USGS Streamgage 06040800
Madison River ab powerplant near McAllister, MT
Madison River ab powerplant near McAllister, MT is USGS streamgage 06040800 in Montana, monitoring river discharge in hydrologic subbasin 10020007. It drains a watershed of about 2,213 square miles. Discharge records at this site go back to 2002. Typical flow runs near 507.1 cfs in July and 241.4 cfs in April, with the higher of the two arriving in July.
Gauge details
- State
- Montana
- Drainage area
- 2,213 sq mi
- Gauge elevation
- 4,703 ft
- Subbasin (HUC-8)
- 10020007
- Coordinates
- 45.48659, -111.63386
- USGS site number
- 06040800
- Records begin
- 2002-04-01 (24 years)
Typical flow by month
Long-term daily discharge percentiles from the USGS record (up to 24 years of data), averaged within each month. These describe the historical normal range — they are not a forecast and not today's reading.
| Month | Low p10 | Typical p50 | High p90 | Range |
|---|---|---|---|---|
| January | 95.5 | 143.6 | 1,111.3 | |
| February | 100.3 | 143.8 | 969.5 | |
| March | 101.8 | 134.8 | 1,088.6 | |
| April | 210.8 | 241.4 | 1,229.9 | |
| May | 234.3 | 856 | 2,562.3 | |
| June | 333 | 1,444.5 | 3,437.7 | |
| July | 136.1 | 507.1 | 1,731.3 | |
| August | 98.3 | 157.5 | 989 | |
| September | 99.8 | 137.8 | 1,334 | |
| October | 101.5 | 165.1 | 1,347.7 | |
| November | 100.8 | 211.7 | 1,462.7 | |
| December | 95.1 | 165.1 | 1,401 |
All values in cubic feet per second (cfs).
Other gauges in this subbasin
- Madison River below Ennis Lake near McAllister, MT
- Madison River near Norris, MT
- Firehole River at Old Faithful, YNP
- Firehole River near West Yellowstone, MT
- Tantalus Creek at Norris Junction, YNP
- Gibbon River at Madison Jct, YNP
- Madison River near West Yellowstone, MT
- Madison River below Hebgen Lake near Grayling, MT