Middle North Platte-Casper HUC8 10180007
A 8,996 km² sub-basin of the Missouri region in WY. 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
29
Critical
Drought index
319
Extreme
Area in D2+
94.21%
0% exceptional (D4)
Gauges below normal
100%
of 1 reporting
Median flow
17%
p4 of record
Water assets
911
75 springs · 622 wells
USGS gauges (2)
- DEER CREEK IN CANYON, NEAR GLENROCK, WY066460001 cfsp4 · much below normal
- NORTH PLATTE RIVER AT ALCOVA, WY066420002,360 cfsno long-term record
Recent conditions
| Date | DSCI | D2+ % | Gauges low | Flow pct |
|---|---|---|---|---|
| 2026-09-07 | 319 | 94.21 | 1/1 | p4 |
Top water assets
- 70Mcmurry No. 4reservoir
- 69Middle Fork Casper Creekriver
- 69Dry Fork La Prele Creekriver
- 69La Prele Creekriver
- 69Deer Creek In Canyon, Near Glenrock, Wyriver
- 69West Fork Deer Creekriver
- 69Middle Fork Casper Creekriver
- 69Eastdale Creek Detention No.1reservoir
- 69North Platte River At Alcova, Wyriver
- 69Poison Spider Creekriver