Rapid HUC8 10120110
A 1,852 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
52
Moderate
Drought index
300
Extreme
Area in D2+
100%
0% exceptional (D4)
Gauges below normal
50%
of 10 reporting
Median flow
69%
p24 of record
Water assets
1,915
105 springs · 1,139 wells
USGS gauges (11)
- RAPID CREEK ABOVE PACTOLA RES AT SILVER CITY, SD0641050016 cfsp8 · much below normal
- RAPID CREEK AT RAPID CITY, SD0641400029 cfsp11 · below normal
- RHOADS FORK NEAR ROCHFORD, SD064087004 cfsp19 · below normal
- RAPID CREEK ABOVE WRF NEAR RAPID CITY, SD0641880024 cfsp20 · below normal
- CASTLE CR ABOVE DEERFIELD RES NEAR HILL CITY, SD064090008 cfsp22 · below normal
- CASTLE CREEK BELOW DEERFIELD DAM, SD0641000010 cfsp26 · normal
- CLEGHORN SPRINGS AT RAPID CITY, SD0641281010 cfsp26 · normal
- RAPID CR NEAR FARMINGDALE, SD0642150020 cfsp27 · normal
- RAPID CREEK ABOVE CANYON LAKE NEAR RAPID CITY, SD0641250035 cfsp37 · normal
- RAPID CREEK BELOW PACTOLA DAM, SD0641150046 cfsp38 · normal
- RAPID CREEK BLW CLEGHORN SPGS AT RAPID CITY SD0641290035 cfsno long-term record
Recent conditions
| Date | DSCI | D2+ % | Gauges low | Flow pct |
|---|---|---|---|---|
| 2026-09-07 | 300 | 100 | 5/10 | p24 |
Top water assets
- 76City Of Rapid Cityriver
- 76Iowa Irrigation Ditch Coriver
- 76George Sandersriver
- 76Darlene Mayriver
- 76Hawthorne Ditch Coriver
- 76City Of Rapid Cityriver
- 76Dakota Power Companywell
- 76Jean Lymanriver
- 76South Side Ditchriver
- 76Dept Of Game Fish & Parksspring