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 2026-10-13); 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+
0.2%
0% exceptional (D4)
Gauges below normal
50%
of 2 reporting
Median flow
119%
p52 of record
Water assets
4,216
12 springs · 3,884 wells
USGS gauges (3)
- CRAB CREEK NEAR BEVERLY, WA12472600257 cfsp24 · below normal
- CRAB CREEK NEAR MOSES LAKE, WA1246700086 cfsp80 · above normal
- ROCKY FORD CREEK NEAR EPHRATA, WA1247050059 cfsno long-term record
Recent conditions
| Date | DSCI | D2+ % | Gauges low | Flow pct |
|---|---|---|---|---|
| 2026-10-22 | 200 | 0.2 | 1/2 | p52 |
| 2026-10-21 | 200 | 0.2 | 1/2 | p52 |
| 2026-10-20 | 200 | 0.2 | 1/2 | p51 |
| 2026-10-19 | 200 | 0.2 | 1/2 | p51 |
| 2026-10-18 | 200 | 0.2 | 1/2 | p50 |
| 2026-10-17 | 200 | 0.2 | 1/2 | p50 |
| 2026-10-16 | 200 | 0.2 | 1/2 | p50 |
| 2026-10-15 | 200 | 0.2 | 1/2 | p50 |
| 2026-10-14 | 200 | 0.2 | 1/2 | p50 |
| 2026-10-13 | 200 | 0.2 | 1/2 | p49 |
| 2026-10-12 | 200 | 0.2 | 1/2 | p48 |
| 2026-10-11 | 200 | 0.2 | 1/2 | p47 |
| 2026-10-10 | 200 | 0.2 | 1/2 | p49 |
| 2026-10-09 | 200 | 0.2 | 1/2 | p50 |
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