USGS Streamgage 06185110
Big Muddy Creek near mouth near Culbertson, MT
Big Muddy Creek near mouth near Culbertson, MT is USGS streamgage 06185110 in Montana, monitoring river discharge in hydrologic subbasin 10060006. It drains a watershed of about 2,717 square miles. Discharge records at this site go back to 1981. Typical flow runs near 9.8 cfs in July and 31.8 cfs in April, with the higher of the two arriving in April.
Gauge details
- State
- Montana
- Drainage area
- 2,717 sq mi
- Gauge elevation
- 1,902 ft
- Subbasin (HUC-8)
- 10060006
- Coordinates
- 48.16448, -104.62952
- USGS site number
- 06185110
- Records begin
- 1981-10-01 (45 years)
Typical flow by month
Long-term daily discharge percentiles from the USGS record (up to 44 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 | 1.2 | 9.6 | |
| February | 0 | 2.4 | 17.6 | |
| March | 0.5 | 13.9 | 428.3 | |
| April | 3.3 | 31.8 | 502.7 | |
| May | 0.7 | 28 | 241.4 | |
| June | 0.1 | 11.2 | 195.5 | |
| July | 0 | 9.8 | 122.3 | |
| August | 0 | 2.7 | 73.7 | |
| September | 0 | 1.2 | 80.3 | |
| October | 0 | 4.6 | 70.2 | |
| November | 0 | 5.7 | 27.8 | |
| December | 0 | 3.3 | 17 |
All values in cubic feet per second (cfs).