Middle Cheyenne-Elk HUC8 10120111
A 4,089 km² sub-basin of the Missouri region in SD. Drought coverage is from the US Drought Monitor (map of 2026-09-01); streamflow classes place each USGS gauge's latest reading against its own day-of-year record.
Health score
48
Stressed
Drought index
281
Severe
Area in D2+
80.22%
0% exceptional (D4)
Gauges below normal
67%
of 3 reporting
Median flow
32%
p14 of record
Water assets
2,919
70 springs · 1,766 wells
USGS gauges (5)
- CHEYENNE RIVER NEAR WASTA, SD0642350031 cfsp7 · much below normal
- BOXELDER CREEK NEAR NEMO, SD064225002 cfsp14 · below normal
- ELK CREEK NEAR ELM SPRINGS, SD064255000 cfsp62 · normal
- STAGEBARN CANYON CR ABV ELK CR NR SUMMERSET, SD064250500 cfsno long-term record
- ELK CREEK NEAR RAPID CITY, SD064251000 cfsno long-term record
Recent conditions
| Date | DSCI | D2+ % | Gauges low | Flow pct |
|---|---|---|---|---|
| 2026-09-07 | 281 | 80.22 | 2/3 | p14 |
Top water assets
- 78Darvin E Knappwell
- 78Sd Ellsworth Development Authoritywell
- 78Mattie S Burkeriver
- 78Anderson Brothersriver
- 78Frank B Woodriver
- 78John W Allenriver
- 76Dr Joseph Lytleriver
- 76Gus W. Wolffriver
- 76G H Goffriver
- 76Bernard Heidgerkenriver