USGS Streamgage 06439500
Cheyenne River near Eagle Butte, SD
Cheyenne River near Eagle Butte, SD is USGS streamgage 06439500 in South Dakota, monitoring river discharge in hydrologic subbasin 10130105. It sits on the Cheyenne River, alongside 8 other gauges Rivermatics tracks on the same river. 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
- State
- South Dakota
- Drainage area
- 24,235 sq mi
- Gauge elevation
- 1,616 ft
- Subbasin (HUC-8)
- 10130105
- Coordinates
- 44.69639, -101.21694
- 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).
Common questions
- When does Cheyenne River near Eagle Butte, SD normally run highest?
- June, on the long-term record. The median daily flow that month is about 1,240.9 cfs, against 59.5 cfs in January, the lowest month. These are historical normals for the date, not a forecast and not today's reading.
- What is a normal flow for Cheyenne River near Eagle Butte, SD?
- It depends on the month. In January, half of days historically fall near 59.5 cfs, with the middle 80% of days between 9 and 215.1 cfs. The month-by-month table on this page gives the full range.
- How long has Cheyenne River near Eagle Butte, SD been measured?
- Discharge records at USGS site 06439500 begin in 1920, about 106 years, covering roughly 482 days of published daily values. The long record is what makes the monthly percentiles on this page meaningful.
- Where is Cheyenne River near Eagle Butte, SD?
- The gauge sits at 44.69639, -101.21694, in South Dakota, in hydrologic subbasin 10130105, at an elevation of about 1,616 feet, draining roughly 24,235 square miles.
- Can I use Cheyenne River near Eagle Butte, SD data for flood or safety decisions?
- No. Rivermatics provides estimates, not guarantees, and the readings and forecasts here may be delayed, inaccurate, or wrong. Do not use them for navigation or for any safety, rescue, or emergency decision. Check the National Weather Service and USGS directly, and use your own judgment.
Upstream and downstream on the Cheyenne River
Every gauge Rivermatics tracks on this river, ordered by drainage area — upstream first. See the Cheyenne River in full.
- Cheyenne River near Spencer, WY 5,323 sq mi
- Cheyenne River at Edgemont, SD 7,171 sq mi
- Cheyenne River below Angostura Dam, SD 9,097 sq mi
- Cheyenne River near Buffalo Gap, SD 9,792 sq mi
- Cheyenne River at Red Shirt, SD 10,259 sq mi
- Cheyenne River near Scenic, SD 11,208 sq mi
- Cheyenne River near Wasta, SD 12,679 sq mi
- Cheyenne River near Plainview, SD 21,351 sq mi
- Cheyenne River near Eagle Butte, SD this page