ... Relative Uncertainty +/-15%
Annual Total 69440 $ $ ... Relative Uncertainty +/-20%
Maximum Minimum
Daily 8676 $ 5.840$
Department of Water and Environmental Regulation HYDAY V146 Output 14/05/2026
Site 701009 Irwin River - Mountain Bridge Year 1999
VarFrom 10.00 Stage - SL in Metres Table Type Total
VarTo 151.00 Stream Discharge Volume in Megalitres
Figures are for period ending 24:00
Day Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec Day
1 8.97" 8.58" 8.87" 17.04" 14.55" 960.9 " 252.1 " 189.5 " 54.61" 35.44" 16.81" 14.02" 1
2 8.89" 8.67" 8.88" 16.12" 14.94" 668.2 " 181.7 " 149.3 " 53.97" 30.07" 16.45" 13.94" 2
3 8.71" 8.66" 8.80" 15.98" 15.22" 551.4 " 148.3 " 127.0 " 65.05" 27.03" 16.43" 13.81" 3
4 8.58" 8.34" 8.96" 15.55" 15.55" 487.9 " 130.0 " 108.7 " 74.81" 25.28" 16.49" 13.77" 4
5 8.48" 8.31" 9.10" 15.59" 15.11" 489.3 " 183.9 " 95.38" 80.83" 24.36" 66.84" 13.73" 5
6 8.59" 8.08" 9.23" 15.43" 17.35" 366.6 " 1536 " 89.73" 68.91" 23.42" 33.84" 13.69" 6
7 8.63" 7.63" 9.45" 15.48" 20.70" 288.9 " 1094 " 90.21" 56.26" 28.86" 27.35" 13.64" 7
8 8.73" 7.69" 9.59" 15.94" 18.65" 242.2 " 462.7 " 93.41" 42.87" 50.81" 22.95" 13.35" 8
9 8.81" 8.42" 9.33" 16.61" 16.45" 212.3 " 280.3 " 89.00" 37.29" 86.59" 16.75" 12.79" 9
10 8.86" 8.71" 8.67" 24.83" 15.90" 194.5 " 209.8 " 81.89" 34.70" 63.52" 16.01" 12.55" 10
11 8.73" 8.58" 8.72" 21.71" 15.96" 196.1 " 176.2 " 89.82" 54.82" 43.34" 15.59" 12.31" 11
12 8.84" 8.35" 9.10" 18.01" 16.29" 348.8 " 157.6 " 106.0 " 61.00" 34.63" 15.40" 12.21" 12
13 8.90" 8.59" 9.36" 16.72" 23.30" 351.1 " 202.3 " 93.98" 66.33" 31.39" 15.42" 12.26" 13
14 8.82" 8.62" 9.70" 16.29" 32.53" 279.3 " 300.4 " 80.20" 60.70" 44.84" 16.53" 12.46" 14
15 8.66" 7.91" 9.79" 16.52" 82.94" 222.4 " 351.6 " 71.63" 54.63" 36.17" 16.21" 12.33" 15
16 8.48" 7.39" 10.27" 430.9 " 79.09" 198.0 " 310.8 " 69.74" 53.61" 38.74" 15.80" 12.27" 16
17 8.64" 7.55" 10.17" 752.7 " 46.44" 180.2 " 330.1 " 77.21" 45.20" 30.33" 15.63" 12.22" 17
18 8.71" 7.46" 10.50" 354.1 " 27.30" 240.3 " 274.5 " 129.7 " 37.29" 26.15" 15.23" 12.23" 18
19 7.66" 7.84" 14.26" 172.1 " 28.33" 384.7 " 211.8 " 230.3 " 33.53" 22.88" 15.14" 12.26" 19
20 7.88" 8.43" 211.1 " 96.26" 25.51" 372.7 " 177.0 " 192.0 " 31.00" 21.65" 14.92" 12.77" 20
21 8.31" 8.85" 3313 " 57.12" 22.54" 255.4 " 163.6 " 125.2 " 62.05" 20.94" 14.86" 12.35" 21
22 8.84" 8.84" 569.0 " 38.86" 22.13" 197.1 " 174.2 " 92.30" 833.8 " 20.41" 14.74" 12.29" 22
23 9.22" 8.39" 194.4 " 28.09" 21.73" 449.5 " 175.0 " 74.25" 465.6 " 20.63" 14.45" 12.29" 23
24 9.54" 8.46" 97.42" 22.22" 23.53" 505.3 " 140.4 " 73.92" 224.7 " 21.68" 14.41" 12.29" 24
25 9.26" 8.42" 56.02" 18.57" 26.72" 263.4 " 120.4 " 86.42" 138.8 " 20.17" 14.37" 12.28" 25
26 9.11" 7.97" 36.25" 16.85" 674.0 " 187.4 " 199.0 " 97.75" 93.41" 19.08" 14.37" 12.25" 26
27 9.02" 8.04" 30.91" 15.90"42714 $ 227.0 " 633.6 " 86.56" 69.89" 18.72" 14.28" 12.21" 27
28 9.04" 8.45" 29.41" 15.17"68489 $ 1386 " 420.6 " 74.11" 57.16" 18.85" 14.22" 12.21" 28
29 9.25" 25.02" 14.88"16651 $ 1159 " 672.0 " 69.79" 50.41" 18.75" 14.15" 12.21" 29
30 8.80" 20.78" 14.73" 4790 " 443.4 " 532.9 " 66.65" 42.26" 18.18" 14.09" 15.97" 30
31 8.40" 17.94" 1718 " 281.9 " 59.26" 17.40" 54.35" 31
Mean 8.754" 8.257" 154.3 " 76.88 "4377 $ 410.3 " 338.2 " 102.0 " 103.5 " 30.33 " 18.32 " 14.17 "
Median 8.797" 8.404" 10.17 " 16.79 " 23.30 $ 318.8 " 211.8 " 89.82 " 56.71 " 25.28 " 15.51 " 12.33 "
Maximum 9.54" 8.85" 3313 " 752.7 "68489 $ 1386 " 1536 " 230.3 " 833.8 " 86.59" 66.84" 54.35"
Minimum 7.657" 7.386" 8.673" 14.73 " 14.55 $ 180.2 " 120.4 " 59.26 " 31.00 " 17.40 " 14.09 " 12.21 "
Total 271.4" 231.2" 4784 " 2306 "135693 $ 12309 " 10484 " 3161 " 3105 " 940.3" 549.7" 439.3"
Summaries ------------------ Notes -------------------
--------- All recorded data is continuous and reliable
except where the following tags are used...
Annual Mean 477.5 $ " ... Relative Uncertainty +/-10%
Ann. Median 22.22 $ $ ... Relative Uncertainty +/-20%
Annual Total 174276 $
Maximum Minimum
Daily 68489 $ 7.386$
Department of Water and Environmental Regulation HYDAY V146 Output 14/05/2026
Site 701009 Irwin River - Mountain Bridge Year 2000
VarFrom 10.00 Stage - SL in Metres Table Type Total
VarTo 151.00 Stream Discharge Volume in Megalitres
Figures are for period ending 24:00
Day Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec Day
1 16.52 " 481.5 " 11.49 " 35.15 " 18.02 " 17.74 " 27.09 " 26.58 " 46.35 " 16.39 " 12.85 " 10.67 " 1
2 13.86 " 117.3 " 10.90 " 28.29 " 17.98 " 17.35 " 23.91 " 25.45 " 53.25 " 15.90 " 13.15 " 10.24 " 2
3 13.31 " 47.15 " 11.92 " 23.72 " 17.74 " 17.30 " 22.60 " 23.21 " 44.37 " 15.84 " 13.05 " 10.45 " 3
4 12.96 " 25.61 " 11.15 " 21.92 " 17.37 " 17.17 " 25.27 " 21.10 " 32.73 " 15.73 " 12.88 " 10.24 " 4
5 29.12 " 17.80 " 10.76 " 20.62 " 17.16 " 17.13 " 25.43 " 22.64 " 27.43 " 15.63 " 12.84 " 10.39 " 5
6 108.7 " 16.24 " 10.46 " 115.6 " 17.58 " 17.21 " 24.42 " 58.63 " 33.00 " 16.50 " 13.34 " 10.59 " 6
7 25.38 " 15.67 " 10.28 " 75.87 " 17.25 " 17.42 " 25.67 " 50.48 " 53.95 " 17.12 " 13.69 " 10.89 " 7
8 15.05 " 14.92 " 10.55 " 38.48 " 16.99 " 17.81 " 23.87 " 62.63 " 73.09 " 17.13 " 14.28 " 10.81 " 8
9 13.20 " 14.51 " 15.19 " 27.06 " 17.22 " 17.65 " 22.04 " 35.92 " 45.98 " 16.66 " 14.23 " 10.95 " 9
10 13.04 " 14.19 " 420.5 " 22.33 " 19.98 " 19.18 " 21.52 " 29.46 " 32.09 " 16.14 " 13.44 " 11.02 " 10
11 13.05 " 13.81 "1738 " 19.99 " 28.41 " 20.87 " 25.63 " 26.02 " 25.40 " 15.72 " 12.50 " 10.26 " 11
12 13.06 " 13.53 " 804.4 " 19.11 " 23.60 " 18.53 " 23.72 " 22.88 " 20.96 " 15.51 " 12.37 " 9.963" 12
13 13.01 " 13.22 " 370.0 " 19.13 " 20.08 " 17.44 " 33.38 " 20.51 " 19.80 " 15.29 " 12.64 " 10.32 " 13
14 13.15 " 12.96 " 200.4 " 18.40 " 19.58 " 20.97 " 32.29 " 19.98 " 19.05 " 15.09 " 11.59 " 10.46 " 14
15 13.40 " 12.73 " 110.7 " 18.23 " 18.70 " 29.68 " 48.16 " 20.73 " 18.67 " 14.94 " 11.59 " 10.000" 15
16 13.60 " 12.53 " 69.36 " 18.04 " 17.90 " 18.61 " 52.25 " 27.69 " 18.38 " 14.83 " 11.92 " 10.06 " 16
17 13.14 " 12.35 " 45.39 " 18.17 " 16.71 " 17.56 " 56.97 " 31.52 " 17.99 " 14.72 " 12.59 " 10.24 " 17
18 13.07 " 12.17 " 30.82 " 17.10 " 16.39 " 17.80 " 57.30 " 32.93 " 17.79 " 14.62 " 12.06 " 10.13 " 18
19 13.00 " 12.00 " 25.33 " 16.12 " 16.44 " 23.06 " 59.59 " 27.43 " 17.71 " 14.47 " 10.88 " 10.82 " 19
20 12.98 " 11.76 " 23.52 " 16.63 " 16.58 " 21.36 " 51.78 " 23.25 " 17.63 " 14.35 " 10.20 " 11.98 " 20
21 12.88 " 11.56 " 65.21 " 15.88 " 16.41 " 20.64 " 42.59 " 21.19 " 17.55 " 14.18 " 10.54 " 10.80 " 21
22 13.07 " 11.39 "1102 " 15.64 " 16.73 " 18.83 " 37.19 " 18.72 " 17.52 " 14.09 " 10.56 " 10.05 " 22
23 13.40 " 11.24 " 594.4 " 15.01 " 17.21 " 18.27 " 34.39 " 17.26 " 17.64 " 14.12 " 10.93 " 10.26 " 23
24 13.22 " 11.11 " 212.5 " 14.77 " 17.08 " 18.86 " 31.77 " 19.81 " 18.39 " 14.10 " 11.67 " 10.21 " 24
25 12.88 " 10.98 " 115.5 " 15.23 " 17.23 " 19.62 " 29.28 " 19.99 " 19.20 " 14.03 " 11.54 " 9.705" 25
26 12.87 " 10.82 " 317.3 " 18.01 " 17.32 " 19.49 " 27.24 " 20.30 " 20.15 " 13.60 " 11.98 " 9.454" 26
27 12.77 " 11.15 " 383.4 " 25.47 " 16.61 " 18.74 " 25.08 " 21.98 " 21.59 " 13.02 " 13.02 " 9.151" 27
28 12.74 " 11.13 " 226.4 " 19.31 " 16.58 " 19.06 " 25.22 " 22.00 " 22.48 " 12.84 " 11.94 " 9.699" 28
29 12.72 " 11.28 " 148.0 " 20.08 " 16.83 " 19.11 " 26.97 " 28.22 " 21.40 " 12.87 " 11.46 " 11.08 " 29
30 12.76 " 82.60 " 18.01 " 16.64 " 18.68 " 26.25 " 27.90 " 18.17 " 13.01 " 10.97 " 10.84 " 30
31 67.96 " 51.20 " 17.24 " 26.63 " 36.04 " 13.14 " 10.68 " 31
Mean 19.03 " 34.23 " 233.5 " 25.58 " 17.99 " 19.11 " 32.76 " 27.82 " 27.66 " 14.89 " 12.22 " 10.40 "
Median 13.07 " 12.73 " 69.36 " 19.12 " 17.23 " 18.65 " 26.97 " 23.25 " 20.56 " 14.83 " 12.22 " 10.32 "
Maximum 108.7 " 481.5 "1738 " 115.6 " 28.41 " 29.68 " 59.59 " 62.63 " 73.09 " 17.13 " 14.28 " 11.98 "
Minimum 12.72 " 10.82 " 10.28 " 14.77 " 16.39 " 17.13 " 21.52 " 17.26 " 17.52 " 12.84 " 10.20 " 9.151"
Total 589.8 " 992.6 "7240 " 767.4 " 557.6 " 573.2 "1016 " 862.5 " 829.7 " 461.6 " 366.7 " 322.4 "
Summaries ------------------ Notes -------------------
--------- All recorded data is continuous and reliable
except where the following tags are used...
Annual Mean 39.83 " " ... Relative Uncertainty +/-10%
Ann. Median 17.31 "
Annual Total 14578 "
Maximum Minimum
Daily 1738 " 9.151"
Department of Water and Environmental Regulation HYDAY V146 Output 14/05/2026
Site 701009 Irwin River - Mountain Bridge Year 2001
VarFrom 10.00 Stage - SL in Metres Table Type Total
VarTo 151.00 Stream Discharge Volume in Megalitres
Figures are for period ending 24:00
Day Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec Day
1 10.90 " 13.01 " 11.13 " 11.86 " 14.60 " 27.49 " 18.85 " 248.4 " 19.96 " 32.28 " 14.55 $ 11.29 $ 1
2 10.72 " 11.52 " 11.15 " 11.43 " 14.89 " 25.62 " 18.91 " 144.3 " 19.78 " 38.42 " 15.10 $ 11.65 $ 2
3 10.50 " 10.62 " 10.96 " 12.15 " 15.22 " 21.94 " 21.22 " 83.52 " 19.65 " 29.05 " 15.55 $ 11.57 $ 3
4 10.62 " 10.34 " 10.52 " 12.57 " 14.92 " 20.62 " 25.40 " 56.95 " 19.47 " 23.16 " 14.56 $ 12.30 $ 4
5 11.05 " 10.15 " 10.35 " 12.03 " 14.50 " 19.77 " 21.97 " 39.72 " 19.19 " 20.69 " 13.60 $ 12.90 $ 5
6 11.58 " 10.71 " 9.803" 12.63 " 30.51 " 18.98 " 21.87 " 33.19 " 19.75 " 23.32 " 13.37 $ 11.69 $ 6
7 12.02 " 11.59 " 10.71 " 12.99 " 33.18 " 18.92 " 25.04 " 29.46 " 21.26 " 22.55 " 13.75 $ 11.33 $ 7
8 12.01 " 10.83 " 11.87 " 12.38 " 22.09 " 19.44 " 44.13 " 26.86 " 21.27 " 20.55 " 14.05 $ 10.85 $ 8
9 12.13 " 10.35 " 11.77 " 12.56 " 18.00 " 20.35 " 43.22 " 25.80 " 21.14 " 19.59 " 14.20 $ 10.49 $ 9
10 11.92 " 9.892" 10.33 " 13.30 " 18.33 " 22.55 " 92.95 " 25.71 " 21.96 " 18.89 " 13.80 $ 10.31 $ 10
11 11.37 " 12.40 " 10.09 " 13.40 " 24.54 " 34.09 " 74.86 " 25.47 " 22.25 " 18.10 " 12.64 $ 10.38 $ 11
12 11.60 " 14.49 " 9.909" 13.70 " 20.93 " 26.01 " 38.58 " 25.36 " 21.98 " 17.72 " 12.01 $ 10.27 $ 12
13 11.35 " 10.88 " 10.17 " 13.38 " 23.23 " 21.27 " 29.03 " 25.11 " 21.77 " 17.43 " 12.32 $ 10.44 $ 13
14 10.68 " 9.577" 10.91 " 14.01 " 22.84 " 20.11 " 25.78 " 24.84 " 21.42 " 17.11 " 12.20 $ 10.73 $ 14
15 10.38 " 9.611" 11.54 " 13.99 " 18.47 " 19.98 " 23.56 " 24.80 " 21.08 " 16.94 " 12.79 $ 10.90 $ 15
16 10.62 " 10.12 " 12.07 " 13.97 " 17.48 " 22.93 " 22.37 " 24.77 " 20.74 " 17.13 " 15.11 $ 10.74 $ 16
17 11.59 " 11.85 " 11.85 " 14.27 " 16.88 " 24.32 " 20.93 " 24.99 " 20.43 " 16.95 " 21.70 $ 11.13 $ 17
18 12.11 " 12.68 " 12.04 " 14.19 " 16.54 " 20.72 " 19.94 " 25.13 " 20.18 " 16.67 $ 16.59 $ 10.71 $ 18
19 11.60 " 11.88 " 12.33 " 13.77 " 17.15 " 20.02 " 19.10 " 24.93 " 19.85 " 17.58 $ 15.25 $ 10.17 $ 19
20 10.89 " 11.46 " 11.33 " 13.27 " 19.47 " 19.37 " 19.64 " 24.42 " 19.51 " 18.58 $ 13.70 $ 9.795$ 20
21 12.66 " 10.94 " 10.94 " 12.70 " 18.98 " 19.05 " 19.89 " 23.75 " 19.15 " 18.94 $ 12.20 $ 10.79 $ 21
22 12.10 " 11.98 " 11.56 " 13.02 " 17.63 " 18.74 " 19.47 " 22.96 " 19.06 " 19.62 $ 11.53 $ 10.13 $ 22
23 11.41 " 13.02 " 11.72 " 14.92 " 17.47 " 18.50 " 18.86 " 22.27 " 19.44 " 20.95 $ 11.66 $ 9.995$ 23
24 10.43 " 13.65 " 11.25 " 16.46 " 18.30 " 18.50 " 18.54 " 21.95 " 19.27 " 23.47 $ 12.06 $ 10.15 $ 24
25 10.18 " 12.62 " 11.41 " 14.86 " 19.80 " 18.56 " 18.10 " 22.04 " 18.97 " 23.13 $ 12.67 $ 10.21 $ 25
26 10.30 " 11.64 " 11.73 " 14.76 " 18.16 " 18.55 " 17.89 " 21.66 " 18.68 " 19.68 $ 11.71 $ 10.12 $ 26
27 10.46 " 10.54 " 11.74 " 14.41 " 17.47 " 18.64 " 17.86 " 21.23 " 18.41 " 17.88 $ 10.48 $ 11.40 $ 27
28 10.64 " 10.45 " 11.62 " 14.32 " 17.37 " 18.41 " 37.23 " 20.77 " 18.28 " 16.45 $ 10.28 $ 11.88 $ 28
29 11.36 " 11.63 " 14.79 " 23.19 " 18.20 " 54.14 " 20.43 " 19.59 " 15.02 $ 10.65 $ 10.29 $ 29
30 10.49 " 11.91 " 14.35 " 40.00 " 18.57 " 139.6 " 20.29 " 24.00 " 13.78 $ 10.49 $ 10.12 $ 30
31 11.10 " 12.46 " 36.77 " 256.6 " 20.16 " 13.75 $ 10.33 $ 31
Mean 11.19 " 11.39 " 11.25 " 13.55 " 20.61 " 21.01 " 40.18 " 38.75 " 20.25 " 20.17 $ 13.35 $ 10.81 $
Median 11.10 " 11.20 " 11.41 " 13.55 " 18.30 " 19.87 " 21.97 " 24.93 " 19.81 " 18.89 $ 13.08 $ 10.71 $
Maximum 12.66 " 14.49 " 12.46 " 16.46 " 40.00 " 34.09 " 256.6 " 248.4 " 24.00 " 38.42 $ 21.70 $ 12.90 $
Minimum 10.18 " 9.577" 9.803" 11.43 " 14.50 " 18.20 " 17.86 " 20.16 " 18.28 " 13.75 $ 10.28 $ 9.795$
Total 346.8 " 318.8 " 348.8 " 406.4 " 638.9 " 630.2 "1246 "1201 " 607.5 " 625.4 $ 400.6 $ 335.1 $
Summaries ------------------ Notes -------------------
--------- All recorded data is continuous and reliable
except where the following tags are used...
Annual Mean 19.47 $ " ... Relative Uncertainty +/-10%
Ann. Median 15.11 $ $ ... Relative Uncertainty +/-20%
Annual Total 7105 $
Maximum Minimum
Daily 256.6 $ 9.577$
Department of Water and Environmental Regulation HYDAY V146 Output 14/05/2026
Site 701009 Irwin River - Mountain Bridge Year 2002
VarFrom 10.00 Stage - SL in Metres Table Type Total
VarTo 151.00 Stream Discharge Volume in Megalitres
Figures are for period ending 24:00
Day Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec Day
1 10.02 $ 10.88 $ 10.46 $ 11.32 $ 13.16 $ 14.34 $ 20.62 $ 20.67 " 24.86 " 15.74 " 15.57 " 10.89 " 1
2 9.616$ 11.98 $ 10.21 $ 11.32 $ 14.09 $ 14.75 $ 20.09 $ 20.88 " 30.53 " 15.41 " 14.29 " 10.77 " 2
3 9.352$ 10.75 $ 10.46 $ 11.68 $ 15.89 $ 15.07 $ 18.12 $ 21.18 " 27.74 " 15.17 " 13.49 " 10.66 " 3
4 9.166$ 10.06 $ 11.09 $ 11.82 $ 19.28 $ 15.68 $ 19.89 $ 23.23 " 26.83 " 15.09 " 13.37 " 10.45 " 4
5 10.16 $ 10.27 $ 11.05 $ 11.64 $ 17.93 $ 16.03 $ 22.62 $ 27.91 " 23.62 " 19.07 " 13.68 " 9.996" 5
6 11.19 $ 10.19 $ 11.35 $ 11.60 $ 15.96 $ 16.75 $ 27.15 $ 23.26 " 21.59 " 24.07 " 14.00 " 10.53 " 6
7 10.66 $ 9.696$ 11.55 $ 11.76 $ 19.66 $ 17.50 $ 22.50 $ 21.18 " 20.56 " 19.92 " 13.44 " 11.39 " 7
8 10.76 $ 9.444$ 11.89 $ 12.35 $ 21.38 $ 23.78 $ 29.47 $ 20.56 " 19.88 " 18.06 " 13.16 " 11.20 " 8
9 10.91 $ 9.147$ 18.98 $ 12.21 $ 20.38 $ 26.80 $ 36.07 $ 32.60 " 19.48 " 16.77 " 12.96 " 10.23 " 9
10 10.62 $ 9.741$ 14.87 $ 11.37 $ 18.46 $ 18.87 $ 27.86 $ 47.47 " 19.13 " 16.30 " 13.56 " 9.563" 10
11 10.51 $ 11.10 $ 13.24 $ 11.82 $ 17.29 $ 17.30 $ 28.77 $ 30.13 " 18.89 " 16.17 " 15.13 " 9.542" 11
12 10.69 $ 10.81 $ 12.95 $ 12.69 $ 20.94 $ 16.70 $ 60.04 $ 25.10 " 18.72 " 15.93 " 13.66 " 10.12 " 12
13 11.23 $ 10.68 $ 12.51 $ 12.09 $ 22.71 $ 17.20 $ 62.03 $ 22.49 " 18.53 " 15.76 " 12.28 " 11.14 " 13
14 11.72 $ 10.91 $ 11.96 $ 12.41 $ 19.39 $ 21.91 $ 37.28 $ 21.57 " 19.09 " 15.76 " 11.37 " 11.27 " 14
15 12.16 $ 10.71 $ 11.55 $ 12.62 $ 16.41 $ 18.19 $ 29.42 $ 27.74 " 27.12 " 15.44 " 11.25 " 11.43 " 15
16 11.82 $ 10.50 $ 11.13 $ 12.89 $ 15.34 $ 17.05 $ 23.45 $ 29.97 " 23.65 " 15.61 " 12.56 " 11.40 " 16
17 12.35 $ 10.62 $ 11.15 $ 12.35 $ 14.87 $ 16.48 $ 19.09 $ 23.12 " 19.73 " 16.42 " 11.89 " 11.48 " 17
18 11.62 $ 11.07 $ 11.55 $ 12.63 $ 17.12 $ 16.01 $ 19.19 " 21.39 " 18.80 " 19.80 " 11.77 " 11.10 " 18
19 11.34 $ 11.59 $ 11.57 $ 13.39 $ 17.42 $ 15.79 $ 19.69 " 20.76 " 18.41 " 17.20 " 11.53 " 10.87 " 19
20 11.70 $ 12.04 $ 11.77 $ 13.48 $ 15.35 $ 19.76 $ 20.25 " 20.54 " 18.54 " 15.84 " 11.02 " 11.01 " 20
21 11.09 $ 11.99 $ 11.63 $ 13.57 $ 15.03 $ 20.93 $ 26.15 " 20.57 " 18.46 " 14.95 " 10.73 " 11.27 " 21
22 10.57 $ 12.15 $ 11.32 $ 13.53 $ 14.97 $ 18.32 $ 27.93 " 20.29 " 18.22 " 14.62 " 11.73 " 10.76 " 22
23 10.34 $ 11.89 $ 11.30 $ 14.02 $ 14.59 $ 17.41 $ 50.50 " 19.86 " 18.73 " 14.34 " 13.05 " 16.78 " 23
24 10.79 $ 11.37 $ 12.03 $ 13.96 $ 14.49 $ 16.73 $ 34.40 " 19.84 " 18.06 " 14.68 " 12.22 " 675.1 " 24
25 12.12 $ 11.61 $ 11.94 $ 14.01 $ 14.37 $ 16.18 $ 33.71 " 23.87 " 17.64 " 14.65 " 11.58 " 253.0 " 25
26 11.92 $ 11.32 $ 11.88 $ 14.32 $ 14.32 $ 15.77 $ 24.53 " 21.93 " 17.24 " 14.84 " 10.97 " 104.1 " 26
27 11.13 $ 10.67 $ 12.38 $ 14.12 $ 14.73 $ 15.67 $ 26.35 " 21.67 " 17.00 " 15.35 " 10.57 " 56.33 " 27
28 11.40 $ 10.37 $ 11.62 $ 13.71 $ 14.77 $ 15.95 $ 23.06 " 20.22 " 16.26 " 15.52 " 10.58 " 33.21 " 28
29 12.77 $ 10.95 $ 13.14 $ 14.21 $ 16.57 $ 20.81 " 19.95 " 15.50 " 14.69 " 10.88 " 553.9 " 29
30 10.81 $ 11.38 $ 12.70 $ 14.57 $ 16.32 $ 21.14 " 20.35 " 15.53 " 14.09 " 10.63 " 334.2 " 30
31 10.13 $ 11.76 $ 14.49 $ 21.21 " 21.42 " 14.34 " 137.0 " 31
Mean 10.99 $ 10.84 $ 11.92 $ 12.68 $ 16.57 $ 17.53 $ 28.17 $ 23.60 " 20.28 " 16.18 " 12.43 " 77.44 "
Median 10.91 $ 10.78 $ 11.57 $ 12.63 $ 15.35 $ 16.71 $ 24.53 $ 21.42 " 18.85 " 15.61 " 12.25 " 11.20 "
Maximum 12.77 $ 12.15 $ 18.98 $ 14.32 $ 22.71 $ 26.80 $ 62.03 $ 47.47 " 30.53 " 24.07 " 15.57 " 675.1 "
Minimum 9.166$ 9.147$ 10.21 $ 11.32 $ 13.16 $ 14.34 $ 18.12 $ 19.84 " 15.50 " 14.09 " 10.57 " 9.542"
Total 340.7 $ 303.6 $ 369.5 $ 380.5 $ 513.6 $ 525.8 $ 873.4 $ 731.7 " 608.3 " 501.6 " 372.9 "2401 "
Summaries ------------------ Notes -------------------
--------- All recorded data is continuous and reliable
except where the following tags are used...
Annual Mean 21.70 $ " ... Relative Uncertainty +/-10%
Ann. Median 14.65 $ $ ... Relative Uncertainty +/-20%
Annual Total 7922 $
Maximum Minimum
Daily 675.1 $ 9.147$
Department of Water and Environmental Regulation HYDAY V146 Output 14/05/2026
Site 701009 Irwin River - Mountain Bridge Year 2003
VarFrom 10.00 Stage - SL in Metres Table Type Total
VarTo 151.00 Stream Discharge Volume in Megalitres
Figures are for period ending 24:00
Day Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec Day
1 72.34 " 10.92 " 10.23 " 19.01 " 13.87 " 20.34 " 53.73 " 21.98 " 35.51 " 31.07 " 15.31 " 13.99 " 1
2 39.42 " 12.08 " 10.57 " 16.29 " 13.97 " 25.44 " 44.83 " 22.64 " 31.63 " 28.56 " 14.76 " 14.20 " 2
3 27.30 " 12.83 " 10.73 " 14.85 " 13.91 " 24.60 " 45.13 " 23.68 " 29.09 " 27.68 " 14.61 " 13.93 " 3
4 22.32 " 11.70 " 10.37 " 14.22 " 13.73 " 22.40 " 42.94 " 28.46 " 29.41 " 24.98 " 14.95 " 12.83 " 4
5 19.56 " 11.57 " 10.42 " 14.09 " 13.64 " 20.04 " 40.75 " 29.48 " 27.88 " 24.69 " 15.28 " 11.98 " 5
6 17.89 " 11.54 " 10.59 " 14.37 " 14.44 " 19.03 " 39.66 " 33.29 " 26.51 " 22.98 " 14.95 " 12.39 " 6
7 16.04 " 11.49 " 10.40 " 14.23 " 14.83 " 18.73 " 40.29 " 32.88 " 33.43 " 21.24 " 14.68 " 12.73 " 7
8 13.96 " 11.18 " 10.29 " 13.88 " 15.91 " 18.04 " 44.46 " 28.71 " 48.59 " 20.44 " 14.55 " 13.04 " 8
9 13.63 " 11.23 " 10.50 " 14.24 " 25.05 " 17.61 " 38.32 " 25.70 " 71.84 " 19.85 " 14.55 " 12.56 " 9
10 14.02 " 11.45 " 10.86 " 14.76 " 76.98 " 17.54 " 31.69 " 23.95 " 65.52 " 19.46 " 14.30 " 12.26 " 10
11 14.75 " 11.40 " 10.86 " 16.29 " 61.05 " 17.65 " 31.66 " 31.07 " 53.36 " 20.06 " 13.80 " 12.28 " 11
12 14.16 " 11.89 " 11.42 " 17.95 " 29.01 " 17.11 " 29.31 " 411.4 " 43.11 " 19.83 " 13.86 " 12.24 " 12
13 12.96 " 11.91 " 11.50 " 17.47 " 22.48 " 16.58 " 29.31 " 368.1 " 38.89 " 20.74 " 15.06 " 12.37 " 13
14 11.98 " 12.01 " 11.13 " 17.95 " 19.83 " 16.54 " 32.08 " 169.5 " 34.51 " 21.70 " 15.13 " 12.54 " 14
15 11.73 " 12.83 " 11.27 " 16.63 " 20.66 " 16.55 " 47.05 " 102.0 " 31.37 " 20.46 " 14.94 " 12.84 " 15
16 12.09 " 14.27 " 11.55 " 15.96 " 32.29 " 16.51 " 40.15 " 76.27 " 28.89 " 19.39 " 15.32 " 12.57 " 16
17 12.92 " 13.53 " 11.64 " 15.82 " 225.1 " 16.41 " 42.94 " 83.27 " 26.99 " 18.95 " 18.96 " 12.54 " 17
18 12.86 " 13.12 " 11.77 " 15.68 " 160.4 " 16.27 " 36.03 " 76.97 " 25.66 " 18.89 " 19.71 " 12.88 " 18
19 12.70 " 13.03 " 11.61 " 15.62 " 80.19 " 16.12 " 30.37 " 71.88 " 24.70 " 18.35 " 18.14 " 13.65 " 19
20 12.58 " 12.82 " 11.44 " 15.94 " 53.38 " 16.03 " 27.45 " 81.09 " 24.71 " 17.98 " 16.66 " 13.43 " 20
21 12.30 " 12.68 " 11.47 " 15.91 " 43.20 " 16.09 " 25.34 " 186.6 " 25.06 " 17.83 " 15.24 " 12.75 " 21
22 12.22 " 12.81 " 11.76 " 15.35 " 38.46 " 18.46 " 24.53 " 381.6 " 27.37 " 17.74 " 13.95 " 11.90 " 22
23 12.49 " 13.03 " 12.82 " 14.62 " 29.92 " 22.37 " 23.73 " 971.4 " 28.88 " 17.64 " 13.60 " 11.42 " 23
24 13.01 " 12.31 " 12.93 " 15.64 " 25.51 " 23.46 " 22.49 " 536.0 " 29.15 " 17.48 " 14.49 " 11.54 " 24
25 12.64 " 11.75 " 12.60 " 17.42 " 22.79 " 21.10 " 21.87 " 255.9 " 29.69 " 17.34 " 14.95 " 11.55 " 25
26 11.79 " 11.26 " 12.41 " 16.57 " 21.23 " 25.19 " 21.49 " 152.9 " 27.53 " 17.30 " 15.61 " 11.37 " 26
27 11.33 " 10.77 " 12.91 " 15.23 " 20.19 " 30.82 " 21.57 " 102.4 " 25.22 " 17.40 " 14.75 " 11.35 " 27
28 11.69 " 10.19 " 13.55 " 14.51 " 19.17 " 28.47 " 21.53 " 76.22 " 23.98 " 17.11 " 13.72 " 11.88 " 28
29 11.69 " 14.28 " 14.28 " 18.29 " 36.10 " 21.05 " 61.20 " 23.86 " 16.72 " 13.33 " 12.02 " 29
30 11.22 " 26.14 " 14.12 " 18.06 " 59.55 " 22.01 " 49.61 " 29.46 " 16.52 " 13.70 " 12.21 " 30
31 10.78 " 25.41 " 20.13 " 22.50 " 41.11 " 16.04 " 12.36 " 31
Mean 16.66 " 12.06 " 12.43 " 15.63 " 38.63 " 21.71 " 32.78 " 147.0 " 33.39 " 20.21 " 15.10 " 12.50 "
Median 12.86 " 11.90 " 11.47 " 15.63 " 21.23 " 18.60 " 31.66 " 76.22 " 29.12 " 19.39 " 14.85 " 12.39 "
Maximum 72.34 " 14.27 " 26.14 " 19.01 " 225.1 " 59.55 " 53.73 " 971.4 " 71.84 " 31.07 " 19.71 " 14.20 "
Minimum 10.78 " 10.19 " 10.23 " 13.88 " 13.64 " 16.03 " 21.05 " 21.98 " 23.86 " 16.04 " 13.33 " 11.35 "
Total 516.3 " 337.6 " 385.4 " 468.9 "1198 " 651.2 "1016 "4557 "1002 " 626.4 " 452.9 " 387.6 "
Summaries ------------------ Notes -------------------
--------- All recorded data is continuous and reliable
except where the following tags are used...
Annual Mean 31.78 " " ... Relative Uncertainty +/-10%
Ann. Median 16.63 "
Annual Total 11599 "
Maximum Minimum
Daily 971.4 " 10.19 "
Department of Water and Environmental Regulation HYDAY V146 Output 14/05/2026
Site 701009 Irwin River - Mountain Bridge Year 2004
VarFrom 10.00 Stage - SL in Metres Table Type Total
VarTo 151.00 Stream Discharge Volume in Megalitres
Figures are for period ending 24:00
Day Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec Day
1 12.22 " 11.47 " 11.38 " 11.34 " 13.23 " 26.48 " 19.35 " 21.60 " 24.95 " 41.89 " 15.79 " 13.89 " 1
2 12.05 " 11.11 " 11.61 " 11.33 " 13.25 " 91.13 " 19.67 " 22.44 " 23.18 " 33.08 " 15.53 " 14.54 " 2
3 11.93 " 10.69 " 11.51 " 11.60 " 13.24 " 105.6 " 21.40 " 22.65 " 21.85 " 28.39 " 15.88 " 14.25 " 3
4 12.09 " 10.75 " 11.37 " 11.85 " 13.37 " 55.59 " 20.97 " 22.53 " 21.50 " 25.61 " 16.14 " 13.35 " 4
5 12.66 " 11.15 " 11.26 " 12.44 " 13.39 " 38.74 " 19.93 " 22.31 " 24.27 " 23.69 " 15.50 " 12.64 " 5
6 12.53 " 11.20 " 11.16 " 12.60 " 13.23 " 31.43 " 19.38 " 22.66 " 31.69 " 23.48 " 15.08 " 12.23 " 6
7 11.77 " 11.07 " 11.26 " 12.32 " 13.76 " 25.51 " 81.92 " 22.70 " 32.56 " 22.76 # 13.98 " 12.12 " 7
8 10.92 " 11.27 " 11.61 " 12.55 " 15.67 " 23.46 " 164.2 " 21.63 " 28.99 " 22.32 # 14.03 " 11.22 " 8
9 10.38 " 11.60 " 11.51 " 13.69 " 16.24 " 22.50 " 214.3 " 21.22 " 27.31 " 21.75 # 14.91 " 11.14 " 9
10 10.20 " 12.20 " 11.33 " 14.21 " 18.00 " 20.90 " 118.2 " 20.71 " 24.82 " 21.38 # 15.78 " 11.94 " 10
11 9.974" 12.73 " 11.29 " 13.83 " 19.30 " 43.07 " 87.72 " 20.37 " 22.24 " 20.87 # 15.76 " 12.51 " 11
12 10.07 " 12.45 " 11.42 " 13.37 " 18.44 " 42.72 " 64.23 " 23.56 " 20.70 " 20.50 # 15.79 " 12.23 " 12
13 10.72 " 12.49 " 11.55 " 13.38 " 16.74 " 39.30 " 48.52 " 25.55 " 19.89 " 19.72 # 15.25 " 11.99 " 13
14 10.98 " 12.84 " 11.51 " 13.53 " 15.53 " 42.79 " 37.50 " 24.42 " 19.53 " 18.86 # 14.04 " 11.68 " 14
15 10.94 " 11.99 " 11.42 " 13.32 " 15.10 " 33.92 " 31.52 " 27.36 " 19.47 " 18.61 " 13.45 " 11.72 " 15
16 11.39 " 11.21 " 11.87 " 12.98 " 18.44 " 29.05 " 28.06 " 27.16 " 19.52 " 18.34 " 13.88 " 12.11 " 16
17 11.17 " 10.90 " 12.31 " 12.78 " 22.32 " 25.54 " 25.70 " 26.51 " 19.53 " 18.07 " 14.53 " 12.14 " 17
18 10.90 " 10.66 " 12.35 " 13.26 " 19.94 " 23.17 " 24.01 " 24.96 " 19.48 " 17.65 " 14.26 " 11.96 " 18
19 11.28 " 10.86 " 12.18 " 13.67 " 17.70 " 21.46 " 22.93 " 23.65 " 19.37 " 17.48 " 13.35 " 11.45 " 19
20 11.43 " 11.24 " 11.67 " 13.70 " 16.63 " 20.21 " 22.61 " 23.05 " 19.17 " 17.72 " 12.64 " 11.35 " 20
21 11.54 " 11.22 " 11.64 " 13.74 " 16.55 " 19.29 " 24.48 " 22.95 " 19.01 " 17.93 " 12.23 " 11.80 " 21
22 11.36 " 11.09 " 11.89 " 13.82 " 20.65 " 18.97 " 26.05 " 22.29 " 18.78 " 17.46 " 12.46 " 11.84 " 22
23 11.43 " 11.00 " 11.77 " 13.59 " 59.88 " 20.04 " 25.91 " 21.99 " 24.61 " 16.52 " 12.53 " 11.84 " 23
24 11.83 " 10.95 " 11.94 " 13.25 " 135.6 " 19.69 " 25.76 " 23.59 " 35.41 " 16.20 " 12.79 " 11.59 " 24
25 12.20 " 11.19 " 11.78 " 13.41 " 187.4 " 18.77 " 24.81 " 25.91 " 464.7 " 16.08 " 14.00 " 11.06 " 25
26 12.38 " 11.41 " 11.58 " 13.39 " 159.5 " 18.19 " 23.42 " 26.74 " 399.1 " 15.60 " 14.74 " 11.08 " 26
27 12.22 " 11.78 " 11.41 " 13.17 " 75.60 " 18.03 " 22.11 " 33.42 " 194.2 " 14.92 " 14.37 " 11.39 " 27
28 12.25 " 11.95 " 11.45 " 12.89 " 41.88 " 20.09 " 21.39 " 43.45 " 110.6 " 14.97 " 13.59 " 11.56 " 28
29 12.38 " 11.39 " 11.20 " 12.56 " 28.85 " 20.85 " 21.04 " 40.00 " 77.32 " 15.37 " 13.33 " 13.03 " 29
30 12.79 " 11.28 " 12.68 " 23.86 " 19.83 " 21.04 " 33.11 " 56.33 " 15.68 " 13.45 " 28.00 " 30
31 12.00 " 11.55 " 21.98 " 21.50 " 27.65 " 15.98 " 18.97 " 31
Mean 11.55 " 11.44 " 11.58 " 13.01 " 35.33 " 31.88 " 43.54 " 25.42 " 62.00 " 20.29 # 14.30 " 12.86 "
Median 11.54 " 11.22 " 11.51 " 13.25 " 18.00 " 23.31 " 24.48 " 23.56 " 23.73 " 18.34 # 14.15 " 11.96 "
Maximum 12.79 " 12.84 " 12.35 " 14.21 " 187.4 " 105.6 " 214.3 " 43.45 " 464.7 " 41.89 # 16.14 " 28.00 "
Minimum 9.974" 10.66 " 11.16 " 11.33 " 13.23 " 18.03 " 19.35 " 20.37 " 18.78 " 14.92 # 12.23 " 11.06 "
Total 358.0 " 331.8 " 359.1 " 390.3 "1095 " 956.4 "1350 " 788.2 "1860 " 628.9 # 429.1 " 398.6 "
Summaries ------------------ Notes -------------------
--------- All recorded data is continuous and reliable
except where the following tags are used...
Annual Mean 24.44 # " ... Relative Uncertainty +/-10%
Ann. Median 15.44 # # ... Relative Uncertainty +/-15%
Annual Total 8945 #
Maximum Minimum
Daily 464.7 # 9.974#
Department of Water and Environmental Regulation HYDAY V146 Output 14/05/2026
Site 701009 Irwin River - Mountain Bridge Year 2005
VarFrom 10.00 Stage - SL in Metres Table Type Total
VarTo 151.00 Stream Discharge Volume in Megalitres
Figures are for period ending 24:00
Day Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec Day
1 14.49 " 10.64 " 11.67 " 32.28 " 17.07 " 15.56 " 36.05 " 19.30 " 28.38 " 19.45 " 16.66 " 11.84 " 1
2 13.04 " 9.984" 11.62 " 26.61 " 22.21 " 15.26 " 31.61 " 19.40 " 26.95 " 19.24 " 16.03 " 11.87 " 2
3 12.42 " 9.685" 11.53 " 23.18 " 22.74 " 15.40 " 29.33 " 20.23 " 25.37 " 18.94 " 15.54 " 11.98 " 3
4 11.89 " 9.908" 11.23 " 24.89 " 20.22 " 16.39 " 28.30 " 20.29 " 23.99 " 18.95 " 15.39 " 12.07 " 4
5 11.50 " 10.50 " 11.46 " 20.67 " 25.87 " 16.93 " 27.82 " 19.56 " 22.93 " 19.40 " 15.51 " 12.22 " 5
6 11.10 " 10.81 " 11.38 " 18.14 " 51.26 " 18.42 " 26.83 " 19.00 " 23.23 " 19.29 " 15.49 " 12.32 " 6
7 11.22 " 10.90 " 10.98 " 16.86 " 49.41 " 31.73 " 25.54 " 18.70 " 24.53 " 18.84 " 15.34 " 12.22 " 7
8 11.54 " 10.87 " 10.94 " 16.09 " 51.73 " 139.8 " 24.27 " 18.40 " 25.00 " 18.34 " 15.45 " 12.15 " 8
9 11.61 " 10.82 " 11.11 " 15.77 " 39.12 " 136.8 " 23.25 " 18.14 " 26.82 " 17.94 " 15.53 " 12.07 " 9
10 11.76 " 10.90 " 11.14 " 14.99 " 29.39 " 144.6 " 22.47 " 18.19 " 26.54 " 17.60 " 15.25 " 12.09 " 10
11 11.60 " 11.28 " 11.38 " 14.44 " 24.07 " 247.3 " 21.82 " 18.83 " 25.83 " 17.21 " 14.85 " 12.25 " 11
12 11.38 " 11.41 " 11.48 " 14.35 " 26.40 " 177.6 " 21.35 " 18.97 " 24.76 " 16.91 " 14.76 " 12.46 " 12
13 10.98 " 11.62 " 11.76 " 14.38 " 40.07 " 144.8 " 22.40 " 21.68 " 23.57 " 16.78 " 14.41 " 12.44 " 13
14 10.67 " 11.62 " 13.06 " 13.92 " 194.7 " 105.9 " 23.71 " 24.09 " 22.53 " 16.59 " 13.95 " 12.38 " 14
15 10.30 " 11.17 " 12.93 " 13.65 " 122.3 " 77.48 " 24.07 " 23.31 " 21.77 " 16.41 " 13.66 " 12.30 " 15
16 9.916" 11.09 " 11.72 " 13.73 " 74.06 " 60.58 " 24.36 " 23.65 " 20.94 " 16.38 " 13.48 " 12.16 " 16
17 9.677" 11.36 " 12.36 " 14.01 " 59.33 " 62.53 " 24.41 " 30.52 " 20.44 " 16.50 " 13.48 " 12.06 " 17
18 10.03 " 11.24 " 14.55 " 13.97 " 46.50 " 87.68 " 23.63 " 58.10 " 20.27 " 16.50 " 13.18 " 11.88 " 18
19 10.39 " 10.79 " 14.78 " 13.65 " 37.37 " 211.8 " 22.42 " 194.1 " 19.88 " 16.39 " 12.66 " 11.79 " 19
20 10.45 " 10.63 " 14.12 " 13.44 " 31.31 " 159.4 " 21.54 " 310.4 " 20.36 " 16.24 " 12.16 " 11.80 " 20
21 10.31 " 11.10 " 15.37 " 13.81 " 30.76 " 109.6 " 22.95 " 204.0 " 23.36 " 16.18 " 11.91 " 11.74 " 21
22 10.44 " 11.48 " 13.52 " 14.09 " 27.96 " 78.05 " 24.60 " 126.6 " 24.50 " 16.19 " 11.75 " 11.76 " 22
23 10.35 " 11.60 " 12.61 " 14.03 " 24.21 " 57.40 " 23.29 " 86.78 " 28.50 " 16.06 " 11.68 " 11.96 " 23
24 10.44 " 11.27 " 12.48 " 14.05 " 21.69 " 47.24 " 22.64 " 65.51 " 30.23 " 15.88 " 11.62 " 11.80 " 24
25 10.73 " 11.55 " 12.47 " 13.87 " 20.06 " 67.90 " 22.44 " 53.28 " 28.99 " 16.26 " 11.45 " 11.65 " 25
26 10.45 " 12.38 " 12.47 " 13.89 " 18.88 " 116.7 " 21.73 " 45.03 " 25.91 " 16.36 " 11.30 " 11.76 " 26
27 10.89 " 11.95 " 12.44 " 14.17 " 17.88 " 97.12 " 21.04 " 40.05 " 23.31 " 16.26 " 11.13 " 11.86 " 27
28 11.20 " 11.79 " 13.13 " 14.26 " 17.11 " 71.61 " 20.52 " 36.13 " 21.51 " 16.98 " 11.19 " 11.95 " 28
29 10.77 " 141.3 " 14.10 " 16.65 " 53.98 " 20.27 " 33.29 " 20.50 " 17.17 " 11.49 " 11.88 " 29
30 10.58 " 90.93 " 14.78 " 16.29 " 42.82 " 20.08 " 31.38 " 19.83 " 16.74 " 11.74 " 11.86 " 30
31 10.72 " 41.74 " 15.91 " 19.72 " 29.81 " 16.72 " 11.92 " 31
Mean 11.06 " 11.08 " 19.99 " 16.34 " 39.12 " 87.61 " 24.01 " 53.77 " 24.02 " 17.25 " 13.60 " 12.02 "
Median 10.77 " 11.13 " 12.44 " 14.22 " 26.40 " 74.55 " 23.25 " 24.09 " 23.78 " 16.74 " 13.57 " 11.96 "
Maximum 14.49 " 12.38 " 141.3 " 32.28 " 194.7 " 247.3 " 36.05 " 310.4 " 30.23 " 19.45 " 16.66 " 12.46 "
Minimum 9.677" 9.685" 10.94 " 13.44 " 15.91 " 15.26 " 19.72 " 18.14 " 19.83 " 15.88 " 11.13 " 11.65 "
Total 342.9 " 310.4 " 619.6 " 490.1 "1213 "2628 " 744.5 "1667 " 720.7 " 534.7 " 408.0 " 372.5 "
Summaries ------------------ Notes -------------------
--------- All recorded data is continuous and reliable
except where the following tags are used...
Annual Mean 27.54 " " ... Relative Uncertainty +/-10%
Ann. Median 16.36 "
Annual Total 10051 "
Maximum Minimum
Daily 310.4 " 9.677"
Department of Water and Environmental Regulation HYDAY V146 Output 14/05/2026
Site 701009 Irwin River - Mountain Bridge Year 2006
VarFrom 10.00 Stage - SL in Metres Table Type Total
VarTo 151.00 Stream Discharge Volume in Megalitres
Figures are for period ending 24:00
Day Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec Day
1 11.67 " 12.69 " 16.94 " 15.22 " 13.82 " 15.43 " 16.45 " 21.93 " 20.03 " 14.59 " 13.56 " 11.33 " 1
2 11.37 " 12.46 " 16.94 " 14.86 " 13.64 " 15.10 " 16.66 " 20.44 " 19.16 " 14.68 " 12.86 " 10.66 " 2
3 11.30 " 12.20 " 16.35 " 13.80 " 13.56 " 14.83 " 16.40 " 19.51 " 17.92 " 14.64 " 12.01 " 10.27 " 3
4 11.49 " 11.85 " 15.27 " 13.32 " 13.66 " 14.56 " 16.56 " 18.68 " 17.38 " 14.45 " 12.17 " 10.32 " 4
5 11.58 " 11.38 " 14.45 " 12.71 " 13.64 " 14.54 " 16.12 " 18.41 " 16.94 " 13.92 " 13.15 " 10.43 " 5
6 11.43 " 11.09 " 14.09 " 12.35 " 14.13 " 14.65 " 15.36 " 18.08 " 16.48 " 13.67 " 11.95 " 10.53 " 6
7 11.20 " 11.35 " 13.56 " 12.30 " 14.31 " 14.94 " 14.90 " 18.64 " 17.58 " 13.59 " 11.92 " 10.76 " 7
8 11.07 " 11.94 " 13.20 " 12.55 " 13.89 " 14.69 " 14.93 " 19.52 " 23.05 " 13.22 " 12.03 " 11.47 " 8
9 11.09 " 11.83 " 13.17 " 12.92 " 13.64 " 14.39 " 18.67 " 18.53 " 23.11 " 12.99 " 11.96 " 11.36 " 9
10 11.03 " 12.76 " 13.21 " 12.83 " 13.52 " 14.37 " 22.59 " 17.83 " 20.28 " 13.31 " 12.04 " 10.59 " 10
11 10.94 "1178 " 13.16 " 13.04 " 13.23 " 14.63 " 21.90 " 17.65 " 21.40 " 15.08 " 12.11 " 9.927" 11
12 13.36 "3064 " 12.84 " 13.31 " 13.06 " 14.69 " 18.91 " 17.75 " 23.59 " 15.91 " 12.05 " 9.654" 12
13 40.26 " 597.1 " 12.42 " 13.22 " 12.92 " 14.72 " 17.61 " 18.11 " 20.52 " 15.39 " 11.86 " 9.857" 13
14 265.1 " 271.0 " 12.23 " 12.80 " 12.86 " 15.00 " 17.25 " 17.92 " 18.73 " 14.49 " 11.81 " 10.12 " 14
15 169.4 " 154.1 " 12.01 " 12.59 " 13.73 " 14.92 " 17.07 " 19.87 " 18.16 " 13.93 " 11.99 " 10.07 " 15
16 100.7 " 99.33 " 11.70 " 13.33 " 15.73 " 14.59 " 16.83 " 22.77 " 17.94 " 13.74 " 11.84 " 9.807" 16
17 66.94 " 67.23 " 11.56 " 12.99 " 16.30 " 14.54 " 16.74 " 19.79 " 17.72 " 13.44 " 11.63 " 10.03 " 17
18 46.37 " 48.47 " 11.48 " 12.79 " 15.62 " 14.75 " 16.52 " 18.27 " 17.45 " 13.18 " 11.83 " 10.27 " 18
19 33.77 " 37.04 " 11.43 " 12.66 " 14.86 " 15.32 " 16.49 " 19.27 " 17.30 " 13.08 " 12.02 " 14.05 " 19
20 27.33 " 30.59 " 11.28 " 12.42 " 14.23 " 18.49 " 16.81 " 26.09 " 16.88 " 12.70 " 11.94 " 15.93 " 20
21 23.21 " 26.49 " 11.28 " 12.56 " 13.79 " 17.73 " 17.76 " 23.27 " 16.91 " 12.75 " 11.65 " 14.52 " 21
22 20.15 " 23.56 " 11.67 " 13.28 " 13.57 " 16.69 " 17.62 " 27.44 " 17.33 " 13.34 " 11.28 " 12.17 " 22
23 17.94 " 21.86 " 12.19 " 13.68 " 15.89 " 16.05 " 16.64 " 25.88 " 17.16 " 13.51 " 11.04 " 10.62 " 23
24 17.01 " 20.55 " 12.66 " 14.10 " 20.47 " 15.56 " 21.22 " 22.08 " 16.59 " 12.99 " 11.14 " 9.718" 24
25 16.45 " 19.11 " 12.68 " 14.43 " 16.94 " 15.15 " 30.05 " 20.79 " 16.21 " 12.27 " 11.07 " 9.263" 25
26 15.81 " 18.34 " 12.42 " 15.44 " 15.26 " 15.36 " 23.02 " 19.96 " 15.96 " 12.29 " 10.75 " 9.109" 26
27 14.89 " 18.48 " 12.14 " 14.65 " 14.41 " 15.78 " 20.78 " 18.99 " 15.53 " 12.44 " 10.89 " 9.018" 27
28 14.03 " 17.29 " 12.71 " 13.92 " 14.15 " 17.68 " 20.41 " 18.38 " 15.03 " 12.71 " 11.68 " 9.202" 28
29 13.43 " 12.99 " 13.64 " 16.13 " 17.34 " 19.51 " 18.03 " 14.52 " 12.93 " 11.77 " 9.491" 29
30 12.98 " 12.07 " 13.49 " 16.44 " 16.55 " 18.80 " 17.90 " 14.55 " 12.87 " 11.74 " 9.801" 30
31 12.89 " 12.39 " 15.84 " 19.23 " 18.90 " 13.33 " 9.892" 31
Mean 34.39 " 208.3 " 12.98 " 13.37 " 14.62 " 15.44 " 18.38 " 20.02 " 18.05 " 13.59 " 11.86 " 10.65 "
Median 14.03 " 19.83 " 12.66 " 13.25 " 14.13 " 14.97 " 17.25 " 18.99 " 17.42 " 13.34 " 11.89 " 10.27 "
Maximum 265.1 "3064 " 16.94 " 15.44 " 20.47 " 18.49 " 30.05 " 27.44 " 23.59 " 15.91 " 13.56 " 15.93 "
Minimum 10.94 " 11.09 " 11.28 " 12.30 " 12.86 " 14.37 " 14.90 " 17.65 " 14.52 " 12.27 " 10.75 " 9.018"
Total 1066 "5833 " 402.5 " 401.2 " 453.3 " 463.1 " 569.8 " 620.7 " 541.4 " 421.4 " 355.7 " 330.2 "
Summaries ------------------ Notes -------------------
--------- All recorded data is continuous and reliable
except where the following tags are used...
Annual Mean 31.39 " " ... Relative Uncertainty +/-10%
Ann. Median 14.45 "
Annual Total 11458 "
Maximum Minimum
Daily 3064 " 9.018"
Department of Water and Environmental Regulation HYDAY V146 Output 14/05/2026
Site 701009 Irwin River - Mountain Bridge Year 2007
VarFrom 10.00 Stage - SL in Metres Table Type Total
VarTo 151.00 Stream Discharge Volume in Megalitres
Figures are for period ending 24:00
Day Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec Day
1 10.02 " 9.764" 10.70 " 10.28 " 14.66 " 13.82 " 20.96 " 21.84 " 16.78 " 15.56 " 11.85 " 10.61 " 1
2 10.20 " 9.887" 11.03 " 10.35 " 15.01 " 13.39 " 20.21 " 21.33 " 16.23 " 15.34 " 11.34 " 10.75 " 2
3 12.29 " 10.03 " 10.85 " 10.19 " 14.49 " 13.21 " 22.00 " 20.51 " 15.56 " 15.02 " 10.83 " 10.72 " 3
4 14.83 " 9.815" 10.23 " 10.10 " 13.85 " 13.30 " 21.63 " 18.95 " 15.59 " 14.74 " 10.36 " 10.66 " 4
5 13.18 " 9.394" 9.748" 10.39 " 13.40 " 13.35 " 19.20 " 18.16 " 15.95 " 14.48 " 10.23 " 10.84 " 5
6 11.78 " 9.150" 9.374" 10.82 " 13.33 " 13.12 " 17.81 " 20.15 " 15.78 " 14.53 " 10.57 " 10.88 " 6
7 11.02 " 9.099" 9.067" 10.92 " 13.22 " 12.85 " 16.72 " 24.83 " 15.86 " 14.75 " 10.82 " 10.62 " 7
8 10.62 " 9.259" 8.888" 11.58 " 12.63 " 13.41 " 16.68 " 21.90 " 16.01 " 16.53 " 10.99 " 10.48 " 8
9 10.68 " 9.431" 8.985" 11.40 " 12.28 " 13.76 " 17.71 " 19.95 " 15.90 " 18.52 " 11.09 " 10.07 " 9
10 11.01 " 9.568" 9.031" 11.01 " 12.02 " 13.71 " 17.45 " 19.14 " 15.34 " 18.24 " 10.91 " 9.904" 10
11 11.12 " 9.635" 9.088" 10.84 " 11.90 " 13.54 " 16.62 " 20.27 " 14.90 " 16.79 " 10.35 " 10.62 " 11
12 10.71 " 9.638" 9.097" 10.70 " 12.07 " 13.26 " 16.24 " 20.68 " 15.30 " 15.23 " 10.05 " 10.56 " 12
13 10.37 " 9.657" 9.208" 10.70 " 12.27 " 13.06 " 15.85 " 19.31 " 15.94 " 14.14 " 10.27 " 10.49 " 13
14 10.20 " 9.758" 9.433" 11.00 " 12.29 " 13.56 " 15.62 " 18.76 " 15.82 " 13.68 " 10.58 " 10.51 " 14
15 10.01 " 9.759" 9.605" 11.06 " 12.16 " 14.28 " 15.21 " 18.36 " 15.91 " 13.35 " 10.69 " 10.18 " 15
16 9.673" 9.815" 9.581" 11.04 " 12.18 " 14.05 " 14.87 " 17.95 " 15.58 " 13.19 " 10.36 " 10.11 " 16
17 9.608" 9.880" 9.260" 11.07 " 12.24 " 13.59 " 14.80 " 17.52 " 15.26 " 13.00 " 10.35 " 12.50 " 17
18 9.750" 9.964" 9.033" 11.21 " 12.59 " 13.33 " 14.59 " 17.01 " 15.54 " 12.80 " 10.37 " 13.66 " 18
19 9.683" 9.882" 9.028" 11.39 " 12.76 " 13.45 " 15.09 " 17.19 " 15.46 " 12.54 " 10.33 " 12.95 " 19
20 9.530" 9.839" 9.033" 11.41 " 12.81 " 13.50 " 18.50 " 19.03 " 14.94 " 12.60 " 10.18 " 12.01 " 20
21 9.342" 9.763" 9.191" 11.38 " 13.07 " 13.49 " 19.47 " 19.15 " 14.46 " 12.69 " 9.941" 11.26 " 21
22 9.291" 9.866" 9.403" 11.44 " 12.84 " 13.93 " 20.52 " 18.69 " 14.49 " 12.28 " 9.649" 10.60 " 22
23 9.524" 10.01 " 9.526" 11.70 " 12.87 " 16.52 " 22.39 " 20.24 " 14.52 " 11.59 " 9.629" 9.752" 23
24 9.758" 9.811" 9.400" 11.95 " 13.14 " 17.75 " 25.85 " 20.30 " 19.88 " 11.28 " 9.758" 9.293" 24
25 9.839" 9.507" 9.285" 12.23 " 13.59 " 17.34 " 26.17 " 18.65 " 26.49 " 11.67 " 9.940" 8.932" 25
26 9.741" 9.652" 9.474" 12.45 " 14.72 " 15.80 " 24.33 " 18.22 " 22.97 " 12.03 " 10.15 " 8.778" 26
27 9.817" 10.19 " 9.746" 12.18 " 16.42 " 14.76 " 21.43 " 18.18 " 19.46 " 12.73 " 9.944" 8.906" 27
28 9.868" 10.41 " 9.837" 11.99 " 18.11 " 17.30 " 25.35 " 17.99 " 17.71 " 12.85 " 9.782" 9.197" 28
29 9.932" 9.846" 12.10 " 17.65 " 20.54 " 23.76 " 17.70 " 16.64 " 12.84 " 9.949" 9.294" 29
30 9.863" 9.766" 13.26 " 15.81 " 20.49 " 21.17 " 17.84 " 15.93 " 12.41 " 10.25 " 9.325" 30
31 9.833" 9.905" 14.54 " 22.33 " 17.51 " 12.20 " 9.224" 31
Mean 10.42 " 9.729" 9.537" 11.27 " 13.58 " 14.58 " 19.37 " 19.27 " 16.54 " 13.86 " 10.38 " 10.44 "
Median 9.932" 9.764" 9.403" 11.14 " 13.07 " 13.58 " 19.20 " 18.95 " 15.84 " 13.19 " 10.34 " 10.51 "
Maximum 14.83 " 10.41 " 11.03 " 13.26 " 18.11 " 20.54 " 26.17 " 24.83 " 26.49 " 18.52 " 11.85 " 13.66 "
Minimum 9.291" 9.099" 8.888" 10.10 " 11.90 " 12.85 " 14.59 " 17.01 " 14.46 " 11.28 " 9.629" 8.778"
Total 323.1 " 272.4 " 295.7 " 338.2 " 420.9 " 437.4 " 600.5 " 597.3 " 496.2 " 429.6 " 311.5 " 323.7 "
Summaries ------------------ Notes -------------------
--------- All recorded data is continuous and reliable
except where the following tags are used...
Annual Mean 13.28 " " ... Relative Uncertainty +/-10%
Ann. Median 12.23 "
Annual Total 4847 "
Maximum Minimum
Daily 26.49 " 8.778"
Department of Water and Environmental Regulation HYDAY V146 Output 14/05/2026
Site 701009 Irwin River - Mountain Bridge Year 2008
VarFrom 10.00 Stage - SL in Metres Table Type Total
VarTo 151.00 Stream Discharge Volume in Megalitres
Figures are for period ending 24:00
Day Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec Day
1 9.24" 8.32" 31.76" 17.59" 1489 " 21.51" 137.4 " 796.2 " 61.87" 17.95" 11.99" 10.35" 1
2 9.28" 8.46" 27.75" 15.16" 549.3 " 20.03" 70.60" 417.1 " 42.26" 18.31" 11.83" 10.46" 2
3 9.30" 8.63" 24.63" 13.50" 285.6 " 18.50" 48.38" 243.8 " 31.82" 17.09" 12.01" 10.80" 3
4 9.09" 8.96" 22.52" 13.28" 177.4 " 17.46" 43.78" 166.1 " 26.99" 15.87" 12.92" 11.25" 4
5 8.98" 9.26" 21.31" 14.02" 119.1 " 16.46" 42.04" 118.5 " 23.76" 15.13" 13.04" 10.66" 5
6 8.78" 10.08" 20.63" 13.92" 86.52" 16.20" 56.77" 87.45" 21.60" 14.28" 13.62" 10.25" 6
7 8.69" 13.12" 20.33" 13.30" 66.90" 16.06" 45.12" 68.51" 19.86" 13.91" 13.16" 10.19" 7
8 8.74" 9292 $ 100.6 " 12.94" 53.80" 15.89" 30.85" 55.91" 18.77" 13.45" 11.86" 10.06" 8
9 8.85" 3907 " 90.10" 12.67" 44.36" 23.81" 27.97" 46.53" 18.14" 13.24" 11.78" 10.22" 9
10 8.94" 1722 " 36.88" 12.43" 37.95" 24.92" 25.83" 39.52" 17.92" 13.47" 12.24" 10.53" 10
11 8.85" 659.8 " 25.09" 12.25" 34.14" 20.42" 33.28" 34.64" 18.28" 13.35" 12.63" 10.96" 11
12 8.90" 319.2 " 20.42" 11.81" 31.11" 18.84" 28.43" 30.90" 19.96" 13.29" 12.61" 10.15" 12
13 9.00" 231.6 " 17.93" 11.44" 29.71" 17.88" 27.32" 28.16" 19.57" 12.97" 11.47" 9.91" 13
14 8.99" 201.1 " 16.02" 11.26" 29.91" 17.55" 23.81" 25.91" 18.06" 12.40" 10.70" 9.34" 14
15 9.03" 119.7 " 14.90" 11.24" 26.60" 22.75" 26.29" 24.22" 17.92" 13.04" 10.25" 9.39" 15
16 8.79" 78.85" 14.30" 11.43" 25.37" 28.01" 55.48" 22.86" 17.32" 13.59" 10.25" 9.48" 16
17 8.70" 53.22" 13.96" 16.73" 23.75" 26.43" 149.1 " 21.85" 18.83" 13.16" 10.95" 9.28" 17
18 9.06" 39.03" 13.56" 489.4 " 22.56" 22.39" 176.1 " 21.10" 19.13" 12.63" 10.88" 9.13" 18
19 9.19" 31.45" 13.11" 328.7 " 21.70" 22.57" 287.9 " 20.86" 18.70" 12.23" 10.47" 9.23" 19
20 9.06" 27.51" 70.67" 119.7 " 20.94" 21.26" 469.6 " 20.73" 17.34" 11.89" 10.53" 9.26" 20
21 8.86" 106.5 " 45.00" 63.53" 20.40" 18.92" 191.7 " 19.76" 17.87" 11.97" 10.87" 9.47" 21
22 8.61" 603.7 " 25.88" 40.05" 22.00" 17.77" 103.8 " 19.27" 18.14" 12.13" 11.86" 9.29" 22
23 8.40" 242.3 " 92.08" 30.01" 22.36" 17.33" 72.88" 19.08" 16.01" 12.84" 12.23" 9.45" 23
24 8.38" 116.0 " 75.15" 25.31" 20.76" 17.34" 78.33" 19.28" 16.00" 17.33" 14.80" 9.36" 24
25 8.73" 77.03" 37.43" 21.50" 22.50" 19.62" 75.85" 19.51" 20.10" 17.78" 12.71" 9.38" 25
26 9.21" 112.8 " 25.48" 18.91" 20.32" 18.83" 93.46" 19.35" 28.42" 14.18" 11.64" 9.37" 26
27 9.07" 84.07" 77.01" 17.36" 19.10" 23.49" 167.9 " 19.28" 21.97" 13.12" 11.50" 9.13" 27
28 8.93" 56.55" 89.55" 19.13" 18.78" 428.8 " 214.9 " 19.45" 20.61" 13.87" 11.08" 8.95" 28
29 8.92" 39.61" 44.43"16208 $ 19.17" 529.2 " 1598 " 20.04" 18.61" 15.96" 10.62" 8.70" 29
30 8.76" 26.31" 8129 $ 19.23" 204.6 " 842.3 " 221.8 " 18.73" 14.53" 10.48" 8.50" 30
31 8.50" 20.72" 18.46" 880.1 " 118.0 " 12.72" 8.74" 31
Mean 8.898" 627.2 $ 37.92 " 857.8 $ 109.7 " 56.83 " 197.6 " 90.50 " 22.15 " 14.12 " 11.77 " 9.718"
Median 8.919" 78.85 $ 25.48 " 15.95 $ 25.37 " 19.83 " 72.88 " 25.91 " 18.80 " 13.45 " 11.81 " 9.451"
Maximum 9.30" 9292 $ 100.6 "16208 $ 1489 " 529.2 " 1598 " 796.2 " 61.87" 18.31" 14.80" 11.25"
Minimum 8.376" 8.316$ 13.11 " 11.24 $ 18.46 " 15.89 " 23.81 " 19.08 " 16.00 " 11.89 " 10.25 " 8.496"
Total 275.8 "18187 $ 1175 "25735 $ 3399 " 1705 " 6125 " 2806 " 664.6 " 437.7 " 353.0 " 301.2 "
Summaries ------------------ Notes -------------------
--------- All recorded data is continuous and reliable
except where the following tags are used...
Annual Mean 167.1 $ " ... Relative Uncertainty +/-10%
Ann. Median 18.80 $ $ ... Relative Uncertainty +/-20%
Annual Total 61166 $
Maximum Minimum
Daily 16208 $ 8.316$
Department of Water and Environmental Regulation HYDAY V146 Output 14/05/2026
Site 701009 Irwin River - Mountain Bridge Year 2009
VarFrom 10.00 Stage - SL in Metres Table Type Total
VarTo 151.00 Stream Discharge Volume in Megalitres
Figures are for period ending 24:00
Day Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec Day
1 9.013" 8.802" 9.055" 9.829" 10.13 " 16.56 " 467.8 " 43.29 " 25.17 " 20.88 " 12.30 " 10.38 " 1
2 27.62 " 8.403" 9.201" 9.605" 10.01 " 16.09 " 241.6 " 39.16 " 25.92 " 18.91 " 11.15 " 10.19 " 2
3 23.26 " 8.218" 8.797" 9.327" 10.02 " 15.56 " 134.5 " 35.86 " 24.34 " 18.10 " 10.90 " 9.864" 3
4 13.40 " 7.993" 8.193" 8.984" 9.995" 15.07 " 86.63 " 33.57 " 23.28 " 17.35 " 10.87 " 9.499" 4
5 9.715" 8.031" 7.934" 8.943" 9.916" 15.11 " 59.39 " 31.83 " 26.66 " 16.88 " 12.34 " 9.365" 5
6 8.714" 8.087" 8.072" 8.943" 9.875" 15.55 " 48.71 " 31.84 " 26.79 " 16.62 " 12.87 " 9.829" 6
7 8.463" 8.100" 8.077" 8.970" 9.971" 15.46 " 43.41 " 34.09 " 24.18 " 16.13 " 12.84 " 9.680" 7
8 8.213" 7.980" 8.052" 9.041" 10.04 " 14.47 " 58.93 " 31.08 " 23.23 " 15.98 " 12.15 " 9.188" 8
9 8.316" 7.565" 8.124" 9.149" 10.14 " 13.89 " 140.3 " 31.79 " 22.75 " 15.93 " 11.63 " 9.137" 9
10 8.079" 7.453" 8.144" 9.169" 10.23 " 25.28 "1730 " 31.46 " 22.51 " 15.59 " 11.42 " 8.977" 10
11 7.761" 7.468" 8.314" 9.648" 10.54 " 36.67 "1465 " 31.16 " 23.25 " 15.41 " 11.56 " 8.753" 11
12 7.996" 7.493" 8.797" 10.14 " 10.61 " 29.13 " 597.9 " 30.17 " 25.61 " 14.85 " 11.90 " 8.623" 12
13 8.339" 7.666" 9.199" 10.18 " 10.28 " 21.51 " 316.9 " 33.51 " 23.93 " 14.68 " 11.46 " 8.569" 13
14 8.372" 8.086" 8.946" 10.30 " 10.30 " 18.51 " 202.8 " 42.61 " 23.43 " 14.49 " 11.19 " 8.938" 14
15 8.168" 8.555" 8.791" 10.19 " 10.47 " 17.02 " 141.9 " 53.52 " 25.64 " 13.89 " 11.13 " 9.380" 15
16 8.051" 8.717" 8.923" 10.03 " 10.62 " 16.41 " 131.1 " 56.27 " 30.68 " 12.87 " 11.21 " 9.337" 16
17 8.506" 8.583" 9.369" 10.05 " 10.78 " 15.99 " 94.76 " 54.46 " 25.10 " 12.12 " 11.36 " 9.062" 17
18 8.945" 8.537" 9.585" 10.18 " 11.09 " 15.87 " 79.74 " 47.68 " 25.81 " 12.54 " 12.78 " 8.742" 18
19 8.784" 8.194" 9.449" 10.30 " 11.39 " 19.91 " 134.6 " 55.66 " 25.24 " 13.47 " 14.59 " 8.874" 19
20 8.246" 8.035" 9.613" 10.46 " 11.81 " 22.56 " 257.6 " 47.65 " 22.79 " 13.66 " 13.38 " 8.952" 20
21 8.196" 7.955" 9.706" 10.35 " 17.11 " 21.95 " 943.6 " 64.37 " 22.84 " 13.18 " 11.91 " 9.088" 21
22 8.494" 8.036" 9.771" 10.32 " 26.18 " 19.64 " 730.0 " 59.76 " 21.46 " 13.34 " 11.01 " 9.330" 22
23 8.750" 8.220" 9.902" 10.15 " 325.6 " 18.85 " 363.4 " 61.09 " 20.19 " 13.59 " 10.38 " 9.199" 23
24 8.728" 8.460" 10.03 " 10.02 " 127.8 " 23.37 " 265.8 " 47.20 " 19.43 " 13.66 " 9.717" 8.909" 24
25 8.797" 8.870" 10.02 " 10.34 " 79.74 " 31.23 " 352.7 " 38.71 " 18.32 " 14.52 " 9.875" 8.726" 25
26 8.927" 9.120" 9.823" 10.53 " 40.39 " 23.66 " 200.4 " 33.17 " 17.45 " 17.57 " 10.10 " 9.106" 26
27 9.137" 8.820" 9.592" 10.56 " 28.27 " 52.08 " 122.3 " 30.31 " 16.78 " 19.78 " 10.11 " 8.972" 27
28 9.398" 8.794" 9.637" 10.58 " 23.29 " 50.16 " 88.00 " 29.28 " 17.18 " 17.24 " 10.01 " 8.807" 28
29 9.898" 9.696" 10.42 " 19.43 " 51.86 " 69.27 " 29.89 " 22.77 " 15.10 " 9.963" 8.705" 29
30 9.741" 9.635" 10.22 " 17.36 " 441.2 " 57.10 " 26.87 " 25.60 " 13.82 " 10.32 " 8.604" 30
31 9.249" 9.860" 16.77 " 48.89 " 25.72 " 13.19 " 8.806" 31
Mean 9.912" 8.223" 9.107" 9.898" 30.01 " 37.02 " 312.1 " 40.10 " 23.28 " 15.33 " 11.41 " 9.148"
Median 8.728" 8.147" 9.201" 10.14 " 10.62 " 19.24 " 140.3 " 34.09 " 23.35 " 14.85 " 11.29 " 9.062"
Maximum 27.62 " 9.120" 10.03 " 10.58 " 325.6 " 441.2 "1730 " 64.37 " 30.68 " 20.88 " 14.59 " 10.38 "
Minimum 7.761" 7.453" 7.934" 8.943" 9.875" 13.89 " 43.41 " 25.72 " 16.78 " 12.12 " 9.717" 8.569"
Total 307.3 " 230.2 " 282.3 " 296.9 " 930.2 "1111 "9675 "1243 " 698.3 " 475.3 " 342.4 " 283.6 "
Summaries ------------------ Notes -------------------
--------- All recorded data is continuous and reliable
except where the following tags are used...
Annual Mean 43.49 " " ... Relative Uncertainty +/-10%
Ann. Median 11.39 "
Annual Total 15876 "
Maximum Minimum
Daily 1730 " 7.453"
Department of Water and Environmental Regulation HYDAY V146 Output 14/05/2026
Site 701009 Irwin River - Mountain Bridge Year 2010
VarFrom 10.00 Stage - SL in Metres Table Type Total
VarTo 151.00 Stream Discharge Volume in Megalitres
Figures are for period ending 24:00
Day Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec Day
1 8.918" 8.648" 7.697" 10.10 " 12.15 " 16.33 " 14.89 " 18.73 " 24.68 " 13.88 " 9.828" 8.875" 1
2 8.651" 8.694" 7.724" 10.42 " 11.94 " 16.07 " 14.92 " 18.18 " 41.50 " 13.45 " 9.616" 8.973" 2
3 8.261" 8.649" 8.248" 10.70 " 11.86 " 15.67 " 14.92 " 17.82 " 135.1 " 13.01 " 9.438" 9.149" 3
4 8.377" 8.464" 8.669" 10.52 " 11.73 " 15.59 " 14.75 " 17.47 " 88.38 " 12.56 " 9.747" 9.365" 4
5 8.812" 8.424" 8.540" 10.98 " 11.44 " 17.43 " 14.78 " 17.38 " 60.07 " 12.29 " 10.21 " 9.549" 5
6 9.086" 8.695" 8.364" 11.94 " 11.45 " 17.22 " 14.95 " 17.46 " 41.63 " 12.00 " 10.36 " 9.869" 6
7 9.290" 9.245" 8.391" 17.64 " 11.46 " 16.40 " 14.87 " 17.42 " 32.75 " 11.46 " 10.40 " 10.15 " 7
8 9.352" 9.564" 8.420" 137.8 " 11.65 " 15.75 " 17.38 " 17.00 " 28.73 " 11.20 " 10.36 " 9.845" 8
9 9.509" 9.391" 9.487" 99.39 " 12.17 " 14.95 " 61.92 " 16.70 " 25.53 " 11.21 " 10.21 " 9.494" 9
10 9.475" 9.362" 12.69 " 40.32 " 12.10 " 14.55 " 49.71 " 16.32 " 23.14 " 11.84 " 10.13 " 9.018" 10
11 9.106" 9.327" 8.599" 25.51 " 11.80 " 14.42 " 134.5 " 15.85 " 21.70 " 11.87 " 10.38 " 8.763" 11
12 8.933" 9.567" 8.461" 20.06 " 11.91 " 14.47 " 73.09 " 27.34 " 21.36 " 11.62 " 10.38 " 8.568" 12
13 8.962" 9.509" 8.739" 17.74 " 16.77 " 14.36 " 45.30 " 43.09 " 19.80 " 11.55 " 10.07 " 8.660" 13
14 8.547" 9.082" 9.273" 18.13 " 17.67 " 14.43 " 36.92 " 32.88 " 18.73 " 11.31 " 9.772" 8.848" 14
15 8.634" 8.946" 9.425" 16.90 " 15.51 " 17.12 " 35.13 " 42.96 " 18.02 " 10.91 " 9.568" 8.871" 15
16 8.228" 9.199" 9.420" 15.42 " 14.77 " 19.89 " 30.11 " 40.56 " 17.32 " 10.74 " 9.246" 8.918" 16
17 7.634" 9.234" 9.158" 14.44 " 14.08 " 18.40 " 29.71 " 37.76 " 16.35 " 10.59 " 8.993" 9.278" 17
18 7.585" 9.041" 9.213" 13.56 " 14.32 " 16.95 " 26.42 " 42.57 " 15.87 " 10.28 " 8.802" 9.944" 18
19 7.521" 8.991" 9.344" 13.34 " 15.09 " 16.07 " 23.63 " 33.19 " 15.49 " 10.42 " 9.069" 10.53 " 19
20 7.839" 8.992" 9.645" 13.36 " 14.19 " 15.62 " 22.92 " 49.48 " 14.91 " 10.63 " 9.539" 10.09 " 20
21 8.388" 9.019" 11.23 " 13.02 " 13.77 " 15.53 " 21.78 " 44.16 " 14.61 " 11.50 " 9.476" 13.76 " 21
22 8.265" 8.915" 14.60 " 13.51 " 19.85 " 15.52 " 20.85 " 35.19 " 14.24 " 11.72 " 9.495" 13.04 " 22
23 8.110" 8.631" 12.39 " 14.35 " 27.18 " 18.44 " 20.18 " 30.71 " 13.93 " 11.23 " 9.523" 12.00 " 23
24 8.744" 8.222" 11.79 " 13.37 " 20.72 " 20.11 " 19.69 " 26.93 " 13.78 " 10.85 " 9.364" 22.61 " 24
25 9.600" 8.046" 24.85 " 12.28 " 17.78 " 17.15 " 19.28 " 23.89 " 13.85 " 10.64 " 9.166" 17.10 " 25
26 9.627" 8.187" 19.39 " 12.08 " 16.93 " 16.14 " 19.56 " 21.95 " 13.98 " 10.56 " 9.020" 12.64 " 26
27 9.298" 7.875" 14.45 " 11.80 " 27.14 " 15.71 " 20.05 " 20.81 " 13.72 " 11.02 " 8.722" 10.42 " 27
28 8.980" 7.461" 12.49 " 11.64 " 23.00 " 15.58 " 19.86 " 20.12 " 13.25 " 11.79 " 8.415" 9.646" 28
29 8.761" 10.97 " 11.62 " 19.13 " 15.32 " 20.16 " 20.03 " 12.79 " 11.43 " 8.323" 9.314" 29
30 8.762" 10.17 " 11.91 " 17.66 " 15.04 " 19.63 " 20.35 " 13.39 " 10.71 " 8.624" 9.097" 30
31 8.673" 9.977" 16.71 " 19.16 " 24.07 " 10.19 " 8.984" 31
Mean 8.707" 8.835" 10.70 " 21.80 " 15.61 " 16.21 " 29.39 " 26.72 " 27.29 " 11.43 " 9.541" 10.50 "
Median 8.761" 8.968" 9.420" 13.37 " 14.32 " 15.73 " 20.16 " 21.95 " 17.67 " 11.31 " 9.531" 9.494"
Maximum 9.627" 9.567" 24.85 " 137.8 " 27.18 " 20.11 " 134.5 " 49.48 " 135.1 " 13.88 " 10.40 " 22.61 "
Minimum 7.521" 7.461" 7.697" 10.10 " 11.44 " 14.36 " 14.75 " 15.85 " 12.79 " 10.19 " 8.323" 8.568"
Total 269.9 " 247.4 " 331.8 " 653.9 " 483.9 " 486.2 " 911.1 " 828.4 " 818.6 " 354.5 " 286.2 " 325.4 "
Summaries ------------------ Notes -------------------
--------- All recorded data is continuous and reliable
except where the following tags are used...
Annual Mean 16.43 " " ... Relative Uncertainty +/-10%
Ann. Median 12.00 "
Annual Total 5997 "
Maximum Minimum
Daily 137.8 " 7.461"
Department of Water and Environmental Regulation HYDAY V146 Output 14/05/2026
Site 701009 Irwin River - Mountain Bridge Year 2011
VarFrom 10.00 Stage - SL in Metres Table Type Total
VarTo 151.00 Stream Discharge Volume in Megalitres
Figures are for period ending 24:00
Day Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec Day
1 8.702" 9.699" 143.5 " 11.22 " 11.21 " 367.8 " 439.5 " 122.0 " 27.09 " 20.91 " 15.40 " 9.521# 1
2 8.810" 9.224" 214.2 " 10.92 " 11.17 " 166.1 " 391.6 " 105.7 " 32.70 " 22.54 " 13.98 " 9.374" 2
3 10.38 " 8.978" 120.8 " 10.79 " 11.20 " 114.9 " 255.0 " 123.1 " 38.71 " 29.47 " 13.69 " 9.168" 3
4 10.11 " 8.974" 58.87 " 10.55 " 11.21 " 115.8 " 168.7 " 130.9 " 51.91 " 25.62 " 15.13 " 9.197" 4
5 9.808" 8.773" 37.31 " 10.40 " 11.26 " 66.39 " 113.7 " 123.6 " 49.25 " 21.78 " 14.23 " 9.545" 5
6 10.82 " 8.246" 28.78 " 10.57 " 11.54 " 99.86 " 84.88 " 89.81 " 36.20 " 19.64 " 14.35 " 10.18 " 6
7 13.97 " 7.889" 24.28 " 11.30 " 11.09 " 73.42 " 65.24 " 68.41 " 31.20 " 18.68 " 21.97 " 10.65 " 7
8 21.13 " 7.832" 21.48 " 11.13 " 11.01 " 46.25 " 52.07 " 80.85 " 28.05 " 18.16 " 21.07 " 10.61 " 8
9 23.66 " 7.990" 19.42 " 10.60 " 11.18 " 37.58 " 42.52 " 206.2 " 25.75 " 17.70 " 17.43 " 10.35 " 9
10 14.49 " 8.089" 17.75 " 10.32 " 11.10 " 31.06 " 36.46 " 230.9 " 23.84 " 17.54 " 15.54 " 10.30 " 10
11 10.35 " 8.590" 17.05 " 11.75 " 10.87 " 27.25 " 35.23 " 179.1 " 22.56 " 17.29 " 14.13 " 10.23 " 11
12 9.085" 15.54 " 15.92 " 11.92 " 10.91 " 24.45 " 35.65 " 132.4 " 21.64 " 16.91 " 13.13 " 10.07 " 12
13 8.817"1146 " 14.74 " 11.68 " 11.09 " 22.52 " 144.7 " 98.62 " 20.92 # 16.33 " 12.65 " 10.10 " 13
14 8.775" 298.8 " 13.83 " 11.43 " 11.67 " 22.43 " 164.8 " 148.2 " 19.68 # 15.90 " 12.49 " 10.24 " 14
15 8.632" 137.3 " 13.12 " 11.08 " 13.64 " 22.77 " 119.1 " 208.4 " 19.20 # 15.16 " 12.00 " 10.06 " 15
16 8.399"1829 " 12.37 " 10.59 " 16.57 " 21.86 " 106.9 " 317.2 " 18.71 # 14.49 " 11.79 " 9.542" 16
17 8.573" 433.5 " 12.32 " 10.80 " 20.16 " 21.15 " 170.9 " 327.1 " 18.60 # 14.47 " 11.78 " 9.366" 17
18 8.727" 378.1 " 12.18 " 11.33 " 18.34 " 20.74 " 139.2 " 293.3 " 22.36 # 17.11 " 11.86 " 9.477" 18
19 8.646" 185.0 " 12.04 " 11.46 " 132.8 " 21.01 " 99.99 " 179.2 " 31.59 # 17.73 " 11.35 " 9.524" 19
20 8.557" 111.7 " 11.87 " 10.90 " 129.8 " 20.75 " 85.05 " 127.8 " 25.86 # 15.20 " 10.66 " 9.616" 20
21 8.457"2711 " 11.77 " 10.49 " 64.10 " 20.41 " 91.41 " 95.44 " 25.54 # 14.27 " 10.46 " 9.735" 21
22 8.296" 808.6 " 11.51 " 10.53 " 38.11 " 19.96 " 83.44 " 79.61 " 26.96 # 14.87 " 9.654# 9.702" 22
23 8.414" 382.2 " 156.8 " 10.98 " 33.68 " 19.63 " 70.01 " 67.11 " 23.90 # 15.05 " 9.023# 9.675" 23
24 8.396" 215.2 " 84.54 " 11.22 " 25.90 " 19.57 " 56.81 " 61.77 " 20.99 # 14.75 " 9.022# 9.485" 24
25 8.336" 138.3 " 37.88 " 11.40 " 21.84 " 22.05 " 46.95 " 58.84 " 19.45 # 15.95 " 9.284# 9.263" 25
26 8.265" 92.43 " 24.70 " 11.35 " 19.62 " 20.99 " 44.70 " 47.04 " 20.04 # 18.36 " 9.802# 8.886" 26
27 8.279" 69.31 " 18.90 " 12.27 " 18.21 " 19.76 " 41.93 " 39.74 " 23.25 # 20.95 " 10.17 # 8.513" 27
28 8.292" 65.14 " 15.83 " 12.75 " 17.24 " 27.12 " 48.99 " 34.91 " 23.28 # 33.63 " 10.07 # 8.427" 28
29 9.840" 14.00 " 12.50 " 16.58 "1381 " 131.4 " 31.76 " 22.08 " 45.52 " 9.788# 8.762" 29
30 11.17 " 12.67 " 11.51 " 159.5 " 965.7 " 174.1 " 29.68 " 21.31 " 25.31 " 9.693# 9.300" 30
31 10.45 " 11.58 " 1028 " 166.7 " 28.15 " 18.64 " 10.61 " 31
Mean 10.28 " 325.4 " 39.42 " 11.19 " 62.28 " 128.7 " 119.6 " 124.7 " 26.42 # 19.67 " 12.72 # 9.661#
Median 8.775" 80.87 " 17.05 " 11.17 " 16.57 " 23.61 " 91.41 " 105.7 " 23.56 # 17.70 " 11.93 # 9.545#
Maximum 23.66 "2711 " 214.2 " 12.75 "1028 "1381 " 439.5 " 327.1 " 51.91 # 45.52 " 21.97 # 10.65 #
Minimum 8.265" 7.832" 11.51 " 10.32 " 10.87 " 19.57 " 35.23 " 28.15 " 18.60 # 14.27 " 9.022# 8.427#
Total 318.6 "9111 "1222 " 335.7 "1931 "3860 "3707 "3867 " 792.6 # 609.9 " 381.6 # 299.5 #
Summaries ------------------ Notes -------------------
--------- All recorded data is continuous and reliable
except where the following tags are used...
Annual Mean 72.43 # " ... Relative Uncertainty +/-10%
Ann. Median 18.16 # # ... Relative Uncertainty +/-15%
Annual Total 26437 #
Maximum Minimum
Daily 2711 # 7.832#
Department of Water and Environmental Regulation HYDAY V146 Output 14/05/2026
Site 701009 Irwin River - Mountain Bridge Year 2012
VarFrom 10.00 Stage - SL in Metres Table Type Total
VarTo 151.00 Stream Discharge Volume in Megalitres
Figures are for period ending 24:00
Day Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec Day
1 11.50 " 11.93 # 8.674" 10.28 " 13.51 " 12.75 " 23.34 " 30.12 " 18.28 " 14.38 " 10.79 " 12.13 " 1
2 10.77 " 14.78 " 8.773" 10.68 " 12.09 " 13.05 " 21.99 " 26.11 " 17.95 " 14.24 " 10.95 " 11.42 " 2
3 9.911" 14.80 " 8.853" 10.74 " 12.19 " 12.77 " 21.01 " 24.87 " 17.89 " 14.46 " 11.14 " 10.57 " 3
4 9.356" 13.35 " 8.821" 11.43 " 13.79 " 12.36 " 20.32 " 25.70 " 22.75 " 14.32 " 13.95 " 10.53 " 4
5 9.367" 10.14 " 8.810" 12.09 " 15.10 " 12.19 " 19.79 " 24.61 " 23.77 " 13.96 " 14.50 " 10.54 " 5
6 9.541" 9.564" 8.593" 11.59 " 15.65 " 15.02 " 19.50 " 22.98 " 22.55 " 13.55 " 13.84 " 10.84 " 6
7 9.587" 8.994" 8.705" 10.79 " 15.65 " 19.19 " 19.38 " 26.28 " 21.25 " 13.65 " 12.78 " 10.69 " 7
8 9.328" 9.003" 8.948" 10.73 " 16.06 " 19.62 " 19.84 " 25.43 " 19.41 " 13.26 " 12.03 " 10.38 " 8
9 8.994" 9.077" 8.782" 10.81 " 15.25 " 18.07 " 19.67 " 22.75 " 17.89 " 12.77 " 11.22 " 9.941" 9
10 8.607" 9.116" 8.654" 10.47 " 14.05 " 28.01 " 28.52 " 21.69 " 17.64 " 11.87 " 11.05 " 10.22 " 10
11 8.778" 9.288" 8.539" 10.05 " 13.54 " 605.4 " 128.3 " 21.18 " 17.94 " 11.39 " 10.88 " 60.88 " 11
12 10.27 " 9.520" 8.480" 9.882" 13.01 " 282.7 " 196.1 " 21.49 " 17.16 " 11.71 " 10.35 " 216.4 " 12
13 10.45 " 9.666" 8.836" 10.15 " 12.90 " 163.0 " 118.7 " 26.21 " 16.21 " 11.93 " 10.14 " 91.53 " 13
14 10.55 " 9.570" 8.797" 10.48 " 13.08 " 107.3 " 71.69 " 24.15 " 15.98 " 12.61 " 10.21 " 52.39 " 14
15 10.67 " 9.639" 8.766" 10.71 " 13.12 " 86.65 " 47.47 " 22.53 " 15.71 " 12.59 " 10.15 " 34.07 " 15
16 10.70 " 9.715" 8.594" 10.87 " 13.20 " 73.24 " 35.61 " 22.06 " 15.18 " 12.50 " 10.03 " 25.37 " 16
17 10.54 " 9.696" 8.685" 10.99 " 12.97 " 56.29 " 30.29 " 21.24 " 15.15 " 13.35 " 10.09 " 20.08 " 17
18 10.08 " 9.678" 9.007" 11.21 " 12.64 " 43.49 " 26.83 " 20.38 " 17.24 " 13.16 " 10.15 " 16.91 " 18
19 10.70 " 9.754" 9.397" 11.47 " 12.33 " 38.50 " 24.38 " 20.14 " 17.86 " 12.74 " 10.04 " 14.92 " 19
20 10.77 " 9.338" 9.406" 11.49 " 12.19 " 39.34 " 22.75 " 20.12 " 16.95 " 12.39 " 10.10 " 13.29 " 20
21 11.80 " 9.185" 9.250" 11.25 " 12.37 " 98.95 " 21.69 " 21.87 " 16.60 " 12.17 " 10.08 " 12.36 " 21
22 196.4 " 9.372" 9.254" 11.21 " 12.31 " 118.6 " 21.17 " 22.13 " 16.98 " 13.63 " 10.58 " 11.98 " 22
23 63.76 # 9.523" 9.207" 11.19 " 12.05 " 62.89 " 21.56 " 21.12 " 16.06 " 14.12 " 10.79 " 11.57 " 23
24 32.19 # 9.476" 9.442" 10.88 " 11.70 " 42.18 " 21.51 " 20.30 " 15.70 " 12.59 " 10.71 " 11.09 " 24
25 31.01 # 9.506" 10.14 " 10.64 " 11.72 " 32.95 " 20.61 " 19.90 " 17.27 " 11.46 " 17.03 " 10.60 " 25
26 20.58 # 9.475" 10.53 " 10.57 " 11.91 " 31.77 " 20.01 " 19.64 " 19.67 " 10.84 " 18.68 " 10.10 " 26
27 19.04 # 9.370" 10.15 " 10.55 " 11.96 " 29.70 " 19.67 " 19.35 " 18.63 " 10.45 " 13.52 " 10.42 " 27
28 16.71 # 9.284" 9.942" 11.46 " 12.11 " 26.92 " 19.43 " 19.15 " 17.51 " 10.36 " 14.00 " 10.77 " 28
29 15.19 # 8.985" 9.974" 16.16 " 12.15 " 26.81 " 19.05 " 19.14 " 16.20 " 10.73 " 13.55 " 10.62 " 29
30 12.84 # 9.993" 14.80 " 12.03 " 25.18 " 18.61 " 18.67 " 15.40 " 11.00 " 12.98 " 9.974" 30
31 11.92 # 9.992" 12.19 " 20.54 " 18.28 " 10.87 " 9.899" 31
Mean 20.39 # 10.03 # 9.161" 11.19 " 13.06 " 71.83 " 36.75 " 22.24 " 17.83 " 12.55 " 11.88 " 24.92 "
Median 10.70 # 9.520# 8.853" 10.84 " 12.64 " 32.36 " 21.51 " 21.69 " 17.39 " 12.59 " 10.91 " 11.09 "
Maximum 196.4 # 14.80 # 10.53 " 16.16 " 16.06 " 605.4 " 196.1 " 30.12 " 23.77 " 14.46 " 18.68 " 216.4 "
Minimum 8.607# 8.985# 8.480" 9.882" 11.70 " 12.19 " 18.61 " 18.28 " 15.15 " 10.36 " 10.03 " 9.899"
Total 632.0 # 290.8 # 284.0 " 335.6 " 404.8 "2155 "1139 " 689.6 " 534.8 " 389.0 " 356.3 " 772.5 "
Summaries ------------------ Notes -------------------
--------- All recorded data is continuous and reliable
except where the following tags are used...
Annual Mean 21.81 # " ... Relative Uncertainty +/-10%
Ann. Median 12.69 # # ... Relative Uncertainty +/-15%
Annual Total 7984 #
Maximum Minimum
Daily 605.4 # 8.480#
Department of Water and Environmental Regulation HYDAY V146 Output 14/05/2026
Site 701009 Irwin River - Mountain Bridge Year 2013
VarFrom 10.00 Stage - SL in Metres Table Type Total
VarTo 151.00 Stream Discharge Volume in Megalitres
Figures are for period ending 24:00
Day Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec Day
1 10.27 " 7.308" 7.856" 10.58 " 10.92 " 24.41 " 14.59 " 19.51 " 83.62 " 21.03 " 11.69 " 10.77 " 1
2 10.61 " 7.292" 8.125" 10.33 " 11.80 " 25.29 " 14.56 " 18.98 " 57.97 " 20.04 " 11.65 " 10.68 " 2
3 10.74 " 7.461" 8.509" 10.24 " 12.78 " 22.57 " 14.68 " 18.52 " 44.02 " 19.04 " 11.41 " 10.37 " 3
4 10.57 " 7.804" 8.829" 10.22 " 12.36 " 20.29 " 15.17 " 18.01 " 39.33 " 18.16 " 11.07 " 9.981" 4
5 10.63 " 7.947" 9.004" 10.25 " 11.90 " 18.69 " 15.19 " 17.55 " 36.23 " 17.53 " 11.15 " 9.623" 5
6 10.59 " 8.032" 9.009" 10.38 " 11.80 " 17.80 " 14.95 " 17.62 " 31.31 " 17.03 " 11.21 " 9.468" 6
7 11.01 " 8.152" 8.886" 10.36 " 12.59 " 17.19 " 14.55 " 17.68 " 28.96 " 16.61 " 11.16 " 9.571" 7
8 10.72 " 8.082" 8.622" 10.25 " 31.21 " 16.73 " 14.33 " 18.44 " 27.29 " 16.24 " 10.88 " 9.793" 8
9 10.39 " 7.825" 8.469" 10.03 " 58.28 " 16.58 " 14.49 " 23.01 " 25.15 " 16.48 " 10.47 " 9.797" 9
10 9.708" 7.532" 10.08 " 10.06 " 375.7 " 16.58 " 14.71 " 23.67 " 23.35 " 17.08 " 10.07 " 9.609" 10
11 9.306" 8.022" 12.35 " 9.981" 140.3 " 16.40 " 16.39 " 22.31 " 22.61 " 16.95 " 9.807" 9.335" 11
12 9.417" 8.564" 11.77 " 10.01 " 77.23 " 15.90 " 21.56 " 21.82 " 22.89 " 16.65 " 9.781" 9.118" 12
13 10.23 " 8.826" 10.76 " 10.19 " 43.80 " 15.63 " 21.21 " 21.15 " 22.78 " 15.88 " 9.873" 8.917" 13
14 10.77 " 8.800" 10.14 " 10.61 " 31.54 " 15.71 " 19.72 " 20.30 " 25.31 " 15.20 " 9.978" 8.847" 14
15 9.874" 8.804" 11.20 " 10.82 " 26.09 " 15.91 " 19.46 " 19.56 " 31.86 " 14.58 " 9.944" 8.815" 15
16 9.762" 8.844" 11.32 " 10.98 " 22.81 " 16.13 " 19.90 " 19.75 " 33.53 " 14.26 " 9.805" 8.788" 16
17 9.691" 8.818" 10.60 " 12.17 " 21.07 " 16.07 " 21.35 " 19.98 " 41.27 " 14.18 " 9.911" 8.815" 17
18 9.177" 8.632" 10.51 " 12.44 " 20.02 " 15.82 " 20.79 " 19.82 " 43.69 " 14.05 " 10.11 " 9.060" 18
19 8.814" 8.343" 10.64 " 11.90 " 19.15 " 15.63 " 19.25 " 19.30 " 38.76 " 13.99 " 10.19 " 9.268" 19
20 8.541" 8.338" 10.44 " 11.28 " 20.71 " 15.62 " 18.14 " 18.90 " 34.55 " 15.49 " 9.897" 9.290" 20
21 8.630" 8.281" 10.12 " 11.04 " 24.46 " 15.32 " 17.73 " 18.23 " 31.46 " 16.33 " 9.764" 9.105" 21
22 8.585" 8.377" 9.922" 10.87 " 89.20 " 14.97 " 17.41 " 17.67 " 29.50 " 15.56 " 9.754" 8.910" 22
23 8.604" 8.469" 9.828" 10.92 " 81.09 " 14.85 " 16.87 " 17.04 " 28.47 " 14.43 " 9.938" 8.811" 23
24 8.551" 8.561" 9.838" 10.76 " 42.22 " 15.46 " 17.81 " 16.51 " 27.85 " 13.43 " 10.20 " 8.698" 24
25 8.265" 8.590" 10.06 " 10.97 " 30.41 " 16.13 " 18.36 " 16.93 " 27.04 " 12.96 " 10.31 " 8.740" 25
26 7.982" 8.577" 15.17 " 11.14 " 25.27 " 16.59 " 19.90 " 24.16 " 27.14 " 12.89 " 10.20 " 8.846" 26
27 7.838" 8.347" 14.87 " 11.02 " 21.94 " 16.50 " 24.39 " 29.54 " 26.41 " 12.82 " 10.20 " 8.957" 27
28 7.713" 7.913" 12.35 " 11.09 " 20.04 " 15.82 " 24.38 " 50.34 " 24.89 " 12.46 " 10.22 " 9.044" 28
29 7.556" 11.38 " 11.00 " 19.04 " 15.28 " 22.85 " 154.8 " 23.33 " 12.01 " 10.27 " 8.988" 29
30 7.543" 11.17 " 10.84 " 19.43 " 14.86 " 21.55 " 210.2 " 22.11 " 11.84 " 10.63 " 8.974" 30
31 7.580" 10.93 " 22.36 " 20.38 " 128.1 " 11.68 " 9.039" 31
Mean 9.344" 8.234" 10.41 " 10.76 " 44.12 " 17.02 " 18.28 " 34.82 " 32.76 " 15.38 " 10.38 " 9.291"
Median 9.417" 8.340" 10.14 " 10.79 " 22.36 " 16.10 " 18.14 " 19.56 " 28.71 " 15.49 " 10.20 " 9.060"
Maximum 11.01 " 8.844" 15.17 " 12.44 " 375.7 " 25.29 " 24.39 " 210.2 " 83.62 " 21.03 " 11.69 " 10.77 "
Minimum 7.543" 7.292" 7.856" 9.981" 10.92 " 14.85 " 14.33 " 16.51 " 22.11 " 11.68 " 9.754" 8.698"
Total 289.7 " 230.5 " 322.8 " 322.7 "1368 " 510.7 " 566.6 "1079 " 982.7 " 476.9 " 311.5 " 288.0 "
Summaries ------------------ Notes -------------------
--------- All recorded data is continuous and reliable
except where the following tags are used...
Annual Mean 18.49 " " ... Relative Uncertainty +/-10%
Ann. Median 12.17 "
Annual Total 6749 "
Maximum Minimum
Daily 375.7 " 7.292"
Department of Water and Environmental Regulation HYDAY V146 Output 14/05/2026
Site 701009 Irwin River - Mountain Bridge Year 2014
VarFrom 10.00 Stage - SL in Metres Table Type Total
VarTo 151.00 Stream Discharge Volume in Megalitres
Figures are for period ending 24:00
Day Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec Day
1 9.125" 8.601" 8.026# 10.37 # 117.8 " 19.64 " 18.93 " 22.88 " 21.87 " 21.59 " 12.77 " 30.90 " 1
2 9.152" 8.804" 8.016# 10.46 # 71.83 " 19.37 " 21.28 " 22.15 " 20.97 " 20.70 " 12.65 " 24.18 " 2
3 9.162" 8.790" 7.969# 10.44 # 47.76 " 19.12 " 24.07 " 21.67 " 21.45 " 20.44 " 12.41 " 20.41 " 3
4 9.171" 8.617" 8.104# 10.39 # 35.13 " 18.75 " 22.33 " 21.04 " 21.38 " 20.06 " 12.10 " 18.08 " 4
5 9.097" 8.377# 8.269# 10.37 # 30.55 " 18.41 " 21.33 " 20.52 " 20.76 " 20.00 " 11.91 " 16.53 " 5
6 9.016" 8.262# 8.313# 10.36 # 27.78 " 17.89 " 21.18 " 19.98 " 20.72 " 19.76 " 12.03 " 15.28 " 6
7 8.989" 8.279# 8.377# 10.42 # 269.6 " 17.50 " 22.89 " 20.02 " 22.91 " 19.17 " 12.33 " 14.58 " 7
8 9.034" 8.328# 8.508# 10.50 # 290.1 " 17.39 " 25.84 " 20.29 " 30.44 " 18.59 " 12.03 " 13.90 " 8
9 9.075" 8.311# 8.580# 10.55 # 726.3 " 17.45 " 24.57 " 20.15 " 27.57 " 18.52 " 11.60 " 13.21 " 9
10 9.113" 8.345# 8.657# 10.58 # 474.8 " 19.23 " 22.68 " 19.56 " 24.58 " 18.47 " 11.81 " 12.53 " 10
11 9.063" 8.424# 8.755# 10.61 # 256.7 " 19.08 " 21.76 " 19.16 " 27.97 " 17.32 " 12.00 " 11.88 " 11
12 8.842" 8.486# 8.776# 10.56 # 149.3 " 18.34 " 21.11 " 18.82 " 28.58 " 16.41 " 11.89 " 11.48 " 12
13 8.775" 8.521# 8.823# 10.60 # 109.6 " 17.96 " 20.72 " 18.30 " 24.45 " 15.89 " 11.49 " 11.25 " 13
14 8.814" 8.480# 8.910# 10.58 # 80.37 " 17.63 " 22.10 " 17.70 " 21.95 " 15.18 " 11.14 " 11.18 " 14
15 8.888" 8.467# 8.967# 10.55 # 57.94 " 17.28 " 24.84 " 17.42 " 20.27 " 14.72 " 10.85 " 10.99 " 15
16 8.990" 8.514# 9.042# 10.56 # 44.38 " 17.06 " 23.69 " 17.31 " 19.07 " 14.76 " 11.00 " 10.92 " 16
17 9.035" 8.514# 9.095# 10.53 # 36.13 " 19.26 " 22.34 " 17.07 " 18.12 " 14.85 " 11.17 " 10.87 " 17
18 8.938" 8.458# 9.157# 10.45 # 31.21 " 28.47 " 21.43 " 22.87 " 17.57 " 14.96 " 11.48 " 10.62 " 18
19 8.777" 8.382# 9.268# 10.50 # 34.22 " 25.43 " 21.60 " 22.64 " 17.13 " 14.80 " 11.69 " 10.34 " 19
20 8.536" 8.222# 9.306# 10.68 # 47.68 " 22.68 " 32.95 " 22.21 " 16.39 " 14.50 " 11.48 " 10.70 " 20
21 8.175" 8.067# 9.363# 10.76 # 36.20 " 22.10 " 40.49 " 22.87 " 20.93 " 14.22 " 11.44 " 10.57 " 21
22 7.927" 8.024# 9.412# 10.58 # 30.58 " 27.43 " 33.85 " 23.49 " 49.31 " 14.10 " 11.49 " 10.14 " 22
23 8.150" 7.971# 9.430# 10.37 # 29.81 " 25.21 " 34.88 " 22.67 " 35.77 " 14.55 " 11.28 " 9.691" 23
24 8.318" 8.000# 9.451# 10.33 # 28.00 " 22.52 " 34.85 " 21.36 " 71.81 " 14.27 " 10.82 " 9.202" 24
25 8.394" 8.013# 9.481# 14.46 # 26.07 " 21.31 " 31.18 " 20.86 " 61.10 " 14.03 " 10.43 " 8.946" 25
26 8.451" 8.025# 9.506# 17.54 # 24.97 " 22.35 " 28.03 " 20.26 " 39.26 " 13.80 " 10.51 " 8.704" 26
27 8.519" 8.089# 9.669# 23.83 # 23.40 " 21.29 " 28.28 " 19.71 " 31.26 " 13.59 " 11.65 " 8.624" 27
28 8.551" 8.108# 9.825# 459.1 # 22.85 " 20.41 " 26.69 " 19.11 " 28.06 " 13.53 " 216.7 " 8.644" 28
29 8.489" 9.902# 483.2 " 21.67 " 19.75 " 25.11 " 18.66 " 25.42 " 13.66 " 104.7 " 8.799" 29
30 8.312" 10.14 # 231.6 " 20.68 " 19.29 " 24.17 " 22.37 " 23.35 " 13.38 " 48.71 " 8.943" 30
31 8.309" 10.28 # 20.20 " 23.70 " 23.42 " 13.09 " 9.150" 31
Mean 8.748" 8.339# 9.012# 49.39 # 104.0 " 20.32 " 25.45 " 20.53 " 27.68 " 16.22 " 22.79 " 12.62 "
Median 8.842" 8.361# 9.042# 10.55 # 36.13 " 19.27 " 23.70 " 20.29 " 23.13 " 14.85 " 11.67 " 10.92 "
Maximum 9.171" 8.804# 10.28 # 483.2 # 726.3 " 28.47 " 40.49 " 23.49 " 71.81 " 21.59 " 216.7 " 30.90 "
Minimum 7.927" 7.971# 7.969# 10.33 # 20.20 " 17.06 " 18.93 " 17.07 " 16.39 " 13.09 " 10.43 " 8.624"
Total 271.2 " 233.5 # 279.4 #1482 #3224 " 609.6 " 788.9 " 636.5 " 830.4 " 502.9 " 683.6 " 391.2 "
Summaries ------------------ Notes -------------------
--------- All recorded data is continuous and reliable
except where the following tags are used...
Annual Mean 27.21 # " ... Relative Uncertainty +/-10%
Ann. Median 14.85 # # ... Relative Uncertainty +/-15%
Annual Total 9932 #
Maximum Minimum
Daily 726.3 # 7.927#
Department of Water and Environmental Regulation HYDAY V146 Output 14/05/2026
Site 701009 Irwin River - Mountain Bridge Year 2015
VarFrom 10.00 Stage - SL in Metres Table Type Total
VarTo 151.00 Stream Discharge Volume in Megalitres
Figures are for period ending 24:00
Day Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec Day
1 9.251" 8.976" 9.475" 25.95 " 15.10 " 13.95 " 17.29 "1397 " 21.29 " 12.36 " 10.96 " 8.634" 1
2 9.189" 20.08 "4695 $ 23.91 " 14.88 " 15.01 " 17.20 " 711.0 " 20.20 " 11.96 " 11.54 " 8.448" 2
3 9.191" 29.52 "9362 $ 22.48 " 14.93 " 15.63 " 17.36 " 350.4 " 19.84 " 11.90 " 10.99 " 8.765" 3
4 9.033" 23.42 "1237 " 21.42 " 14.75 " 15.49 " 17.31 " 215.4 " 19.58 " 11.96 " 10.65 " 9.194" 4
5 9.183" 95.69 " 461.3 " 20.62 " 14.24 " 14.97 " 17.17 " 154.4 " 20.26 " 12.36 " 10.64 " 9.665" 5
6 9.431" 110.0 " 245.0 " 19.67 " 13.91 " 15.01 " 17.17 " 108.0 " 19.52 " 12.10 " 11.25 " 9.757" 6
7 9.245" 55.12 " 158.6 " 21.20 " 13.55 " 15.08 " 17.42 " 85.23 " 18.75 " 11.38 " 10.95 " 9.627" 7
8 8.856" 33.33 " 111.8 " 22.44 " 13.41 " 14.65 " 17.47 " 66.98 " 18.00 " 11.30 " 76.44 " 9.305" 8
9 8.438" 25.04 " 80.71 " 27.52 " 13.37 " 14.08 " 16.61 " 56.41 " 17.32 " 11.44 " 79.96 " 9.183" 9
10 8.094" 19.89 " 61.34 " 24.57 " 13.40 " 13.62 " 16.41 " 100.5 " 17.34 " 10.87 " 34.27 " 9.159" 10
11 8.086" 16.63 " 47.86 " 23.17 " 13.21 " 13.40 " 16.42 " 83.70 " 17.60 " 10.54 " 22.06 " 8.887" 11
12 8.100" 14.54 " 38.84 " 23.79 " 13.15 " 13.92 " 15.86 " 61.32 " 19.87 " 10.49 " 16.31 " 8.786" 12
13 8.264" 13.26 " 33.55 " 32.37 " 12.96 " 14.31 " 15.30 " 44.74 " 19.99 " 10.57 " 13.02 " 8.938" 13
14 8.598" 12.46 " 32.06 " 44.95 " 12.74 " 14.39 " 15.26 " 36.76 " 18.80 " 10.83 " 11.61 " 8.980" 14
15 8.730" 11.54 "5615 " 40.68 " 12.50 " 14.61 " 15.04 " 32.07 " 17.88 " 11.16 " 10.88 " 9.031" 15
16 8.556" 10.96 "2856 " 36.85 " 14.30 " 14.41 " 14.73 " 29.36 " 16.90 " 10.74 " 10.20 " 9.059" 16
17 8.368" 10.78 " 799.3 " 35.70 " 20.11 " 14.35 " 14.54 " 28.25 " 16.30 " 10.63 " 9.885" 9.056" 17
18 8.482" 10.19 " 419.2 " 30.53 " 20.01 " 15.23 " 14.53 " 27.69 " 15.74 " 10.61 " 10.20 " 9.076" 18
19 8.563" 9.751" 243.7 " 25.95 " 18.90 " 16.31 " 14.23 " 26.35 " 15.73 " 10.93 " 9.858" 8.990" 19
20 8.566" 9.595" 154.2 " 22.21 " 17.11 " 17.32 " 16.43 " 26.45 " 15.18 " 10.58 " 9.497" 8.763" 20
21 8.407" 9.616" 110.9 " 19.92 " 15.70 " 27.64 " 155.2 " 26.35 " 14.20 " 10.47 " 9.174" 8.619" 21
22 8.443" 9.628" 82.76 " 18.44 " 15.11 " 27.80 " 605.9 " 27.91 " 13.61 " 10.74 " 9.023" 8.642" 22
23 8.289" 9.345" 60.04 " 17.34 " 15.07 " 97.54 " 299.0 " 26.07 " 13.11 " 10.69 " 9.384" 8.825" 23
24 8.120" 9.344" 45.92 " 16.17 " 15.18 " 46.47 " 170.4 " 25.26 " 12.81 " 10.56 " 9.649" 8.751" 24
25 8.098" 9.455" 37.38 " 15.16 " 15.16 " 30.28 " 106.4 " 24.24 " 12.99 " 10.48 " 9.292" 8.411" 25
26 7.936" 9.584" 51.58 " 14.92 " 14.92 " 24.29 " 73.94 " 23.32 " 12.99 " 10.37 " 8.922" 7.966" 26
27 7.912" 9.653" 37.36 " 14.64 " 14.76 " 21.01 " 51.78 " 22.31 " 12.81 " 10.39 " 8.769" 7.743" 27
28 8.080" 9.497" 30.81 " 14.38 " 14.45 " 19.10 " 41.32 " 21.55 " 12.64 " 10.66 " 8.985" 7.452" 28
29 8.394" 27.43 " 15.32 " 14.10 " 18.11 " 36.17 " 21.19 " 12.71 " 10.65 " 9.171" 7.878" 29
30 8.436" 29.11 " 15.06 " 14.09 " 17.52 " 33.94 " 21.46 " 12.59 " 10.49 " 9.065" 8.381" 30
31 8.451" 29.25 " 14.05 " 71.57 " 21.92 " 10.74 " 8.250" 31
Mean 8.542" 22.03 " 877.5 $ 23.58 " 14.81 " 20.85 " 63.53 " 125.9 " 16.55 " 11.00 " 16.09 " 8.781"
Median 8.443" 11.25 " 80.71 $ 22.32 " 14.45 " 15.15 " 17.29 " 29.36 " 17.11 " 10.74 " 10.42 " 8.825"
Maximum 9.431" 110.0 "9362 $ 44.95 " 20.11 " 97.54 " 605.9 "1397 " 21.29 " 12.36 " 79.96 " 9.757"
Minimum 7.912" 8.976" 9.475$ 14.38 " 12.50 " 13.40 " 14.23 " 21.19 " 12.59 " 10.37 " 8.769" 7.452"
Total 264.8 " 616.9 "27204 $ 707.3 " 459.1 " 625.5 " 1969 " 3903 " 496.5 " 340.9 " 482.6 " 272.2 "
Summaries ------------------ Notes -------------------
--------- All recorded data is continuous and reliable
except where the following tags are used...
Annual Mean 102.3 $ " ... Relative Uncertainty +/-10%
Ann. Median 14.88 $ $ ... Relative Uncertainty +/-20%
Annual Total 37342 $
Maximum Minimum
Daily 9362 $ 7.452$
Department of Water and Environmental Regulation HYDAY V146 Output 14/05/2026
Site 701009 Irwin River - Mountain Bridge Year 2016
VarFrom 10.00 Stage - SL in Metres Table Type Total
VarTo 151.00 Stream Discharge Volume in Megalitres
Figures are for period ending 24:00
Day Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec Day
1 7.724" 8.959" 8.923" 12.94 " 19.30 " 19.95 " 24.48 " 35.31 " 53.61 " 19.81 " 12.42 " 9.638" 1
2 7.819" 79.94 " 8.840" 11.40 " 16.53 " 18.95 " 25.55 " 35.36 " 43.81 " 19.55 " 12.18 " 9.687" 2
3 8.238" 70.65 " 8.945" 10.53 " 15.24 " 18.49 " 24.43 " 32.86 " 43.83 " 18.95 " 11.99 " 9.831" 3
4 8.810" 43.81 " 8.932" 10.17 " 14.61 " 19.46 " 22.92 " 33.62 " 38.98 " 18.40 " 11.80 " 10.09 " 4
5 9.530" 27.00 " 8.728" 9.998" 14.27 " 19.59 " 21.96 " 33.96 " 33.62 " 17.91 " 11.51 " 9.881" 5
6 9.661" 18.90 " 8.550" 9.524" 14.35 " 19.54 " 21.42 " 33.06 " 30.46 " 17.63 " 11.49 " 9.813" 6
7 9.259" 13.96 " 8.385" 9.388" 15.09 " 28.83 " 21.13 " 42.29 " 29.65 " 17.41 " 11.40 " 9.784" 7
8 9.183" 11.16 " 8.182" 10.78 " 14.74 " 56.31 " 24.44 " 44.15 " 28.32 " 19.45 " 11.57 " 9.527" 8
9 9.149" 10.01 " 8.086" 12.51 " 13.99 " 173.9 " 45.05 " 57.13 " 26.91 " 20.73 " 11.73 " 9.143" 9
10 9.027" 9.677" 8.104" 42.93 " 13.54 " 78.04 " 189.9 " 58.68 " 25.97 " 19.21 " 11.87 " 8.937" 10
11 9.086" 9.527" 8.276" 58.54 " 13.15 " 44.15 " 284.7 " 49.43 " 25.59 " 17.70 " 12.12 " 9.010" 11
12 9.031" 9.352" 8.482" 42.72 " 13.02 " 32.38 " 228.6 " 40.40 " 24.43 " 16.44 " 11.87 " 9.320" 12
13 8.688" 9.003" 8.612" 30.46 " 13.19 " 38.50 " 151.9 " 35.08 " 22.99 " 16.22 " 11.38 " 9.343" 13
14 7.999" 8.586" 8.474" 56.93 " 13.41 " 40.70 " 103.0 " 31.82 " 21.92 " 16.26 " 10.63 " 9.063" 14
15 7.846" 8.184" 8.724" 40.23 " 13.60 " 53.42 " 72.82 " 30.11 " 21.30 " 15.72 " 10.58 " 8.702" 15
16 7.785" 7.806" 8.890" 26.57 " 13.50 " 75.90 " 56.94 " 29.00 " 21.51 " 15.30 " 11.39 " 8.650" 16
17 7.876" 8.126" 8.928" 21.31 " 13.33 " 56.48 " 94.81 " 29.28 " 20.80 " 15.02 " 12.05 " 8.486" 17
18 9.283" 8.396" 9.377" 18.54 " 13.27 " 39.62 " 263.9 " 30.95 " 20.36 " 14.76 " 11.36 " 8.645" 18
19 10.96 " 8.645" 9.352" 17.63 " 13.32 " 32.32 " 399.9 " 29.82 " 22.04 " 14.66 " 11.02 " 8.820" 19
20 11.07 " 8.713" 9.213" 16.38 " 13.48 " 30.78 " 258.3 " 31.18 " 21.73 " 14.51 " 10.86 " 8.593" 20
21 10.33 " 8.894" 9.275" 14.71 " 17.61 " 37.42 " 171.9 " 32.66 " 20.94 " 13.91 " 10.68 " 8.224" 21
22 9.626" 8.971" 10.01 " 13.65 " 20.32 " 31.46 " 128.1 " 33.01 " 20.51 " 13.40 " 10.36 " 8.614" 22
23 9.108" 8.910" 9.836" 12.99 " 18.09 " 36.45 " 96.10 " 30.27 " 21.28 " 13.18 " 10.01 " 8.782" 23
24 8.934" 8.877" 9.315" 12.65 " 34.11 " 40.18 " 75.73 " 28.03 " 20.84 " 13.21 " 9.591" 8.707" 24
25 9.033" 8.708" 8.934" 13.22 " 38.72 " 32.87 " 61.27 " 27.83 " 20.37 " 13.22 " 9.352" 8.575" 25
26 9.291" 8.669" 10.71 " 18.05 " 36.75 " 29.19 " 50.99 " 26.90 " 19.68 " 13.22 " 9.119" 8.572" 26
27 9.372" 9.085" 10.98 " 18.44 " 55.80 " 26.90 " 43.73 " 41.77 " 19.45 " 13.19 " 9.206" 8.586" 27
28 8.813" 8.971" 10.33 " 17.67 " 34.63 " 25.35 " 38.92 " 53.93 " 19.45 " 13.15 " 9.439" 8.683" 28
29 8.495" 8.952" 13.42 " 21.46 " 28.78 " 26.89 " 35.81 " 46.98 " 19.01 " 13.15 " 9.477" 8.808" 29
30 8.948" 22.56 " 23.81 " 24.34 " 25.46 " 35.58 " 68.51 " 18.82 " 12.95 " 9.621" 8.980" 30
31 9.333" 16.59 " 21.61 " 34.67 " 58.55 " 12.75 " 8.999" 31
Mean 9.010" 15.88 " 9.870" 21.20 " 19.86 " 40.31 " 100.3 " 38.45 " 25.94 " 15.84 " 10.94 " 9.048"
Median 9.033" 8.971" 8.932" 17.00 " 14.74 " 32.35 " 56.94 " 33.62 " 21.82 " 15.30 " 11.37 " 8.937"
Maximum 11.07 " 79.94 " 22.56 " 58.54 " 55.80 " 173.9 " 399.9 " 68.51 " 53.61 " 20.73 " 12.42 " 10.09 "
Minimum 7.724" 7.806" 8.086" 9.388" 13.02 " 18.49 " 21.13 " 26.90 " 18.82 " 12.75 " 9.119" 8.224"
Total 279.3 " 460.5 " 306.0 " 636.1 " 615.7 "1209 "3109 "1192 " 778.2 " 491.0 " 328.1 " 280.5 "
Summaries ------------------ Notes -------------------
--------- All recorded data is continuous and reliable
except where the following tags are used...
Annual Mean 26.46 " " ... Relative Uncertainty +/-10%
Ann. Median 14.43 "
Annual Total 9685 "
Maximum Minimum
Daily 399.9 " 7.724"
Department of Water and Environmental Regulation HYDAY V146 Output 14/05/2026
Site 701009 Irwin River - Mountain Bridge Year 2017
VarFrom 10.00 Stage - SL in Metres Table Type Total
VarTo 151.00 Stream Discharge Volume in Megalitres
Figures are for period ending 24:00
Day Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec Day
1 8.727"1143 " 29.14 " 12.18 " 10.98 " 12.41 " 15.11 " 24.38 " 393.2 " 21.26 " 10.49 " 9.003" 1
2 8.328" 424.4 " 96.95 " 11.81 " 10.90 " 12.55 " 16.73 " 21.73 " 249.6 " 19.73 " 10.40 " 8.696" 2
3 8.077" 201.3 " 714.7 " 11.66 " 10.73 " 12.81 " 15.98 " 20.27 " 188.8 " 18.93 " 10.26 " 9.025" 3
4 8.498" 124.1 " 267.1 " 11.48 " 10.96 " 12.79 " 15.98 " 19.91 " 119.2 " 17.66 " 10.13 " 10.21 " 4
5 8.713" 85.78 " 135.1 " 11.23 " 11.47 " 12.42 " 16.06 " 19.47 " 82.96 " 16.53 " 9.578" 9.770" 5
6 8.602" 62.41 " 76.96 " 11.59 " 11.43 " 11.89 " 16.77 " 18.89 " 60.89 " 15.95 " 9.178" 9.303" 6
7 8.668" 48.44 " 51.70 " 11.75 " 11.10 " 11.78 " 16.47 " 18.48 " 45.00 " 16.09 " 9.090" 8.758" 7
8 8.633" 38.52 " 38.45 " 11.39 " 10.91 " 11.63 " 16.34 " 19.96 " 35.65 " 15.70 " 9.218" 8.442" 8
9 8.402" 34.36 " 32.04 " 11.02 " 11.55 " 11.41 " 15.55 " 44.03 " 30.57 " 15.45 " 9.532" 8.696" 9
10 8.207" 105.4 " 28.24 " 10.96 " 11.81 " 11.45 " 15.10 " 30.33 " 27.65 " 15.29 " 9.591" 10.20 " 10
11 8.266" 84.65 " 24.97 " 10.95 " 11.55 " 11.51 " 16.85 " 25.40 " 25.23 " 15.06 " 9.400" 9.260" 11
12 8.418" 56.16 " 23.23 " 11.18 " 11.52 " 11.54 " 17.35 " 25.84 " 23.28 " 14.29 " 10.02 " 9.583" 12
13 8.524" 43.29 " 21.44 " 11.50 " 11.63 " 11.77 " 16.45 " 26.99 " 21.43 " 13.75 " 10.19 " 9.579" 13
14 8.515"4969 $ 20.19 " 11.70 " 11.79 " 13.32 " 16.11 " 24.49 " 19.92 " 13.53 " 9.714" 9.085" 14
15 8.059"5305 " 18.90 " 11.85 " 12.26 " 14.16 " 16.13 " 26.05 " 19.18 " 13.51 " 8.891" 8.906" 15
16 8.309"1267 " 17.84 " 12.06 " 13.15 " 13.74 " 16.89 " 29.24 " 18.63 " 14.54 " 8.786" 8.981" 16
17 8.457" 591.8 " 17.34 " 12.13 " 12.83 " 13.20 " 16.26 " 24.81 " 18.16 " 15.16 " 9.298" 9.405" 17
18 8.277" 311.9 " 17.15 " 12.57 " 12.23 " 12.89 " 15.47 " 22.23 " 17.64 " 14.88 " 10.24 " 10.19 " 18
19 8.360" 275.6 " 16.48 " 12.59 " 12.96 " 12.68 " 17.00 " 21.67 " 17.33 " 13.49 " 9.909" 10.13 " 19
20 8.325" 462.4 " 15.58 " 12.16 " 16.26 " 12.80 " 18.07 " 21.30 " 17.14 " 12.40 " 9.580" 9.279" 20
21 8.308" 273.1 " 15.33 " 11.95 " 16.64 " 13.37 " 17.45 " 20.57 " 17.11 " 11.71 " 9.457" 8.923" 21
22 8.452" 134.0 " 15.57 " 11.64 " 16.84 " 16.17 " 18.57 " 19.70 " 17.86 " 12.83 " 9.050" 8.794" 22
23 8.466" 98.27 " 15.55 " 11.41 " 15.19 " 17.63 " 19.12 " 18.92 " 17.92 " 12.81 " 8.622" 8.816" 23
24 8.348" 71.11 " 15.20 " 11.30 " 14.42 " 16.39 " 18.75 " 18.55 " 20.78 " 12.44 " 8.569" 8.737" 24
25 8.176" 52.71 " 14.84 " 11.15 " 13.94 " 15.18 " 18.05 " 18.35 " 24.64 " 12.02 " 8.668" 8.791" 25
26 7.865" 42.02 " 14.51 " 10.87 " 13.58 " 14.39 " 17.49 " 18.05 " 27.43 " 11.96 " 8.904" 8.827" 26
27 7.784" 35.87 " 13.93 " 10.74 " 13.35 " 13.87 " 17.41 " 17.94 " 26.80 " 11.70 " 9.267" 8.688" 27
28 8.111" 31.59 " 13.63 " 10.69 " 13.00 " 13.57 " 20.09 " 18.10 " 27.97 " 11.54 " 9.531" 8.629" 28
29 9.726" 13.35 " 10.67 " 12.75 " 13.16 " 23.85 " 25.10 " 28.56 " 11.50 " 9.507" 8.372" 29
30 3368 $ 12.85 " 10.84 " 12.57 " 13.12 " 21.63 " 25.97 " 24.40 " 11.01 " 9.325" 8.201" 30
31 6499 $ 12.62 " 12.43 " 21.90 " 339.3 " 10.70 " 8.058" 31
Mean 326.1 $ 584.8 $ 58.74 " 11.50 " 12.67 " 13.19 " 17.45 " 33.10 " 55.50 " 14.31 " 9.480" 9.075"
Median 8.402$ 101.8 $ 17.84 " 11.49 " 12.26 " 12.85 " 16.85 " 21.67 " 24.94 " 13.75 " 9.482" 8.923"
Maximum 6499 $5305 $ 714.7 " 12.59 " 16.84 " 17.63 " 23.85 " 339.3 " 393.2 " 21.26 " 10.49 " 10.21 "
Minimum 7.784$ 31.59 $ 12.62 " 10.67 " 10.73 " 11.41 " 15.10 " 17.94 " 17.11 " 10.70 " 8.569" 8.058"
Total 10110 $16374 $ 1821 " 345.0 " 392.7 " 395.6 " 541.0 " 1026 " 1665 " 443.5 " 284.4 " 281.3 "
Summaries ------------------ Notes -------------------
--------- All recorded data is continuous and reliable
except where the following tags are used...
Annual Mean 92.27 $ " ... Relative Uncertainty +/-10%
Ann. Median 13.53 $ $ ... Relative Uncertainty +/-20%
Annual Total 33679 $
Maximum Minimum
Daily 6499 $ 7.784$
Department of Water and Environmental Regulation HYDAY V146 Output 14/05/2026
Site 701009 Irwin River - Mountain Bridge Year 2018
VarFrom 10.00 Stage - SL in Metres Table Type Total
VarTo 151.00 Stream Discharge Volume in Megalitres
Figures are for period ending 24:00
Day Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec Day
1 8.073" 8.977" 8.879" 10.92 " 10.76 " 17.20 " 16.55 " 46.38 " 46.17 " 15.83 " 12.42 " 9.932" 1
2 8.082" 9.410" 8.888" 10.65 " 10.81 " 16.42 " 19.61 " 51.66 " 40.85 " 15.52 " 12.44 " 9.914" 2
3 8.215" 9.448" 8.637" 10.75 " 10.72 " 15.83 " 55.40 " 120.5 " 33.92 " 14.79 " 12.50 " 9.829" 3
4 8.353" 9.138" 8.457" 10.94 " 10.66 " 16.27 " 229.8 " 212.8 " 30.99 " 15.23 " 12.34 " 9.947" 4
5 8.303" 9.373" 8.482" 10.96 " 10.52 " 18.85 " 192.1 " 188.3 " 29.53 " 15.26 " 12.32 " 9.977" 5
6 8.100" 9.416"1211 " 10.91 " 11.51 " 20.80 " 130.9 " 175.9 " 27.87 " 15.07 " 11.80 " 10.35 " 6
7 8.071" 9.068" 363.3 " 10.90 " 12.47 " 22.21 " 92.42 " 133.8 " 26.34 " 14.79 " 11.51 " 10.18 " 7
8 7.964" 8.968" 169.7 " 10.88 " 11.88 " 21.54 " 63.32 " 94.04 " 25.35 " 14.59 " 11.36 " 10.02 " 8
9 7.708" 8.919" 85.82 " 10.87 " 11.41 " 75.93 " 44.11 " 74.90 " 24.33 " 14.28 " 11.30 " 9.940" 9
10 8.107" 8.823" 59.38 " 10.82 " 10.83 " 58.56 " 35.05 " 74.46 " 23.52 " 14.32 " 11.68 " 9.891" 10
11 8.406" 8.769" 40.84 " 10.86 " 10.67 " 35.84 " 30.30 " 66.09 " 23.77 " 14.15 " 11.98 " 9.733" 11
12 8.282" 8.791" 33.05 " 10.87 " 10.64 " 27.86 " 27.52 " 85.69 " 22.46 " 14.29 " 11.68 " 9.715" 12
13 8.000" 8.804" 27.73 " 10.89 " 10.62 " 24.63 " 27.04 " 66.84 " 21.87 " 15.49 " 11.49 " 9.552" 13
14 8.350" 8.763" 23.45 " 10.76 " 10.75 " 21.74 " 25.65 " 57.41 " 21.16 " 16.79 " 10.99 " 9.261" 14
15 14.07 " 8.681" 20.38 " 10.61 " 10.36 " 19.94 " 24.72 " 49.05 " 20.33 " 15.27 " 11.55 " 9.939" 15
16 13.23 " 8.935" 18.40 " 10.34 " 10.12 " 18.78 " 23.75 " 41.19 " 19.73 " 14.57 " 13.31 " 10.92 " 16
17 73.56 " 9.038" 16.74 " 10.54 " 10.24 " 18.00 " 23.26 " 39.96 " 19.18 " 14.29 " 12.08 " 10.38 " 17
18 94.28 " 9.089" 15.22 " 10.74 " 10.29 " 19.98 " 22.71 " 38.91 " 18.64 " 14.73 " 11.43 " 9.950" 18
19 75.36 " 9.076" 14.29 " 10.83 " 10.37 " 20.58 " 22.06 " 34.72 " 18.38 " 14.73 " 10.82 " 9.605" 19
20 41.86 " 8.893" 13.69 " 10.86 " 10.42 " 19.16 " 21.56 " 31.75 " 18.02 " 14.26 " 10.43 " 9.215" 20
21 29.84 " 8.630" 13.22 " 10.89 " 10.43 " 18.47 " 22.51 " 30.11 " 17.57 " 14.05 " 10.22 " 8.926" 21
22 22.94 " 8.696" 12.85 " 11.12 " 10.44 " 17.90 " 30.31 " 28.88 " 17.40 " 13.86 " 10.27 " 10.07 " 22
23 18.11 " 8.807" 12.65 " 11.33 " 10.53 " 17.43 " 46.88 " 27.25 " 17.38 " 13.43 " 10.91 " 9.450" 23
24 14.58 " 8.698" 12.06 " 11.07 " 11.10 " 17.07 " 127.7 " 25.94 " 17.18 " 13.57 " 10.67 " 9.278" 24
25 12.52 " 8.632" 11.75 " 10.86 " 19.69 " 16.76 " 107.4 " 25.04 " 16.89 " 13.55 " 10.62 " 9.112" 25
26 11.52 " 9.512" 12.38 " 10.79 " 21.84 " 16.47 " 83.11 " 24.31 " 16.52 " 13.17 " 10.58 " 8.898" 26
27 10.92 " 9.602" 12.67 " 10.95 " 63.71 " 17.08 " 62.77 " 23.63 " 16.15 " 12.89 " 10.16 " 8.901" 27
28 10.45 " 9.013" 11.97 " 10.85 " 36.72 " 18.17 " 72.80 " 23.62 " 15.53 " 12.50 " 9.990" 9.072" 28
29 9.725" 11.51 " 10.48 " 25.58 " 17.58 " 69.49 " 26.42 " 15.27 " 12.14 " 10.02 " 9.178" 29
30 9.161" 11.35 " 10.34 " 20.45 " 17.06 " 62.44 " 29.84 " 16.41 " 12.12 " 9.994" 9.287" 30
31 9.025" 11.21 " 18.22 " 48.83 " 34.36 " 12.28 " 9.311" 31
Mean 18.88 " 8.999" 73.88 " 10.82 " 14.99 " 22.80 " 60.07 " 63.99 " 22.62 " 14.25 " 11.30 " 9.669"
Median 9.161" 8.951" 13.22 " 10.86 " 10.75 " 18.63 " 44.11 " 41.19 " 20.03 " 14.29 " 11.39 " 9.733"
Maximum 94.28 " 9.602"1211 " 11.33 " 63.71 " 75.93 " 229.8 " 212.8 " 46.17 " 16.79 " 13.31 " 10.92 "
Minimum 7.708" 8.630" 8.457" 10.34 " 10.12 " 15.83 " 16.55 " 23.62 " 15.27 " 12.12 " 9.990" 8.898"
Total 585.2 " 252.0 "2290 " 324.6 " 464.8 " 684.1 "1862 "1984 " 678.7 " 441.8 " 338.9 " 299.7 "
Summaries ------------------ Notes -------------------
--------- All recorded data is continuous and reliable
except where the following tags are used...
Annual Mean 27.96 " " ... Relative Uncertainty +/-10%
Ann. Median 12.89 "
Annual Total 10206 "
Maximum Minimum
Daily 1211 " 7.708"
Department of Water and Environmental Regulation HYDAY V146 Output 14/05/2026
Site 701009 Irwin River - Mountain Bridge Year 2019
VarFrom 10.00 Stage - SL in Metres Table Type Total
VarTo 151.00 Stream Discharge Volume in Megalitres
Figures are for period ending 24:00
Day Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec Day
1 9.405" 8.122" 9.263" 9.534" 11.15 " 11.73 " 118.2 " 26.73 " 23.46 " 15.63 " 12.96 " 8.631" 1
2 9.497" 8.320" 9.083" 9.820" 11.06 " 11.46 " 81.09 " 25.72 " 23.55 " 15.31 " 12.88 " 8.639" 2
3 9.784" 8.247" 9.043" 9.721" 10.90 " 11.42 " 60.93 " 25.09 " 24.66 " 15.02 " 12.54 " 8.769" 3
4 9.530" 7.999" 9.416" 9.778" 11.40 " 11.43 " 53.70 " 24.89 " 24.13 " 15.16 " 12.06 " 8.891" 4
5 9.210" 7.866" 9.590" 9.685" 12.07 " 11.46 "1126 " 24.54 " 22.62 " 15.87 " 11.71 " 8.914" 5
6 9.180" 8.094" 9.429" 9.563" 12.04 " 11.58 "1215 " 25.03 " 21.37 " 15.36 " 11.38 " 8.906" 6
7 9.062" 8.230" 9.784" 9.626" 11.73 " 18.00 " 525.4 " 24.11 " 20.62 " 14.59 " 11.03 " 9.131" 7
8 9.060" 7.859" 10.23 " 9.655" 11.53 " 20.19 " 274.0 " 23.57 " 20.05 " 13.89 " 10.61 " 9.268" 8
9 9.062" 7.395" 10.44 " 9.581" 11.14 " 24.80 " 172.5 " 23.41 " 19.37 " 13.87 " 10.16 " 9.204" 9
10 9.035" 7.520" 9.859" 9.839" 11.13 " 23.79 " 122.5 " 23.22 " 19.01 " 13.85 " 10.41 " 8.991" 10
11 8.948" 7.842" 9.589" 10.13 " 11.04 " 104.1 " 94.32 " 22.87 " 18.93 " 13.84 " 10.60 " 8.774" 11
12 8.987" 8.162" 9.581" 10.25 " 11.15 " 123.7 " 76.16 " 22.18 " 18.72 " 15.11 " 9.780" 8.479" 12
13 9.071" 8.230" 9.720" 10.37 " 11.32 " 122.0 " 64.07 " 22.36 " 18.36 " 14.48 " 9.368" 8.242" 13
14 9.090" 8.071" 9.550" 10.53 " 11.30 " 68.85 " 55.38 " 25.13 " 17.98 " 14.19 " 9.263" 8.213" 14
15 9.069" 8.387" 9.602" 11.13 " 11.18 " 42.22 " 48.28 " 27.03 " 17.85 " 13.77 " 9.655" 8.193" 15
16 9.125" 8.665" 9.733" 12.10 " 11.53 " 32.07 " 42.78 " 25.53 " 17.36 " 13.32 " 9.809" 8.627" 16
17 9.188" 8.625" 9.760" 11.71 " 11.97 " 27.22 " 38.97 " 29.87 " 17.37 " 13.02 " 9.910" 8.979" 17
18 9.067" 8.359" 9.904" 11.31 " 11.92 " 24.03 " 35.87 " 29.52 " 17.30 " 12.74 " 10.05 " 9.160" 18
19 8.698" 8.382" 10.10 " 11.56 " 12.00 " 21.91 " 34.44 " 26.64 " 17.90 " 12.17 " 10.22 " 9.452" 19
20 8.434" 8.714" 10.13 " 11.67 " 12.62 " 20.59 " 35.74 " 25.50 " 17.29 " 12.48 " 10.09 " 9.518" 20
21 8.546" 8.863" 10.32 " 11.30 " 13.01 " 19.92 " 34.45 " 24.71 " 16.71 " 12.58 " 9.916" 9.404" 21
22 8.939" 8.970" 10.39 " 10.99 " 12.59 " 19.51 " 42.16 " 23.64 " 16.14 " 12.64 " 9.838" 9.501" 22
23 9.083" 9.045" 9.995" 10.83 " 12.54 " 27.88 " 51.38 " 24.38 " 15.67 " 12.51 " 9.753" 9.640" 23
24 9.383" 9.022" 9.557" 10.74 " 12.52 " 33.69 " 42.91 " 23.79 " 15.36 " 12.38 " 9.737" 9.637" 24
25 9.276" 8.954" 9.280" 10.58 " 12.53 " 162.9 " 37.94 " 22.89 " 15.46 " 12.15 " 9.740" 9.748" 25
26 8.885" 8.962" 9.124" 10.40 " 12.38 " 108.7 " 35.60 " 22.08 " 15.56 " 11.96 " 9.398" 9.763" 26
27 8.277" 9.118" 9.222" 10.28 " 12.00 " 110.1 " 33.42 " 21.59 " 15.54 " 11.65 " 9.210" 9.630" 27
28 8.002" 9.431" 9.351" 10.29 " 11.90 " 430.2 " 31.52 " 21.31 " 15.52 " 11.71 " 9.210" 9.505" 28
29 8.055" 9.219" 10.79 " 11.86 " 246.1 " 30.17 " 21.10 " 15.51 " 11.87 " 9.058" 9.517" 29
30 8.362" 8.890" 11.13 " 11.60 " 184.2 " 29.05 " 24.50 " 15.44 " 11.89 " 8.826" 9.492" 30
31 8.174" 8.923" 11.64 " 27.90 " 24.58 " 12.93 " 9.384" 31
Mean 8.951" 8.409" 9.615" 10.50 " 11.77 " 69.53 " 150.7 " 24.44 " 18.49 " 13.48 " 10.31 " 9.103"
Median 9.062" 8.339" 9.589" 10.39 " 11.73 " 26.01 " 48.28 " 24.50 " 17.88 " 13.32 " 9.913" 9.160"
Maximum 9.784" 9.431" 10.44 " 12.10 " 13.01 " 430.2 "1215 " 29.87 " 24.66 " 15.87 " 12.96 " 9.763"
Minimum 8.002" 7.395" 8.890" 9.534" 10.90 " 11.42 " 27.90 " 21.10 " 15.36 " 11.65 " 8.826" 8.193"
Total 277.5 " 235.5 " 298.1 " 314.9 " 364.8 "2086 "4672 " 757.5 " 554.8 " 418.0 " 309.2 " 282.2 "
Summaries ------------------ Notes -------------------
--------- All recorded data is continuous and reliable
except where the following tags are used...
Annual Mean 28.96 " " ... Relative Uncertainty +/-10%
Ann. Median 11.40 "
Annual Total 10570 "
Maximum Minimum
Daily 1215 " 7.395"
Department of Water and Environmental Regulation HYDAY V146 Output 14/05/2026
Site 701009 Irwin River - Mountain Bridge Year 2020
VarFrom 10.00 Stage - SL in Metres Table Type Total
VarTo 151.00 Stream Discharge Volume in Megalitres
Figures are for period ending 24:00
Day Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec Day
1 9.389" 8.721" 49.50 " 11.47 " 11.81 " 15.50 " 25.26 " 19.35 " 26.74 " 17.21 " 15.36 " 10.76 " 1
2 9.439" 8.535" 33.91 " 11.50 " 11.63 " 15.13 " 22.67 " 19.14 " 26.01 " 17.21 " 16.99 " 10.61 " 2
3 9.469" 8.167" 27.35 " 11.43 " 11.61 " 14.77 " 20.82 " 19.88 " 25.23 " 16.90 " 15.96 " 10.61 " 3
4 9.273" 8.397" 22.97 " 11.21 " 12.27 " 14.73 " 19.61 " 22.65 " 24.54 " 16.29 " 14.59 " 10.66 " 4
5 9.065" 8.578" 19.95 " 11.33 " 13.89 " 14.60 " 19.12 " 22.05 " 24.25 " 15.77 " 13.51 " 10.62 " 5
6 8.936" 8.787" 17.91 " 11.29 " 13.98 " 14.29 " 18.94 " 20.70 " 24.25 " 15.38 " 12.75 " 10.45 " 6
7 8.910" 8.889" 16.52 " 11.35 " 13.51 " 14.37 " 18.74 " 20.14 " 25.48 " 15.20 " 12.27 " 10.17 " 7
8 9.011" 8.933" 15.71 " 11.39 " 13.63 " 14.28 " 18.81 " 19.57 " 24.98 " 15.49 " 12.41 " 9.840" 8
9 8.961" 8.841" 15.08 " 11.30 " 13.42 " 13.99 " 18.65 " 24.79 " 23.96 " 15.62 " 14.19 " 10.18 " 9
10 8.719" 8.660" 14.18 " 11.13 " 13.04 " 13.92 " 18.16 " 51.75 " 23.54 " 15.52 " 16.60 " 10.31 " 10
11 8.456" 8.662" 13.45 " 10.95 " 12.87 " 14.43 " 17.68 " 336.9 " 23.09 " 15.26 " 15.73 " 10.22 " 11
12 8.496" 8.662" 13.24 " 11.29 " 12.71 " 16.77 " 17.18 " 201.1 " 22.36 " 15.09 " 14.92 " 10.29 " 12
13 8.584" 8.757" 13.25 " 11.46 " 12.40 " 17.22 " 17.11 " 148.3 " 21.53 " 14.95 " 14.76 " 10.50 " 13
14 8.583" 8.932" 12.91 " 11.21 " 12.23 " 16.51 " 19.00 " 107.9 " 20.73 " 14.93 " 16.32 " 10.40 " 14
15 8.626" 9.113" 13.16 " 11.14 " 12.17 " 16.25 " 19.26 " 80.83 " 20.29 " 14.77 " 15.89 " 10.10 " 15
16 8.674" 9.165" 13.20 " 11.17 " 12.42 " 15.94 " 20.72 " 124.7 " 19.91 " 14.44 " 14.74 " 10.07 " 16
17 8.740" 8.983" 13.75 " 11.23 " 12.45 " 15.78 " 35.84 " 326.5 " 19.41 " 14.15 " 14.20 " 9.931" 17
18 8.669" 8.725" 13.82 " 11.24 " 12.53 " 18.62 " 33.52 " 321.8 " 19.02 " 13.68 " 13.84 " 9.530" 18
19 8.472" 8.765" 12.87 " 12.01 " 12.40 " 17.96 " 28.24 " 185.4 " 19.32 " 13.84 " 13.45 " 9.365" 19
20 8.431" 8.993" 12.46 " 12.04 " 12.40 " 17.31 " 52.87 " 119.3 " 19.03 " 13.87 " 13.23 " 9.352" 20
21 8.593" 9.401" 12.30 " 12.04 " 12.44 " 16.75 " 47.37 " 85.86 " 19.01 " 13.96 " 12.81 " 9.197" 21
22 8.653" 14.52 " 11.88 " 12.22 " 12.50 " 16.86 " 37.06 " 66.75 " 18.74 " 13.79 " 12.36 " 8.982" 22
23 8.699" 16.09 " 11.44 " 12.31 " 12.32 " 21.59 " 30.84 " 55.44 " 18.35 " 13.21 " 11.62 " 8.781" 23
24 8.704" 216.5 " 11.11 " 12.53 " 13.02 " 20.64 " 27.31 " 46.43 " 17.75 " 12.69 " 11.07 " 8.717" 24
25 8.643" 105.6 " 11.19 " 13.44 " 16.14 " 19.23 " 24.71 " 40.25 " 17.93 " 12.15 " 11.06 " 8.774" 25
26 8.644" 72.56 " 10.95 " 13.38 " 15.60 " 18.29 " 23.03 " 36.15 " 18.10 " 12.16 " 11.12 " 8.956" 26
27 8.616" 61.04 " 11.13 " 13.08 " 15.41 " 26.92 " 21.84 " 33.26 " 18.14 " 12.30 " 10.87 " 8.838" 27
28 8.620" 135.5 " 11.87 " 12.88 " 14.97 " 30.77 " 20.99 " 31.09 " 17.85 " 12.12 " 10.84 " 8.483" 28
29 8.727" 88.68 " 11.68 " 12.36 " 15.06 " 32.34 " 20.40 " 29.64 " 17.65 " 11.89 " 10.97 " 8.333" 29
30 8.912" 11.37 " 11.96 " 15.67 " 28.41 " 19.98 " 28.14 " 17.41 " 11.62 " 10.98 " 8.728" 30
31 8.877" 11.30 " 15.55 " 19.66 " 26.81 " 12.09 " 9.102" 31
Mean 8.793" 30.87 " 15.85 " 11.78 " 13.29 " 18.14 " 24.37 " 86.21 " 21.15 " 14.31 " 13.51 " 9.706"
Median 8.699" 8.932" 13.20 " 11.44 " 12.71 " 16.63 " 20.72 " 40.25 " 20.10 " 14.44 " 13.48 " 9.931"
Maximum 9.469" 216.5 " 49.50 " 13.44 " 16.14 " 32.34 " 52.87 " 336.9 " 26.74 " 17.21 " 16.99 " 10.76 "
Minimum 8.431" 8.167" 10.95 " 10.95 " 11.61 " 13.92 " 17.11 " 19.14 " 17.41 " 11.62 " 10.84 " 8.333"
Total 272.6 " 895.1 " 491.4 " 353.4 " 412.0 " 544.2 " 755.4 "2672 " 634.6 " 443.6 " 405.4 " 300.9 "
Summaries ------------------ Notes -------------------
--------- All recorded data is continuous and reliable
except where the following tags are used...
Annual Mean 22.35 " " ... Relative Uncertainty +/-10%
Ann. Median 13.83 "
Annual Total 8181 "
Maximum Minimum
Daily 336.9 " 8.167"
Department of Water and Environmental Regulation HYDAY V146 Output 14/05/2026
Site 701009 Irwin River - Mountain Bridge Year 2021
VarFrom 10.00 Stage - SL in Metres Table Type Total
VarTo 151.00 Stream Discharge Volume in Megalitres
Figures are for period ending 24:00
Day Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec Day
1 9.239" 8.340& 9.503" 14.79 " 19.38 " 299.2 " 32.15 " 686.7 " 29.44 " 23.38 " 21.90 " 12.40 " 1
2 9.133" 8.210& 9.813" 14.71 " 18.91 " 172.5 " 31.41 " 533.3 " 30.72 " 26.97 " 20.76 " 12.50 " 2
3 8.716" 7.977& 11.39 " 15.25 " 18.54 " 110.6 " 29.94 " 304.1 " 30.14 " 24.77 " 19.73 " 12.41 " 3
4 8.301" 7.513& 17.81 " 14.66 " 19.51 " 79.34 " 28.99 " 191.0 " 29.65 " 23.49 " 18.96 " 11.90 " 4
5 8.150" 7.570& 479.5 " 14.78 " 21.38 " 61.78 " 29.36 " 137.6 " 30.61 " 25.26 " 18.37 " 11.51 " 5
6 7.887" 7.893& 248.0 " 14.90 " 21.64 " 50.12 " 28.63 " 106.1 " 29.09 " 25.59 " 17.95 " 11.25 " 6
7 7.891" 8.587& 135.4 " 15.18 " 24.21 " 41.94 " 32.32 " 88.55 " 27.48 " 23.56 " 17.66 " 11.02 " 7
8 7.869" 14.13 & 112.8 " 15.06 " 22.28 " 36.77 " 32.64 " 92.62 " 26.40 " 22.11 " 17.47 " 10.77 " 8
9 8.118" 13.60 & 75.02 " 14.52 " 20.68 " 34.52 " 34.40 " 83.54 " 25.64 " 20.94 " 18.50 " 11.52 " 9
10 8.416" 12.81 & 52.67 " 14.32 " 19.33 " 34.64 " 52.08 " 97.74 " 25.01 " 20.09 " 17.91 " 11.72 " 10
11 8.512" 12.22 " 40.14 " 15.86 " 18.51 " 37.68 " 43.84 " 123.9 " 24.37 " 19.78 " 17.26 " 11.69 " 11
12 8.552" 11.67 " 32.69 "1174 " 18.22 " 33.90 " 68.05 " 171.6 " 23.51 " 19.34 " 16.55 " 11.79 " 12
13 8.524" 11.04 " 27.67 "2738 " 17.89 " 57.18 " 333.8 " 159.8 " 22.81 " 18.87 " 15.77 " 11.78 " 13
14 8.316" 11.19 " 24.11 " 602.1 " 17.53 " 61.41 " 407.3 " 114.2 " 22.30 " 18.39 " 15.76 " 11.67 " 14
15 7.952" 11.01 " 21.53 " 285.4 " 17.16 " 53.33 " 270.0 " 86.50 " 22.34 " 17.89 " 15.78 " 11.75 " 15
16 7.717" 10.78 " 19.40 " 161.3 " 16.76 " 45.28 " 188.1 " 69.81 " 29.21 " 18.10 " 15.70 " 12.08 " 16
17 7.637" 10.85 " 18.35 " 105.9 " 16.61 " 40.21 " 136.5 " 59.88 " 27.54 " 18.18 " 15.66 " 12.47 " 17
18 7.990" 10.73 " 17.66 " 74.14 " 17.33 " 35.17 " 104.6 " 53.25 " 25.12 " 17.89 " 15.61 " 12.43 " 18
19 8.405" 10.31 " 16.44 " 55.99 " 17.30 " 32.02 " 84.25 " 48.35 " 24.50 " 23.08 " 15.34 " 12.31 " 19
20 8.637" 10.09 " 16.33 " 44.39 " 16.93 " 30.68 " 99.68 " 45.42 " 23.93 " 26.29 " 14.78 " 12.02 " 20
21 8.725" 9.994" 16.12 " 36.87 " 16.73 " 54.55 " 470.4 " 42.64 " 22.71 " 24.33 " 14.65 " 11.89 " 21
22 8.666" 9.869" 16.10 " 32.04 " 16.61 " 72.95 " 567.1 " 40.79 " 21.52 " 22.29 " 14.73 " 11.89 " 22
23 8.832" 9.611" 16.18 " 29.00 " 19.43 " 176.7 " 366.3 " 39.35 " 20.76 " 21.30 " 14.39 " 11.66 " 23
24 8.987" 9.337" 15.54 " 26.61 " 20.79 " 99.77 " 238.5 " 37.26 " 20.32 " 22.08 " 13.87 " 10.84 " 24
25 9.026" 9.431" 15.34 " 24.64 " 21.08 " 69.12 " 160.0 " 34.95 " 20.02 " 22.26 " 13.25 " 10.07 " 25
26 9.149" 9.596" 15.20 " 23.08 " 19.61 " 51.94 " 126.1 " 33.60 " 20.42 " 23.53 " 12.65 " 9.601" 26
27 9.143" 9.564" 15.09 " 21.82 " 18.42 " 42.42 " 170.1 " 32.39 " 20.98 " 25.97 " 12.26 " 9.784" 27
28 9.026" 9.513" 14.88 " 20.88 " 19.64 " 38.92 " 307.2 " 31.33 " 20.96 " 26.05 " 12.12 " 9.285" 28
29 8.851" 14.77 " 20.31 " 25.97 " 35.85 " 366.9 " 30.28 " 20.51 " 23.10 " 12.35 " 9.148" 29
30 8.509" 15.08 " 20.04 "1905 " 33.37 " 229.9 " 29.56 " 20.11 " 21.57 " 12.40 " 9.410" 30
31 8.296& 15.10 " 682.0 " 206.1 " 29.32 " 22.70 " 9.799" 31
Mean 8.489& 10.12 & 50.18 " 188.7 " 101.5 " 67.47 " 170.2 " 117.3 " 24.60 " 22.23 " 16.00 " 11.30 "
Median 8.512& 9.931& 16.44 " 22.45 " 19.33 " 47.70 " 126.1 " 69.81 " 24.15 " 22.29 " 15.73 " 11.69 "
Maximum 9.239& 14.13 & 479.5 "2738 "1905 " 299.2 " 567.1 " 686.7 " 30.72 " 26.97 " 21.90 " 12.50 "
Minimum 7.637& 7.513& 9.503" 14.32 " 16.61 " 30.68 " 28.63 " 29.32 " 20.02 " 17.89 " 12.12 " 9.148"
Total 263.2 & 283.5 &1556 "5661 "3145 "2024 "5276 "3635 " 738.1 " 689.1 " 480.1 " 350.4 "
Summaries ------------------ Notes -------------------
--------- All recorded data is continuous and reliable
except where the following tags are used...
Annual Mean 66.03 & " ... Relative Uncertainty +/-10%
Ann. Median 20.31 & & ... Relative Uncertainty +/-30%
Annual Total 24102 &
Maximum Minimum
Daily 2738 & 7.513&
Department of Water and Environmental Regulation HYDAY V146 Output 14/05/2026
Site 701009 Irwin River - Mountain Bridge Year 2022
VarFrom 10.00 Stage - SL in Metres Table Type Total
VarTo 151.00 Stream Discharge Volume in Megalitres
Figures are for period ending 24:00
Day Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec Day
1 9.75" 8.74" 9.68" 338.4 " 17.60" 16.72" 19.29" 45.17" 65.17" 31.04" 18.39" 13.14" 1
2 9.66" 8.37" 9.85" 180.6 " 17.18" 16.70" 19.01" 66.84" 59.82" 29.63" 17.99" 13.01" 2
3 9.74" 8.14" 9.79" 135.6 " 16.94" 16.73" 18.76" 91.45" 63.85" 28.28" 17.20" 12.97" 3
4 9.82" 8.22" 9.52" 98.89" 16.50" 16.70" 18.47" 193.9 " 62.49" 26.95" 17.07" 13.13" 4
5 9.62" 8.25" 9.35" 175.3 " 16.02" 16.40" 18.31" 217.7 " 107.1 " 26.88" 16.89" 13.10" 5
6 9.58" 8.73" 9.25" 111.5 " 15.67" 16.18" 18.57" 175.6 " 163.7 " 26.23" 16.81" 12.90" 6
7 9.70" 9.02" 9.23" 82.69" 15.51" 15.84" 18.47" 133.4 " 236.6 " 25.13" 16.99" 12.25" 7
8 9.87" 9.09" 9.10" 57.15" 15.50" 15.76" 18.01" 101.1 " 225.9 " 24.29" 17.79" 12.37" 8
9 9.78" 9.02" 9.06" 44.68" 15.46" 16.87" 17.77" 93.03" 178.8 " 23.81" 17.66" 12.49" 9
10 9.55" 9.01" 9.07" 37.22" 15.84" 18.38" 22.16" 89.41" 137.6 " 23.83" 17.41" 12.28" 10
11 9.30" 8.94" 9.17" 34.16" 16.51" 19.22" 22.97" 93.24" 108.4 " 23.55" 17.31" 11.88" 11
12 9.52" 9.04" 9.46" 32.79" 18.38" 21.05" 21.67" 95.63" 88.52" 22.99" 16.61" 11.37" 12
13 9.70" 9.04" 9.65" 28.74" 20.87" 21.98" 20.60" 76.55" 80.26" 22.36" 16.01" 10.58" 13
14 9.83" 9.02" 9.83" 26.03" 19.94" 20.65" 20.64" 72.01" 73.86" 21.96" 15.35" 10.31" 14
15 9.90" 8.98" 10.08" 24.11" 19.30" 19.64" 21.37" 73.58" 76.89" 21.67" 14.67" 10.63" 15
16 9.87" 8.75" 10.21" 23.11" 18.66" 19.42" 21.61" 2134 " 77.41" 21.35" 14.62" 10.47" 16
17 9.65" 8.56" 10.24" 22.20" 18.04" 21.11" 21.56"10078 " 68.51" 21.40" 15.61" 10.28" 17
18 9.33" 8.34" 10.29" 20.89" 17.97" 25.74" 24.07" 3312 " 61.89" 21.20" 17.27" 10.17" 18
19 9.01" 8.28" 10.31" 19.83" 17.91" 26.47" 24.33" 1443 " 58.17" 20.72" 17.18" 10.06" 19
20 8.74" 8.33" 10.36" 19.09" 17.86" 42.02" 22.82" 622.0 " 55.52" 20.67" 16.80" 10.63" 20
21 8.59" 8.30" 10.63" 18.45" 17.68" 44.19" 36.88" 375.2 " 52.43" 20.63" 15.62" 10.60" 21
22 8.44" 8.40" 10.47" 17.88" 17.76" 31.96" 47.79" 264.0 " 51.72" 20.36" 14.47" 10.32" 22
23 8.32" 8.58" 10.21" 17.37" 19.11" 27.31" 66.04" 200.4 " 51.87" 20.55" 14.62" 9.88" 23
24 8.50" 8.73" 9.87" 17.02" 20.28" 25.16" 123.4 " 159.8 " 50.49" 21.28" 14.48" 9.77" 24
25 8.63" 9.03" 9.81" 16.79" 19.71" 23.84" 96.30" 132.2 " 46.73" 20.48" 14.32" 10.09" 25
26 8.80" 9.28" 11.79" 17.57" 18.99" 22.47" 130.4 " 112.5 " 42.56" 19.85" 14.21" 10.39" 26
27 8.85" 9.39" 13.84" 20.93" 18.29" 21.37" 86.36" 99.07" 39.67" 19.48" 13.89" 10.39" 27
28 8.69" 9.50" 56.19" 25.81" 17.89" 20.72" 65.40" 89.31" 38.03" 19.27" 13.27" 10.12" 28
29 8.72" 405.7 " 20.30" 17.40" 20.22" 53.79" 82.10" 35.51" 19.56" 12.59" 9.81" 29
30 8.77" 758.4 " 18.40" 16.99" 19.72" 54.45" 76.81" 32.90" 19.80" 12.90" 10.00" 30
31 8.90" 573.0 " 16.79" 45.48" 71.45" 18.99" 10.29" 31
Mean 9.262" 8.753" 66.56 " 56.78 " 17.70 " 22.02 " 39.25 " 673.2 " 83.08 " 22.72 " 15.87 " 11.15 "
Median 9.516" 8.746" 9.869" 24.96 " 17.76 " 20.44 " 22.16 " 101.1 " 63.17 " 21.40 " 16.31 " 10.58 "
Maximum 9.90" 9.50" 758.4 " 338.4 " 20.87" 44.19" 130.4 "10078 " 236.6 " 31.04" 18.39" 13.14"
Minimum 8.322" 8.138" 9.062" 16.79 " 15.46 " 15.76 " 17.77 " 45.17 " 32.90 " 18.99 " 12.59 " 9.770"
Total 287.1 " 245.1 " 2063 " 1704 " 548.6 " 660.5 " 1217 "20870 " 2492 " 704.2 " 476.0 " 345.7 "
Summaries ------------------ Notes -------------------
--------- All recorded data is continuous and reliable
except where the following tags are used...
Annual Mean 86.61 " " ... Relative Uncertainty +/-10%
Ann. Median 18.04 "
Annual Total 31613 "
Maximum Minimum
Daily 10078 " 8.138"
Department of Water and Environmental Regulation HYDAY V146 Output 14/05/2026
Site 701009 Irwin River - Mountain Bridge Year 2023
VarFrom 10.00 Stage - SL in Metres Table Type Total
VarTo 151.00 Stream Discharge Volume in Megalitres
Figures are for period ending 24:00
Day Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec Day
1 10.35 " 10.09 " 10.57 " 588.3 " 17.00 " 26.40 " 21.49 " 23.30 " 19.43 " 17.33 " 12.17 " 11.82 " 1
2 10.08 " 9.470" 11.19 " 690.6 " 16.67 " 24.41 " 21.20 " 23.83 " 20.16 " 17.41 " 11.77 " 11.60 " 2
3 9.469" 9.021" 11.02 " 256.7 " 16.40 " 21.99 " 22.00 " 27.64 " 21.79 " 17.01 " 11.32 " 11.65 " 3
4 9.094" 8.859" 10.85 " 144.1 " 16.34 " 20.95 " 26.95 " 26.47 " 21.81 " 16.60 " 11.50 " 11.60 " 4
5 9.031" 9.311" 10.68 " 94.58 " 16.31 " 23.58 " 29.30 " 24.83 " 21.51 " 16.07 " 11.96 " 11.35 " 5
6 8.955" 9.710" 10.64 " 64.61 " 17.79 " 27.39 " 27.84 " 24.78 " 21.54 " 15.42 " 12.29 " 11.21 " 6
7 9.162" 9.931" 10.50 " 47.39 " 19.21 " 27.23 " 25.71 " 29.05 " 20.74 " 15.32 " 12.34 " 11.24 " 7
8 9.353" 10.08 " 10.37 " 37.38 " 18.89 " 24.69 " 24.66 " 27.92 " 19.68 " 15.04 " 12.43 " 11.10 " 8
9 9.410" 10.03 " 10.69 " 31.84 " 17.91 " 23.43 " 24.33 " 26.20 " 19.58 " 14.94 " 12.57 " 10.56 " 9
10 9.724" 10.14 " 11.12 " 28.62 " 18.26 " 22.73 " 23.81 " 24.92 " 19.54 " 14.91 " 12.39 " 9.955" 10
11 10.03 " 10.24 " 11.46 " 26.36 " 18.04 " 23.58 " 23.28 " 24.67 " 19.32 " 14.58 " 11.99 " 9.780" 11
12 10.23 " 10.20 " 11.49 " 24.58 " 17.31 " 22.82 " 22.96 " 24.29 " 19.24 " 14.11 " 11.77 " 9.810" 12
13 10.43 " 10.15 " 11.59 " 23.40 " 17.49 " 21.88 " 23.00 " 23.88 " 20.07 " 13.39 " 11.79 " 9.817" 13
14 10.17 " 10.36 " 11.71 " 22.50 " 17.48 " 21.48 " 23.52 " 23.24 " 21.69 " 13.00 " 12.09 " 9.953" 14
15 9.619" 10.67 " 11.66 " 21.49 " 17.27 " 21.57 " 23.18 " 22.92 " 20.90 " 12.61 " 12.43 " 9.896" 15
16 9.655" 10.90 " 11.68 " 20.79 " 17.02 " 22.15 " 22.52 " 25.70 " 20.41 " 12.27 " 11.97 " 9.734" 16
17 9.780" 10.87 " 11.73 " 20.29 " 16.68 " 22.28 " 22.17 " 25.19 " 20.11 " 12.53 " 11.20 " 10.27 " 17
18 9.604" 10.81 " 11.71 " 19.71 " 16.19 " 21.85 " 22.04 " 23.72 " 19.87 " 13.07 " 10.73 " 10.36 " 18
19 9.437" 10.79 " 11.59 " 18.99 " 15.81 " 21.27 " 23.51 " 22.78 " 19.79 " 13.32 " 10.55 " 9.677" 19
20 9.479" 10.87 " 11.63 " 18.53 " 15.78 " 23.62 " 23.86 " 22.59 " 19.50 " 13.34 " 10.50 " 9.124" 20
21 9.828" 11.03 " 11.85 " 18.16 " 15.67 " 23.82 " 23.04 " 22.62 " 19.26 " 13.48 " 10.33 " 9.482" 21
22 10.25 " 11.19 " 12.48 " 17.76 " 15.69 " 23.23 " 22.32 " 22.16 " 19.41 " 13.75 " 10.23 " 9.962" 22
23 10.35 " 10.97 " 12.89 " 17.47 " 15.78 " 23.18 " 21.84 " 21.73 " 19.57 " 13.83 " 10.61 " 10.19 " 23
24 10.62 " 10.61 " 13.19 " 18.36 " 17.25 " 23.23 " 21.33 " 21.35 " 19.30 " 13.38 " 10.90 " 9.914" 24
25 10.50 " 10.17 " 13.35 " 19.46 " 17.28 " 24.35 " 21.39 " 21.06 " 18.80 " 12.69 " 11.16 " 9.797" 25
26 10.10 " 9.947" 13.43 " 19.29 " 16.72 " 24.26 " 24.01 " 20.74 " 18.26 " 13.04 " 11.44 " 10.26 " 26
27 10.04 " 9.819" 13.29 " 18.78 " 16.57 " 23.36 " 25.57 " 20.55 " 17.50 " 13.02 " 11.74 " 10.42 " 27
28 10.09 " 9.927" 12.82 " 18.11 " 16.49 " 22.48 " 24.73 " 20.41 " 17.27 " 12.80 " 11.99 " 10.55 " 28
29 10.22 " 12.65 " 17.55 " 16.32 " 22.05 " 23.87 " 20.19 " 17.33 " 12.88 " 12.42 " 10.32 " 29
30 11.04 " 13.97 " 17.20 " 16.53 " 21.79 " 24.27 " 19.81 " 17.29 " 13.12 " 12.26 " 10.25 # 30
31 10.51 " 29.75 " 20.64 " 23.85 " 19.26 " 12.67 " 9.957# 31
Mean 9.890" 10.22 " 12.37 " 79.43 " 17.06 " 23.24 " 23.66 " 23.48 " 19.69 " 14.09 " 11.63 " 10.37 #
Median 10.03 " 10.16 " 11.66 " 21.14 " 16.72 " 23.21 " 23.51 " 23.30 " 19.57 " 13.39 " 11.78 " 10.25 #
Maximum 11.04 " 11.19 " 29.75 " 690.6 " 20.64 " 27.39 " 29.30 " 29.05 " 21.81 " 17.41 " 12.57 " 11.82 #
Minimum 8.955" 8.859" 10.37 " 17.20 " 15.67 " 20.95 " 21.20 " 19.26 " 17.27 " 12.27 " 10.23 " 9.124#
Total 306.6 " 286.1 " 383.5 "2383 " 528.8 " 697.1 " 733.6 " 727.8 " 590.7 " 436.9 " 348.8 " 321.6 #
Summaries ------------------ Notes -------------------
--------- All recorded data is continuous and reliable
except where the following tags are used...
Annual Mean 21.22 # " ... Relative Uncertainty +/-10%
Ann. Median 16.19 # # ... Relative Uncertainty +/-15%
Annual Total 7745 #
Maximum Minimum
Daily 690.6 # 8.859#
Department of Water and Environmental Regulation HYDAY V146 Output 14/05/2026
Site 701009 Irwin River - Mountain Bridge Year 2024
VarFrom 10.00 Stage - SL in Metres Table Type Total
VarTo 151.00 Stream Discharge Volume in Megalitres
Figures are for period ending 24:00
Day Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec Day
1 9.55# 9.90" 12.38" 11.66" 12.80" 16.24" 590.7 " 676.8 " 96.75" 23.41" 17.42" 15.04" 1
2 9.36# 9.55" 12.16" 11.35" 13.18" 19.50" 442.7 " 1453 " 88.99" 26.62" 17.60" 14.86" 2
3 9.38# 9.55" 12.71" 11.10" 13.29" 20.61" 284.9 " 672.8 " 81.09" 32.56" 17.51" 14.95" 3
4 9.33" 9.51" 12.34" 10.96" 13.41" 19.58" 191.9 " 354.1 " 74.47" 29.19" 17.38" 14.96" 4
5 9.19" 9.50" 12.12" 10.91" 13.41" 18.56" 138.3 " 239.6 " 71.42" 27.86" 17.20" 14.74" 5
6 9.17" 9.39" 11.63" 11.51" 13.59" 24.54" 107.0 " 184.8 " 71.73" 27.26" 17.16" 14.39" 6
7 9.28" 9.28" 11.12" 12.12" 13.64" 30.96" 98.06" 155.6 " 68.94" 27.19" 17.02" 14.03" 7
8 9.23" 9.25" 11.13" 11.89" 13.39" 35.03" 88.35" 137.0 " 70.70" 27.03" 17.44" 13.73" 8
9 9.50" 9.27" 11.18" 11.28" 13.06" 2353 $ 181.4 " 125.7 " 69.99" 25.80" 17.34" 13.44" 9
10 9.69" 9.26" 11.02" 11.14" 13.21"14516 $ 885.8 " 123.1 " 62.56" 24.29" 16.75" 12.95" 10
11 9.82" 9.28" 10.90" 11.12" 13.49" 2422 " 6059 " 121.8 " 55.64" 23.05" 16.56" 15.57" 11
12 10.03" 9.57" 10.92" 11.53" 13.59" 746.9 " 1195 " 118.2 " 49.29" 22.62" 16.34" 17.02" 12
13 10.25" 9.61" 11.06" 12.11" 13.93" 550.3 " 660.0 " 135.0 " 44.21" 22.21" 16.03" 15.02" 13
14 10.54" 9.37" 11.00" 12.19" 14.46" 481.6 " 460.2 " 186.8 " 40.13" 21.77" 15.90" 14.67" 14
15 10.65" 9.36" 10.95" 12.05" 14.16" 328.6 " 315.1 " 142.3 " 36.38" 21.52" 16.15" 14.12" 15
16 10.74" 9.97" 10.84" 11.89" 13.51" 226.8 " 232.3 " 118.0 " 33.38" 23.27" 15.79" 13.61" 16
17 10.82" 10.22" 11.12" 11.65" 12.95" 170.6 " 177.1 " 127.6 " 31.24" 29.62" 14.96" 13.02" 17
18 10.69" 9.91" 11.70" 11.51" 12.70" 139.4 " 179.8 " 476.6 " 29.75" 26.33" 14.43" 12.76" 18
19 10.62" 9.64" 11.26" 11.44" 12.56" 115.8 " 323.2 " 1040 " 28.69" 24.63" 17.18" 12.68" 19
20 10.72" 9.58" 10.87" 11.42" 12.49" 96.85" 522.5 " 479.9 " 27.85" 24.43" 19.70" 12.12" 20
21 10.91" 9.78" 10.81" 11.42" 12.57" 82.84" 326.6 " 291.8 " 27.03" 24.12" 19.37" 11.93" 21
22 10.79" 9.98" 10.70" 11.70" 12.72" 72.95" 214.2 " 208.9 " 26.21" 22.92" 18.33" 11.56" 22
23 10.59" 9.73" 10.46" 11.83" 12.90" 67.27" 196.9 " 171.6 " 25.91" 21.80" 16.98" 11.05" 23
24 10.53" 10.85" 10.54" 11.74" 13.19" 59.22" 659.1 " 169.2 " 25.62" 20.87" 16.00" 11.28" 24
25 10.41" 14.09" 10.62" 11.92" 14.09" 53.55" 1081 " 235.8 " 25.18" 20.41" 15.65" 11.35" 25
26 10.18" 13.49" 10.73" 12.44" 14.60" 52.08" 525.4 " 344.1 " 24.67" 20.01" 14.74" 11.17" 26
27 10.13" 13.42" 10.82" 12.55" 14.49" 53.82" 340.8 " 242.9 " 25.24" 19.44" 14.37" 11.06" 27
28 10.38" 12.62" 11.02" 12.54" 14.99" 62.02" 272.3 " 174.9 " 25.69" 18.69" 20.35" 10.82" 28
29 10.22" 12.33" 11.29" 12.41" 16.46" 484.9 " 235.3 " 140.6 " 24.87" 18.07" 17.78" 10.59" 29
30 10.19" 11.52" 12.32" 17.35" 676.4 " 494.1 " 121.7 " 23.99" 17.92" 15.72" 10.86" 30
31 10.15" 11.71" 17.57" 1012 " 106.3 " 17.68" 11.14" 31
Mean 10.10 # 10.25 " 11.25 " 11.72 " 13.80 " 799.9 $ 596.5 " 299.2 " 46.25 " 23.63 " 16.84 " 13.11 "
Median 10.19 # 9.612" 11.06 " 11.68 " 13.41 " 77.89 $ 323.2 " 174.9 " 34.88 " 23.27 " 17.00 " 13.02 "
Maximum 10.91# 14.09" 12.71" 12.55" 17.57"14516 $ 6059 " 1453 " 96.75" 32.56" 20.35" 17.02"
Minimum 9.170# 9.252" 10.46 " 10.91 " 12.49 " 16.24 $ 88.35 " 106.3 " 23.99 " 17.68 " 14.37 " 10.59 "
Total 313.0 # 297.3 " 348.6 " 351.7 " 427.7 "23997 $18492 " 9277 " 1388 " 732.6 " 505.1 " 406.5 "
Summaries ------------------ Notes -------------------
--------- All recorded data is continuous and reliable
except where the following tags are used...
Annual Mean 154.5 $ " ... Relative Uncertainty +/-10%
Ann. Median 15.61 $ # ... Relative Uncertainty +/-15%
Annual Total 56536 $ $ ... Relative Uncertainty +/-20%
Maximum Minimum
Daily 14516 $ 9.170$
Department of Water and Environmental Regulation HYDAY V146 Output 14/05/2026
Site 701009 Irwin River - Mountain Bridge Year 2025
VarFrom 10.00 Stage - SL in Metres Table Type Total
VarTo 151.00 Stream Discharge Volume in Megalitres
Figures are for period ending 24:00
Day Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec Day
1 12.89 " 10.17 " 10.26 " 10.44 " 12.83 " 20.58 " 29.53 " 187.3 " 213.9 " 37.00 " 23.59 " 18.69 " 1
2 13.02 " 10.21 " 10.41 " 10.46 " 13.11 " 20.93 " 28.87 " 139.0 " 174.5 " 35.61 " 23.08 " 18.30 " 2
3 12.33 " 10.24 " 10.81 " 10.31 " 14.51 " 32.77 " 36.56 " 133.9 " 148.7 " 34.63 " 22.11 " 18.06 " 3
4 11.86 " 10.10 " 11.03 " 10.76 " 15.64 " 47.38 " 36.01 " 148.9 " 129.3 " 33.79 " 21.59 " 17.92 " 4
5 11.57 " 10.12 " 10.67 " 11.15 " 15.27 " 44.99 " 32.97 " 173.5 " 121.4 " 35.96 " 23.05 " 17.82 " 5
6 11.19 " 10.31 " 10.67 " 11.53 " 14.92 " 32.49 " 52.26 " 162.3 " 218.7 " 36.25 " 24.93 " 17.71 " 6
7 11.12 " 10.50 " 10.89 " 11.67 " 14.48 " 26.87 " 64.19 " 132.1 " 852.6 " 33.76 " 31.21 " 17.50 " 7
8 11.25 " 10.60 " 11.19 " 12.10 " 14.02 " 24.15 " 55.85 " 107.8 " 761.9 " 33.90 " 79.33 " 17.41 " 8
9 11.35 " 10.62 " 11.37 " 12.38 " 13.77 " 22.51 " 45.52 " 92.37 " 472.4 " 35.63 " 45.07 " 17.37 " 9
10 11.65 " 10.63 " 11.08 " 12.32 " 13.81 " 21.57 " 49.49 " 81.43 " 317.7 " 34.08 " 31.34 " 17.35 " 10
11 12.18 " 10.68 " 10.98 " 12.01 " 14.04 " 21.11 " 48.99 " 74.28 " 222.2 " 32.90 " 26.41 " 17.36 " 11
12 11.97 " 10.62 " 11.46 " 12.24 " 14.08 " 20.77 " 43.61 " 70.23 " 170.1 " 31.92 " 24.18 " 17.24 " 12
13 11.93 " 10.32 " 12.08 " 12.95 " 14.12 " 20.57 " 42.98 " 71.26 " 139.6 " 30.88 " 22.96 " 16.54 " 13
14 11.87 " 10.09 " 12.07 " 13.71 " 13.83 " 20.61 " 42.99 " 72.97 " 121.1 " 30.17 " 22.00 " 16.15 " 14
15 11.49 " 9.733" 12.03 " 13.44 " 13.55 " 20.71 " 42.40 " 69.16 " 109.8 " 29.41 " 21.28 " 17.05 " 15
16 11.09 " 9.724" 11.74 " 13.12 " 13.58 " 20.88 " 41.39 " 61.05 " 104.0 " 28.67 " 20.44 " 17.14 " 16
17 11.41 " 9.825" 11.29 " 13.04 " 13.63 " 20.59 " 42.61 " 57.72 " 102.9 " 27.95 " 19.70 " 17.16 " 17
18 11.44 " 9.839" 11.06 " 13.07 " 13.54 " 25.91 " 40.00 " 52.85 " 99.07 " 27.69 " 20.22 " 16.56 " 18
19 10.99 " 9.881" 11.24 " 13.08 " 13.53 " 29.38 " 37.37 " 49.16 " 90.57 " 27.47 " 20.92 " 16.06 " 19
20 10.64 " 10.29 " 11.36 " 12.93 " 13.84 " 28.37 " 35.79 " 69.23 " 82.74 " 27.88 " 20.78 " 15.68 " 20
21 10.28 " 10.53 " 11.19 " 12.77 " 14.00 " 48.15 " 36.85 " 675.2 " 76.14 " 27.69 " 20.42 " 15.10 " 21
22 10.38 " 10.43 " 11.14 " 12.80 " 14.09 " 56.43 " 34.97 " 727.5 " 69.43 " 26.93 " 20.30 " 14.83 " 22
23 10.54 " 10.20 " 11.30 " 13.43 " 15.39 " 112.8 " 35.39 " 429.9 " 63.11 " 26.39 " 20.37 " 14.28 " 23
24 10.59 " 10.21 " 11.37 " 13.62 " 16.79 " 103.2 " 66.56 " 512.5 " 57.29 " 26.25 " 26.86 " 13.62 " 24
25 10.99 " 10.38 " 11.12 " 13.35 " 16.52 " 71.82 " 76.27 "1343 " 52.56 " 26.09 " 36.07 " 13.38 " 25
26 11.29 " 10.34 " 10.79 " 13.35 " 16.62 " 57.19 " 131.2 "4366 " 48.63 " 25.59 " 29.70 " 14.05 " 26
27 10.90 " 10.28 " 10.52 " 13.46 " 16.38 " 46.14 " 122.7 "3480 " 45.45 " 24.77 " 26.09 " 14.52 " 27
28 10.21 " 10.09 " 10.45 " 13.23 " 15.62 " 38.62 " 215.4 " 980.6 " 42.73 " 23.96 " 23.60 " 14.20 " 28
29 10.05 " 10.42 " 13.07 " 17.04 " 33.97 " 492.4 " 517.6 " 40.67 " 24.31 " 21.95 " 13.90 " 29
30 9.981" 10.41 " 12.96 " 21.22 " 30.98 " 414.3 " 362.4 " 38.75 " 24.17 " 20.11 " 13.23 " 30
31 10.11 " 10.29 " 21.90 " 267.5 " 277.1 " 23.88 " 12.77 " 31
Mean 11.24 " 10.25 " 11.05 " 12.49 " 15.02 " 37.41 " 88.49 " 505.7 " 172.9 " 29.86 " 26.32 " 16.10 "
Median 11.25 " 10.26 " 11.08 " 12.94 " 14.09 " 28.87 " 42.99 " 139.0 " 106.9 " 28.67 " 23.01 " 16.56 "
Maximum 13.02 " 10.68 " 12.08 " 13.71 " 21.90 " 112.8 " 492.4 "4366 " 852.6 " 37.00 " 79.33 " 18.69 "
Minimum 9.981" 9.724" 10.26 " 10.31 " 12.83 " 20.57 " 28.87 " 49.16 " 38.75 " 23.88 " 19.70 " 12.77 "
Total 348.6 " 287.0 " 342.7 " 374.7 " 465.7 " 1122 " 2743 "15678 " 5188 " 925.6 " 789.7 " 499.0 "
Summaries ------------------ Notes -------------------
--------- All recorded data is continuous and reliable
except where the following tags are used...
Annual Mean 78.80 " " ... Relative Uncertainty +/-10%
Ann. Median 20.22 "
Annual Total 28764 "
Maximum Minimum
Daily 4366 " 9.724"
Department of Water and Environmental Regulation HYDAY V146 Output 14/05/2026
Site 701009 Irwin River - Mountain Bridge Year 2026
VarFrom 10.00 Stage - SL in Metres Table Type Total
VarTo 151.00 Stream Discharge Volume in Megalitres
Figures are for period ending 24:00
Day Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec Day
1 12.63 " 12.34 " 15.28 " 17.65 " 20.24 " [ ] [ ] [ ] [ ] [ ] [ ] [ ] 1
2 13.19 " 11.76 " 15.01 " 17.26 " 19.57 " [ ] [ ] [ ] [ ] [ ] [ ] [ ] 2
3 13.78 " 12.08 " 14.84 " 17.15 " 19.09 " [ ] [ ] [ ] [ ] [ ] [ ] [ ] 3
4 14.25 " 12.14 " 14.62 " 17.48 " 18.69 " [ ] [ ] [ ] [ ] [ ] [ ] [ ] 4
5 14.36 " 11.90 " 14.15 " 17.87 " 18.44 " [ ] [ ] [ ] [ ] [ ] [ ] [ ] 5
6 14.69 " 11.74 " 13.89 " 17.80 " 18.21 " [ ] [ ] [ ] [ ] [ ] [ ] [ ] 6
7 14.73 " 11.60 " 14.02 " 17.82 " 18.05 " [ ] [ ] [ ] [ ] [ ] [ ] [ ] 7
8 14.28 " 11.61 " 14.05 " 17.77 " 17.94 " [ ] [ ] [ ] [ ] [ ] [ ] [ ] 8
9 13.67 " 12.18 " 14.37 " 17.55 " 17.76 " [ ] [ ] [ ] [ ] [ ] [ ] [ ] 9
10 13.28 " 17.82 " 14.34 " 17.35 " 17.58 " [ ] [ ] [ ] [ ] [ ] [ ] [ ] 10
11 12.60 " 17.74 " 14.08 " 17.01 " 17.54 " [ ] [ ] [ ] [ ] [ ] [ ] [ ] 11
12 12.83 " 16.44 " 14.02 " 17.01 " 17.66 " [ ] [ ] [ ] [ ] [ ] [ ] [ ] 12
13 13.23 " 31.60 " 14.11 " 16.97 " [ ] [ ] [ ] [ ] [ ] [ ] [ ] [ ] 13
14 13.14 " 37.80 " 14.20 " 16.82 " [ ] [ ] [ ] [ ] [ ] [ ] [ ] [ ] 14
15 13.01 " 57.84 " 14.12 " 16.83 " [ ] [ ] [ ] [ ] [ ] [ ] [ ] [ ] 15
16 13.31 " 48.26 " 14.12 " 16.86 " [ ] [ ] [ ] [ ] [ ] [ ] [ ] [ ] 16
17 13.51 " 33.34 " 13.95 " 17.28 " [ ] [ ] [ ] [ ] [ ] [ ] [ ] [ ] 17
18 13.69 " 26.46 " 13.78 " 18.34 " [ ] [ ] [ ] [ ] [ ] [ ] [ ] [ ] 18
19 13.66 " 23.47 " 14.19 " 18.35 " [ ] [ ] [ ] [ ] [ ] [ ] [ ] [ ] 19
20 13.05 " 21.24 " 14.49 " 18.16 " [ ] [ ] [ ] [ ] [ ] [ ] [ ] [ ] 20
21 12.01 " 19.46 " 14.81 " 18.20 " [ ] [ ] [ ] [ ] [ ] [ ] [ ] [ ] 21
22 12.05 " 18.15 " 15.07 " 18.02 " [ ] [ ] [ ] [ ] [ ] [ ] [ ] [ ] 22
23 12.49 " 17.17 " 15.23 " 18.15 " [ ] [ ] [ ] [ ] [ ] [ ] [ ] [ ] 23
24 12.89 " 16.50 " 14.98 " 18.88 " [ ] [ ] [ ] [ ] [ ] [ ] [ ] [ ] 24
25 13.68 " 16.35 " 14.97 " 18.70 " [ ] [ ] [ ] [ ] [ ] [ ] [ ] [ ] 25
26 14.72 " 16.20 " 14.97 " 18.23 " [ ] [ ] [ ] [ ] [ ] [ ] [ ] [ ] 26
27 14.48 " 16.09 " 16.00 " 19.72 " [ ] [ ] [ ] [ ] [ ] [ ] [ ] [ ] 27
28 13.96 " 15.78 " 18.33 " 21.00 " [ ] [ ] [ ] [ ] [ ] [ ] [ ] [ ] 28
29 13.55 " 18.78 " 21.54 " [ ] [ ] [ ] [ ] [ ] [ ] [ ] [ ] 29
30 13.43 " 18.43 " 20.86 " [ ] [ ] [ ] [ ] [ ] [ ] [ ] [ ] 30
31 13.13 " 18.07 " [ ] [ ] [ ] [ ] [ ] 31
Mean 13.46 " 20.54 " 15.01 " 18.09 " 18.40 " [ ] [ ] [ ] [ ] [ ] [ ] [ ]
Median 13.43 " 16.47 " 14.49 " 17.81 " 18.13 " [ ] [ ] [ ] [ ] [ ] [ ] [ ]
Maximum 14.73 " 57.84 " 18.78 " 21.54 " 20.24 " [ ] [ ] [ ] [ ] [ ] [ ] [ ]
Minimum 12.01 " 11.60 " 13.78 " 16.82 " 17.54 " [ ] [ ] [ ] [ ] [ ] [ ] [ ]
Total 417.3 " 575.1 " 465.3 " 542.6 " 220.7 " [ ] [ ] [ ] [ ] [ ] [ ] [ ]
Missing Days 0 0 0 0 19 30 31 31 30 31 30 31
Summaries ------------------ Notes -------------------
--------- All recorded data is continuous and reliable
except where the following tags are used...
Annual Mean 16.83 " " ... Relative Uncertainty +/-10%
Ann. Median 15.53 " [ ... Not Available
Annual Total 2221 "
Missing Days 233
Maximum Minimum
Daily 57.84 " 11.60 "