USGS Streamgage 13011820
Blackrock Creek below Split Rock Creek, near Moran, WY
Blackrock Creek below Split Rock Creek, near Moran, WY is USGS streamgage 13011820 in Wyoming, monitoring river discharge in hydrologic subbasin 17040101. It drains a watershed of about 32 square miles. Discharge records at this site go back to 2017. Typical flow runs near 46.1 cfs in July and 14.6 cfs in April, with the higher of the two arriving in July.
Gauge details
- State
- Wyoming
- Drainage area
- 32 sq mi
- Gauge elevation
- 8,578 ft
- Subbasin (HUC-8)
- 17040101
- Coordinates
- 43.80711, -110.17872
- USGS site number
- 13011820
- Records begin
- 2017-10-27 (9 years)
Typical flow by month
Long-term daily discharge percentiles from the USGS record (up to 6 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 | — | 6.2 | — | |
| February | — | 5.3 | — | |
| March | — | 5.3 | — | |
| April | — | 14.6 | — | |
| May | — | 161.2 | — | |
| June | — | 279 | — | |
| July | — | 46.1 | — | |
| August | — | 17.6 | — | |
| September | — | 12.8 | — | |
| October | — | 12.7 | — | |
| November | — | 10.7 | — | |
| December | — | 6.9 | — |
All values in cubic feet per second (cfs).