Lower Crab HUC8 17020015
A 6,425 km² sub-basin of the Pacific Northwest region in WA. 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
54
Moderate
Drought index
200
Severe
Area in D2+
0.19%
0% exceptional (D4)
Gauges below normal
50%
of 2 reporting
Median flow
110%
p51 of record
Water assets
4,216
12 springs · 3,884 wells
USGS gauges (3)
- CRAB CREEK NEAR BEVERLY, WA12472600196 cfsp23 · below normal
- CRAB CREEK NEAR MOSES LAKE, WA1246700093 cfsp78 · above normal
- ROCKY FORD CREEK NEAR EPHRATA, WA1247050059 cfsno long-term record
Recent conditions
| Date | DSCI | D2+ % | Gauges low | Flow pct |
|---|---|---|---|---|
| 2026-09-07 | 200 | 0.19 | 1/2 | p51 |
Top water assets
- 80Columbia Plateau Deep Basalt Fossil Aquifer — Central Washingtonfossil_water
- 80Columbia Plateau Basalt Aquifer — Wahluke Slopeaquifer
- 67O'Sullivan Damreservoir
- 65Othello Primary Treatment Pond 1Areservoir
- 65Crab Creekriver
- 65Black Lake Damreservoir
- 65Crab Creek Near Beverly, Wariver
- 65Coyote Lake Damreservoir
- 65Othello Primary Treatment Pond 1Breservoir
- 65Ingredion Process Water Lagoonreservoir