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 2026-10-13); streamflow classes place each USGS gauge's latest reading against its own day-of-year record.
Health score
52
Moderate
Drought index
165
Moderate
Area in D2+
0%
0% exceptional (D4)
Gauges below normal
67%
of 3 reporting
Median flow
51%
p10 of record
Water assets
6,260
3 springs · 4,339 wells
USGS gauges (5)
- Bazile Creek at Center, Nebr.0646640030 cfsp9 · much below normal
- Bow Creek near Wynot, Nebr.0647852235 cfsp10 · much below normal
- Bazile Creek near Niobrara, Nebr.0646650040 cfsp25 · normal
- CHOTEAU CR NR AVON, SD064532551 cfsno long-term record
- Howe Creek below Walker Draw near Center, Nebr.064664708 cfsno long-term record
Recent conditions
| Date | DSCI | D2+ % | Gauges low | Flow pct |
|---|---|---|---|---|
| 2026-10-21 | 165 | 0 | 2/3 | p10 |
| 2026-10-20 | 165 | 0 | 2/3 | p9 |
| 2026-10-19 | 165 | 0 | 2/3 | p17 |
| 2026-10-18 | 165 | 0 | 2/3 | p18 |
| 2026-10-17 | 165 | 0 | 2/3 | p20 |
| 2026-10-16 | 165 | 0 | 1/3 | p26 |
| 2026-10-15 | 165 | 0 | 2/3 | p14 |
| 2026-10-14 | 165 | 0 | 2/3 | p12 |
| 2026-10-13 | 165 | 0 | 2/3 | p12 |
| 2026-10-12 | 165 | 0 | 2/3 | p12 |
| 2026-10-11 | 165 | 0 | 2/3 | p11 |
| 2026-10-10 | 165 | 0 | 2/3 | p11 |
| 2026-10-09 | 165 | 0 | 2/3 | p13 |
| 2026-10-08 | 167 | 0 | 2/3 | p12 |
Top water assets
- 76Leslie Bohlmannwell
- 76Ernest R Nammingawell
- 76Gary/Steve/Gene Heinewell
- 76Steve Heitmanwell
- 76Joe & John Trudeauwell
- 76Roger W & Maureen A Evanswell
- 76Bon Homme Httrn Brthriver
- 76Berwyn/Wayne Svobodariver
- 76Joe Donnellywell
- 76Kathleen Chicoinewell