USGS Streamgage 06404998
Grace Coolidge Creek near Game Lodge near Custer, SD
Grace Coolidge Creek near Game Lodge near Custer, SD is USGS streamgage 06404998, monitoring river discharge in hydrologic subbasin 10120109. It drains a watershed of about 27 square miles. Discharge records at this site go back to 1945. Typical flow runs near 3.2 cfs in July and 2.7 cfs in April, with the higher of the two arriving in July.
Gauge details
- Drainage area
- 27 sq mi
- Gauge elevation
- 4,123 ft
- Subbasin (HUC-8)
- 10120109
- Coordinates
- 43.7611, -103.36408
- USGS site number
- 06404998
- Records begin
- 1945-10-01 (81 years)
Typical flow by month
Long-term daily discharge percentiles from the USGS record (up to 50 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 | 0.6 | 1.3 | 3.4 | |
| February | 0.6 | 1.3 | 3.1 | |
| March | 0.7 | 1.6 | 4.5 | |
| April | 0.9 | 2.7 | 9.5 | |
| May | 0.9 | 5.5 | 41.6 | |
| June | 0.7 | 5 | 30 | |
| July | 0.5 | 3.2 | 12.2 | |
| August | 0.4 | 2.2 | 9.5 | |
| September | 0.4 | 1.4 | 5.7 | |
| October | 0.6 | 1.7 | 7 | |
| November | 0.8 | 1.7 | 4.9 | |
| December | 0.7 | 1.5 | 3.7 |
All values in cubic feet per second (cfs).