USGS Streamgage 06139500
Big Sandy Creek near Havre, MT
Big Sandy Creek near Havre, MT is USGS streamgage 06139500 in Montana, monitoring river discharge in hydrologic subbasin 10050005. It drains a watershed of about 1,787 square miles. Discharge records at this site go back to 1946. Typical flow runs near 7.9 cfs in July and 12.8 cfs in April, with the higher of the two arriving in April.
Gauge details
- State
- Montana
- Drainage area
- 1,787 sq mi
- Gauge elevation
- 2,505 ft
- Subbasin (HUC-8)
- 10050005
- Coordinates
- 48.52671, -109.84158
- USGS site number
- 06139500
- Records begin
- 1946-02-01 (80 years)
Typical flow by month
Long-term daily discharge percentiles from the USGS record (up to 80 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 | — | 0 | — | |
| February | — | 0.1 | — | |
| March | 1 | 11.5 | 927.8 | |
| April | 1 | 12.8 | 134.6 | |
| May | 0.2 | 8.9 | 115.7 | |
| June | 0 | 12.6 | 179.3 | |
| July | 0 | 7.9 | 74.7 | |
| August | 0 | 1.5 | 27 | |
| September | 0 | 0.7 | 21.6 | |
| October | 0 | 2.1 | 39.5 | |
| November | 0 | 0 | 35.4 | |
| December | — | 0 | — |
All values in cubic feet per second (cfs).