Discharge Tables
1-inch Montana Flume
Minimum Head (ft) | 0.05 | Minimum Head (m) | 0.0152 |
Minimum Flow Rate (cfs) | 0.0033 | Minimum Flow Rate (l/s) | 0.0921 |
Maximum Head (ft) | 0.70 | Maximum Head (m) | 0.2134 |
Maximum Flow Rate (cfs) | 0.1945 | Maximum Flow Rate (l/s) | 5.507 |
Equation=cfs, ft | 0.338*H1.55 | ||
Equation=l/s, m | 60.36*H1.55 | ||
Download The Full Table | Not suitable for use on unscreened sanitary flows |
2-inch Montana Flume
Minimum Head (ft) | 0.05 | Minimum Head (m) | 0.0152 |
Minimum Flow Rate (cfs) | 0.0065 | Minimum Flow Rate (l/s) | 0.1843 |
Maximum Head (ft) | 0.80 | Maximum Head (m) | 0.2438 |
Maximum Flow Rate (cfs) | 0.4783 | Maximum Flow Rate (l/s) | 13.55 |
Equation=cfs, ft | 0.676*H1.55 | ||
Equation=l/s, m | 120.7*H1.55 | ||
Download The Full Table | Not suitable for use on unscreened sanitary flows |
3-inch Montana Flume
Minimum Head (ft) | 0.10 | Minimum Head (m) | 0.0305 |
Minimum Flow Rate (cfs) | 0.0280 | Minimum Flow Rate (l/s) | 0.7918 |
Maximum Head (ft) | 1.50 | Maximum Head (m) | 0.4572 |
Maximum Flow Rate (cfs) | 1.860 | Maximum Flow Rate (l/s) | 52.67 |
Equation=cfs, ft | 0.992*H1.55 | ||
Equation=l/s, m | 176.5*H1.55 | ||
Download The Full Table | Minimum size recommended for sanitary flows |
6-inch Montana Flume
Minimum Head (ft) | 0.10 | Minimum Head (m) | 0.0305 |
Minimum Flow Rate (cfs) | 0.0542 | Minimum Flow Rate (l/s) | 1.534 |
Maximum Head (ft) | 1.50 | Maximum Head (m) | 0.4572 |
Maximum Flow Rate (cfs) | 3.909 | Maximum Flow Rate (l/s) | 110.7 |
Equation=cfs, ft | 2.06*H1.58 | ||
Equation=l/s, m | 381.2*H1.58 | ||
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9-inch Montana Flume
Minimum Head (ft) | 0.10 | Minimum Head (m) | 0.0305 |
Minimum Flow Rate (cfs) | 0.0906 | Minimum Flow Rate (l/s) | 2.566 |
Maximum Head (ft) | 2.00 | Maximum Head (m) | 0.6096 |
Maximum Flow Rate (cfs) | 8.866 | Maximum Flow Rate (l/s) | 251.1 |
Equation=cfs, ft | 3.07*H1.53 | ||
Equation=l/s, m | 535.4*H1.53 | ||
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12-inch Montana Flume
Minimum Head (ft) | 0.10 | Minimum Head (m) | 0.0305 |
Minimum Flow Rate (cfs) | 0.1202 | Minimum Flow Rate (l/s) | 3.405 |
Maximum Head (ft) | 2.50 | Maximum Head (m) | 0.7620 |
Maximum Flow Rate (cfs) | 16.13 | Maximum Flow Rate (l/s) | 456.9 |
Equation=cfs, ft | 4*H1.522 | ||
Equation=l/s, m | 690.9*H1.522 | ||
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18-inch Montana Flume
Minimum Head (ft) | 0.10 | Minimum Head (m) | 0.0305 |
Minimum Flow Rate (cfs) | 0.1738 | Minimum Flow Rate (l/s) | 4.923 |
Maximum Head (ft) | 2.50 | Maximum Head (m) | 0.7620 |
Maximum Flow Rate (cfs) | 24.56 | Maximum Flow Rate (l/s) | 695.5 |
Equation=cfs, ft | 6*H1.538 | ||
Equation=l/s, m | 1056*H1.538 | ||
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24-inch Montana Flume
Minimum Head (ft) | 0.10 | Minimum Head (m) | 0.0305 |
Minimum Flow Rate (cfs) | 0.4227 | Minimum Flow Rate (l/s) | 11.97 |
Maximum Head (ft) | 2.50 | Maximum Head (m) | 0.7620 |
Maximum Flow Rate (cfs) | 33.11 | Maximum Flow Rate (l/s) | 937.5 |
Equation=cfs, ft | 8*H1.55 | ||
Equation=l/s, m | 1,429*H1.55 | ||
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36-inch Montana Flume
Minimum Head (ft) | 0.15 | Minimum Head (m) | 0.0457 |
Minimum Flow Rate (cfs) | 0.6151 | Minimum Flow Rate (l/s) | 17.42 |
Maximum Head (ft) | 2.50 | Maximum Head (m) | 0.7620 |
Maximum Flow Rate (cfs) | 50.39 | Maximum Flow Rate (l/s) | 1,427 |
Equation=cfs, ft | 12*H1.566 | ||
Equation=l/s, m | 2,184*H1.566 | ||
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48-inch Montana Flume
Minimum Head (ft) | 0.20 | Minimum Head (m) | 0.0610 |
Minimum Flow Rate (cfs) | 1.262 | Minimum Flow Rate (l/s) | 35.75 |
Maximum Head (ft) | 2.50 | Maximum Head (m) | 0.7620 |
Maximum Flow Rate (cfs) | 67.93 | Maximum Flow Rate (l/s) | 1,924 |
Equation=cfs, ft | 16*H1.578 | ||
Equation=l/s, m | 2,184*H1.578 | ||
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60-inch Montana Flume
Minimum Head (ft) | 0.20 | Minimum Head (m) | 0.0610 |
Minimum Flow Rate (cfs) | 1.555 | Minimum Flow Rate (l/s) | 44.04 |
Maximum Head (ft) | 2.50 | Maximum Head (m) | 0.7620 |
Maximum Flow Rate (cfs) | 80.53 | Maximum Flow Rate (l/s) | 2,425 |
Equation=cfs, ft | 20*H1.587 | ||
Equation=l/s, m | 3,732*H1.587 | ||
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72-inch Montana Flume
Minimum Head (ft) | 0.20 | Minimum Head (m) | 0.0610 |
Minimum Flow Rate (cfs) | 2.630 | Minimum Flow Rate (l/s) | 74.48 |
Maximum Head (ft) | 2.50 | Maximum Head (m) | 0.7620 |
Maximum Flow Rate (cfs) | 103.5 | Maximum Flow Rate (l/s) | 2,931 |
Equation=cfs, ft | 24*H1.595 | ||
Equation=l/s, m | 4,251*H1.595 | ||
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84-inch Montana Flume
Minimum Head (ft) | 0.25 | Minimum Head (m) | 0.0610 |
Minimum Flow Rate (cfs) | 3.043 | Minimum Flow Rate (l/s) | 86.17 |
Maximum Head (ft) | 2.50 | Maximum Head (m) | 0.7620 |
Maximum Flow Rate (cfs) | 121.4 | Maximum Flow Rate (l/s) | 3,438 |
Equation=cfs, ft | 28*H1.601 | ||
Equation=l/s, m | 5,318*H1.601 | ||
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96-inch Montana Flume
Minimum Head (ft) | 0.25 | Minimum Head (m) | 0.0762 |
Minimum Flow Rate (cfs) | 3.449 | Minimum Flow Rate (l/s) | 97.66 |
Maximum Head (ft) | 2.50 | Maximum Head (m) | 0.7620 |
Maximum Flow Rate (cfs) | 139.5 | Maximum Flow Rate (l/s) | 3,951 |
Equation=cfs, ft | 32*H1.607 | ||
Equation=l/s, m | 6,115*H1.607 | ||
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120-inch Montana Flume
Minimum Head (ft) | 0.30 | Minimum Head (m) | 0.0914 |
Minimum Flow Rate (cfs) | 5.737 | Minimum Flow Rate (l/s) | 162.5 |
Maximum Head (ft) | 2.75 | Maximum Head (m) | 0.8382 |
Maximum Flow Rate (cfs) | 198.7 | Maximum Flow Rate (l/s) | 5,627 |
Equation=cfs, ft | 39.38*H1.6 | ||
Equation=l/s, m | 7,463*H1.6 | ||
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144-inch Montana Flume
Minimum Head (ft) | 0.33 | Minimum Head (m) | 0.1006 |
Minimum Flow Rate (cfs) | 7.932 | Minimum Flow Rate (l/s) | 224.6 |
Maximum Head (ft) | 3.50 | Maximum Head (m) | 1.0668 |
Maximum Flow Rate (cfs) | 347.0 | Maximum Flow Rate (l/s) | 9826 |
Equation=cfs, ft | 46.75*H1.6 | ||
Equation=l/s, m | 8,859*H1.6 | ||
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