USGS Streamgage 06169500
Rock Creek below Horse Creek near int'l boundary
Rock Creek below Horse Creek near int'l boundary is USGS streamgage 06169500 in Montana, monitoring river discharge in hydrologic subbasin 10050015. It drains a watershed of about 322 square miles. Discharge records at this site go back to 1916. Typical flow runs near 1.5 cfs in July and 14.9 cfs in April, with the higher of the two arriving in April.
Gauge details
- State
- Montana
- Drainage area
- 322 sq mi
- Gauge elevation
- 2,527 ft
- Subbasin (HUC-8)
- 10050015
- Coordinates
- 48.96937, -106.83984
- USGS site number
- 06169500
- Records begin
- 1916-03-01 (110 years)
Typical flow by month
Long-term daily discharge percentiles from the USGS record (up to 68 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 | 0.2 | 2.3 | |
| February | 0 | 0.3 | 12.5 | |
| March | 0.4 | 8.1 | 192 | |
| April | 4 | 14.9 | 252.2 | |
| May | 2.5 | 6.8 | 39.6 | |
| June | 1 | 4.2 | 33.9 | |
| July | 0.1 | 1.5 | 16.4 | |
| August | 0 | 0.2 | 2.9 | |
| September | 0 | 0.4 | 3.6 | |
| October | 0.3 | 1.5 | 5.1 | |
| November | 0.7 | 1.9 | 4.5 | |
| December | 0.2 | 0.9 | 3.1 |
All values in cubic feet per second (cfs).