USGS Streamgage 06026420
Big Hole River below Hamilton Ditch near Twin Bridges, MT
Big Hole River below Hamilton Ditch near Twin Bridges, MT is USGS streamgage 06026420 in Montana, monitoring river discharge in hydrologic subbasin 10020004. It drains a watershed of about 2,791 square miles. Discharge records at this site go back to 2007. Typical flow runs near 724.4 cfs in July and 1,238.9 cfs in April, with the higher of the two arriving in April.
Gauge details
- State
- Montana
- Drainage area
- 2,791 sq mi
- Gauge elevation
- 4,638 ft
- Subbasin (HUC-8)
- 10020004
- Coordinates
- 45.55002, -112.36068
- USGS site number
- 06026420
- Records begin
- 2007-07-01 (19 years)
Typical flow by month
Long-term daily discharge percentiles from the USGS record (up to 18 years of data), averaged within each month. These describe the historical normal range — they are not a forecast and not today's reading.
Only 8 of 12 months have enough record to summarize; the rest are omitted.
| Month | Low p10 | Typical p50 | High p90 | Range |
|---|---|---|---|---|
| April | — | 1,238.9 | — | |
| May | 922.9 | 2,466.8 | 5,498.1 | |
| June | 1,098.1 | 2,974.7 | 6,738.7 | |
| July | 189.8 | 724.4 | 1,951.5 | |
| August | 53.3 | 150.6 | 466.2 | |
| September | 75.1 | 166.6 | 328.5 | |
| October | 174.8 | 367.5 | 488.9 | |
| November | — | 504.6 | — |
All values in cubic feet per second (cfs).