USGS Streamgage 06402600
Cheyenne River near Buffalo Gap, SD
Cheyenne River near Buffalo Gap, SD is USGS streamgage 06402600, monitoring river discharge in hydrologic subbasin 10120109. It drains a watershed of about 9,792 square miles. Discharge records at this site go back to 1968. Typical flow runs near 53.5 cfs in July and 69.7 cfs in April, with the higher of the two arriving in April.
Gauge details
- Drainage area
- 9,792 sq mi
- Gauge elevation
- 2,818 ft
- Subbasin (HUC-8)
- 10120109
- Coordinates
- 43.50196, -103.07441
- USGS site number
- 06402600
- Records begin
- 1968-10-01 (58 years)
Typical flow by month
Long-term daily discharge percentiles from the USGS record (up to 58 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 | 41.7 | 61.4 | 108.9 | |
| February | 49 | 65.6 | 122 | |
| March | 54.4 | 70.3 | 411.6 | |
| April | 47.7 | 69.7 | 258.4 | |
| May | 42.7 | 69.6 | 931.8 | |
| June | 36.5 | 62.3 | 817.3 | |
| July | 25.6 | 53.5 | 193.6 | |
| August | 39.5 | 63.5 | 116.8 | |
| September | 49.6 | 68.3 | 98.6 | |
| October | 55.3 | 70.5 | 117.2 | |
| November | 58.1 | 70.4 | 107.1 | |
| December | 40.6 | 66.1 | 114.1 |
All values in cubic feet per second (cfs).
Other gauges in this subbasin
- French Creek above Stockade Lake near Custer, SD
- French Creek above Fairburn, SD
- Cheyenne River at Red Shirt, SD
- Battle Creek above Keystone, SD
- Grizzly Bear Creek near Keystone, SD
- Battle Creek near Keystone, SD
- Grace Coolidge Creek near Hayward, SD
- Grace Coolidge Creek near Game Lodge near Custer, SD