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 2026-10-13); streamflow classes place each USGS gauge's latest reading against its own day-of-year record.
Health score
54
Moderate
Drought index
282
Severe
Area in D2+
81.88%
0% exceptional (D4)
Gauges below normal
50%
of 6 reporting
Median flow
73%
p24 of record
Water assets
2,001
207 springs · 1,254 wells
USGS gauges (8)
- MURRAY DITCH ABOVE HEADGATE AT WY-SD STATE LINE064299970 cfsp10 · below normal
- LITTLE SPEARFISH CREEK NEAR LEAD, SD0643085012 cfsp13 · below normal
- SPEARFISH CREEK AT SPEARFISH, SD0643150036 cfsp15 · below normal
- ANNIE CREEK NEAR LEAD, SD064308000 cfsp33 · normal
- REDWATER RIVER ABOVE BELLE FOURCHE, SD06433000139 cfsp46 · normal
- REDWATER CREEK AT WY-SD STATE LINE0643050034 cfsp55 · normal
- SPEARFISH CREEK NEAR LEAD, SD06430770no readingno long-term record
- CLEOPATRA CREEK NEAR SPEARFISH, SD064308981 cfsno long-term record
Recent conditions
| Date | DSCI | D2+ % | Gauges low | Flow pct |
|---|---|---|---|---|
| 2026-10-21 | 282 | 81.88 | 3/6 | p24 |
| 2026-10-20 | 282 | 81.88 | 3/6 | p21 |
| 2026-10-19 | 282 | 81.88 | 3/6 | p23 |
| 2026-10-18 | 282 | 81.88 | 3/6 | p23 |
| 2026-10-17 | 282 | 81.88 | 3/6 | p21 |
| 2026-10-16 | 282 | 81.88 | 3/6 | p23 |
| 2026-10-15 | 282 | 81.88 | 3/6 | p25 |
| 2026-10-14 | 282 | 81.88 | 3/6 | p25 |
| 2026-10-13 | 282 | 81.88 | 3/6 | p25 |
| 2026-10-12 | 282 | 81.88 | 3/6 | p28 |
| 2026-10-11 | 282 | 81.88 | 3/6 | p26 |
| 2026-10-10 | 282 | 81.88 | 3/6 | p26 |
| 2026-10-09 | 282 | 81.88 | 3/6 | p27 |
| 2026-10-08 | 282 | 81.88 | 3/6 | 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