Lewis and Clark Lake HUC8 10170101
A 8,363 km² sub-basin of the Missouri region in NE, 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
57
Moderate
Drought index
286
Severe
Area in D2+
85.58%
0% exceptional (D4)
Gauges below normal
33%
of 3 reporting
Median flow
64%
p33 of record
Water assets
6,260
3 springs · 4,339 wells
USGS gauges (5)
- Bow Creek near Wynot, Nebr.0647852232 cfsp24 · below normal
- Bazile Creek at Center, Nebr.0646640031 cfsp33 · normal
- Bazile Creek near Niobrara, Nebr.0646650036 cfsp52 · normal
- CHOTEAU CR NR AVON, SD064532551 cfsno long-term record
- Howe Creek below Walker Draw near Center, Nebr.0646647010 cfsno long-term record
Recent conditions
| Date | DSCI | D2+ % | Gauges low | Flow pct |
|---|---|---|---|---|
| 2026-09-07 | 286 | 85.58 | 1/3 | p33 |
Top water assets
- 76Leslie Bohlmannwell
- 76Ernest R Nammingawell
- 76Steve Heitmanwell
- 76Joe & John Trudeauwell
- 76Roger W & Maureen A Evanswell
- 76Bon Homme Httrn Brthriver
- 76Berwyn/Wayne Svobodariver
- 76Joe Donnellywell
- 76Kathleen Chicoinewell
- 76Joseph J Holzbauerwell