USGS Streamgage 06395000
Cheyenne River at Edgemont, SD
Cheyenne River at Edgemont, SD is USGS streamgage 06395000, monitoring river discharge in hydrologic subbasin 10120106. It drains a watershed of about 7,171 square miles. Discharge records at this site go back to 1903. Typical flow runs near 20.5 cfs in July and 29.8 cfs in April, with the higher of the two arriving in April.
Gauge details
- Drainage area
- 7,171 sq mi
- Gauge elevation
- 3,420 ft
- Subbasin (HUC-8)
- 10120106
- Coordinates
- 43.30553, -103.82103
- USGS site number
- 06395000
- Records begin
- 1903-07-01 (123 years)
Typical flow by month
Long-term daily discharge percentiles from the USGS record (up to 80 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 | 6.4 | 30.3 | |
| February | 0.7 | 17.3 | 99 | |
| March | 10.1 | 51.8 | 347.4 | |
| April | 4.5 | 29.8 | 137.8 | |
| May | 3.3 | 31.4 | 421.3 | |
| June | 1.8 | 47.1 | 524.5 | |
| July | 0.3 | 20.5 | 277.9 | |
| August | 0 | 10.5 | 146 | |
| September | 0 | 4.7 | 41.6 | |
| October | 0.1 | 8.8 | 47.9 | |
| November | 0.5 | 12.2 | 32.5 | |
| December | 0.2 | 7.9 | 25.5 |
All values in cubic feet per second (cfs).