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 2026-10-13); streamflow classes place each USGS gauge's latest reading against its own day-of-year record.
Health score
52
Moderate
Drought index
220
Severe
Area in D2+
20.33%
0% exceptional (D4)
Gauges below normal
67%
of 3 reporting
Median flow
50%
p18 of record
Water assets
2,919
70 springs · 1,766 wells
USGS gauges (5)
- CHEYENNE RIVER NEAR WASTA, SD0642350075 cfsp10 · much below normal
- BOXELDER CREEK NEAR NEMO, SD064225003 cfsp18 · below normal
- ELK CREEK NEAR ELM SPRINGS, SD064255000 cfsp51 · 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 |
|---|---|---|---|---|
| 2026-10-22 | 220 | 20.33 | 2/3 | p18 |
| 2026-10-21 | 220 | 20.33 | 2/3 | p19 |
| 2026-10-20 | 220 | 20.33 | 2/3 | p18 |
| 2026-10-19 | 220 | 20.33 | 2/3 | p18 |
| 2026-10-18 | 220 | 20.33 | 2/3 | p18 |
| 2026-10-17 | 220 | 20.33 | 2/3 | p18 |
| 2026-10-16 | 220 | 20.33 | 2/3 | p18 |
| 2026-10-15 | 220 | 20.33 | 2/3 | p21 |
| 2026-10-14 | 220 | 20.33 | 2/3 | p24 |
| 2026-10-13 | 220 | 20.33 | 2/2 | p15 |
| 2026-10-12 | 220 | 20.33 | 2/2 | p17 |
| 2026-10-11 | 220 | 20.33 | 2/3 | p18 |
| 2026-10-10 | 220 | 20.33 | 2/3 | p18 |
| 2026-10-09 | 220 | 20.33 | 2/3 | p21 |
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