USGS Streamgage 06473000
James River at Ashton, SD
James River at Ashton, SD is USGS streamgage 06473000, monitoring river discharge in hydrologic subbasin 10160006. It drains a watershed of about 9,712 square miles. Discharge records at this site go back to 1945. Typical flow runs near 236.8 cfs in July and 327.4 cfs in April, with the higher of the two arriving in April.
Gauge details
- Drainage area
- 9,712 sq mi
- Gauge elevation
- 1,251 ft
- Subbasin (HUC-8)
- 10160006
- Coordinates
- 44.99831, -98.48093
- USGS site number
- 06473000
- Records begin
- 1945-10-01 (81 years)
Typical flow by month
Long-term daily discharge percentiles from the USGS record (up to 81 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 | 16.4 | 142 | |
| February | 0 | 7.6 | 129.2 | |
| March | 0.1 | 56.5 | 525.3 | |
| April | 16.5 | 327.4 | 2,743.7 | |
| May | 19.6 | 562.7 | 3,155.8 | |
| June | 13.2 | 421 | 2,144.7 | |
| July | 4.3 | 236.8 | 1,821.3 | |
| August | 0.1 | 133.8 | 1,460.6 | |
| September | 0 | 49.9 | 1,323.7 | |
| October | 0 | 44.5 | 845 | |
| November | 0 | 67.1 | 577.5 | |
| December | 0 | 35.7 | 288.8 |
All values in cubic feet per second (cfs).