Redwater HUC8 10120203
A 2,721 km² sub-basin of the Missouri region in SD, WY. 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
46
Stressed
Drought index
400
Exceptional
Area in D2+
100%
0% exceptional (D4)
Gauges below normal
43%
of 7 reporting
Median flow
82%
p28 of record
Water assets
2,001
207 springs · 1,254 wells
USGS gauges (8)
- REDWATER CREEK AT WY-SD STATE LINE0643050012 cfsp12 · below normal
- REDWATER RIVER ABOVE BELLE FOURCHE, SD0643300043 cfsp22 · below normal
- SPEARFISH CREEK NEAR LEAD, SD0643077021 cfsp24 · below normal
- SPEARFISH CREEK AT SPEARFISH, SD0643150038 cfsp28 · normal
- LITTLE SPEARFISH CREEK NEAR LEAD, SD0643085015 cfsp37 · normal
- MURRAY DITCH ABOVE HEADGATE AT WY-SD STATE LINE0642999715 cfsp81 · above normal
- ANNIE CREEK NEAR LEAD, SD064308001 cfsp84 · above normal
- CLEOPATRA CREEK NEAR SPEARFISH, SD064308981 cfsno long-term record
Recent conditions
| Date | DSCI | D2+ % | Gauges low | Flow pct |
|---|---|---|---|---|
| 2026-09-07 | 400 | 100 | 3/7 | p28 |
Top water assets
- 76A G Mannoldriver
- 76Elkhorn Ridge @ Frawley Ranches Llcwell
- 76J H Pearsonriver
- 76City Of Spearfishriver
- 76Centennial Prairie Ranchwell
- 76Black Hills Traction Companylake
- 76Travis & Jody Schenkriver
- 76Roland Bryanwell
- 76Redwater Irrigation Assocriver
- 76James Rathburnwell