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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 2026-10-13); streamflow classes place each USGS gauge's latest reading against its own day-of-year record.

Health score

53

Moderate

Drought index

200

Severe

Area in D2+

0%

0% exceptional (D4)

Gauges below normal

67%

of 9 reporting

Median flow

70%

p18 of record

Water assets

1,915

105 springs · 1,139 wells

USGS gauges (11)

RAPID CREEK ABOVE WRF NEAR RAPID CITY, SD
0641880022 cfsp6 · much below normal
CLEGHORN SPRINGS AT RAPID CITY, SD
064128109 cfsp9 · much below normal
RHOADS FORK NEAR ROCHFORD, SD
064087004 cfsp10 · much below normal
RAPID CREEK AT RAPID CITY, SD
0641400023 cfsp12 · below normal
RAPID CREEK ABOVE CANYON LAKE NEAR RAPID CITY, SD
064125008 cfsp18 · below normal
CASTLE CR ABOVE DEERFIELD RES NEAR HILL CITY, SD
064090008 cfsp20 · below normal
RAPID CREEK BELOW PACTOLA DAM, SD
0641150017 cfsp34 · normal
RAPID CR NEAR FARMINGDALE, SD
0642150041 cfsp37 · normal
RAPID CREEK ABOVE PACTOLA RES AT SILVER CITY, SD
0641050035 cfsp56 · normal
CASTLE CREEK BELOW DEERFIELD DAM, SD
0641000010 cfsno long-term record
RAPID CREEK BLW CLEGHORN SPGS AT RAPID CITY SD
0641290035 cfsno long-term record

Recent conditions

Date	DSCI	D2+ %	Gauges low	Flow pct
2026-10-20	200	0	6/9	p18
2026-10-19	200	0	5/9	p24
2026-10-18	200	0	5/9	p16
2026-10-17	200	0	5/9	p20
2026-10-16	200	0	6/9	p18
2026-10-15	200	0	4/9	p25
2026-10-14	200	0	5/9	p25
2026-10-13	200	0	5/9	p19
2026-10-12	200	0	5/9	p24
2026-10-11	200	0	5/9	p21
2026-10-10	200	0	5/9	p20
2026-10-09	200	0	5/9	p23
2026-10-08	200	0	5/9	p20
2026-10-07	200	0	5/9	p23

Top water assets

View on the map All Missouri sub-basins