USGS Streamgage 06439500
Cheyenne River near Eagle Butte, SD
Cheyenne River near Eagle Butte, SD is USGS streamgage 06439500, monitoring river discharge in hydrologic subbasin 10130105. It drains a watershed of about 24,235 square miles. Discharge records at this site go back to 1920. Typical flow runs near 556 cfs in July and 542.5 cfs in April, with the higher of the two arriving in July.
Gauge details
- Drainage area
- 24,235 sq mi
- Gauge elevation
- 1,616 ft
- Subbasin (HUC-8)
- 10130105
- Coordinates
- 44.69637, -101.21737
- USGS site number
- 06439500
- Records begin
- 1920-05-13 (106 years)
Typical flow by month
Long-term daily discharge percentiles from the USGS record (up to 75 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 | 9 | 59.5 | 215.1 | |
| February | 11.4 | 115.3 | 551.9 | |
| March | 119.4 | 496.9 | 4,039 | |
| April | 155.2 | 542.5 | 4,057.3 | |
| May | 99.2 | 505.5 | 5,102.9 | |
| June | 204.5 | 1,240.9 | 9,412 | |
| July | 118.5 | 556 | 2,137.6 | |
| August | 90.5 | 355.5 | 865.9 | |
| September | 65.9 | 277.5 | 625 | |
| October | 74 | 200.6 | 432.8 | |
| November | 57.6 | 158.9 | 348.4 | |
| December | 25.9 | 105.3 | 228 |
All values in cubic feet per second (cfs).