USGS Streamgage 06356500
South Fork Grand River near Cash, SD
South Fork Grand River near Cash, SD is USGS streamgage 06356500, monitoring river discharge in hydrologic subbasin 10130302. It drains a watershed of about 1,306 square miles. Discharge records at this site go back to 1945. Typical flow runs near 16.8 cfs in July and 30.1 cfs in April, with the higher of the two arriving in April.
Gauge details
- Drainage area
- 1,306 sq mi
- Gauge elevation
- 2,426 ft
- Subbasin (HUC-8)
- 10130302
- Coordinates
- 45.64869, -102.64333
- USGS site number
- 06356500
- Records begin
- 1945-12-01 (81 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 | 3.6 | 18.1 | |
| February | 0 | 6.5 | 78.2 | |
| March | 6.6 | 33.5 | 426.1 | |
| April | 13.7 | 30.1 | 270.8 | |
| May | 11.2 | 26.4 | 199.1 | |
| June | 10.3 | 27.6 | 174.5 | |
| July | 5.4 | 16.8 | 88.7 | |
| August | 4.1 | 11.5 | 45.1 | |
| September | 5.5 | 10.5 | 28.1 | |
| October | 7.4 | 12.6 | 38.7 | |
| November | 6 | 11.7 | 23.4 | |
| December | 1.8 | 6.8 | 17.4 |
All values in cubic feet per second (cfs).