Clackamas HUC8 17090011
A 2,442 km² sub-basin of the Pacific Northwest region in OR. 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
62
Moderate
Drought index
233
Severe
Area in D2+
35.5%
0% exceptional (D4)
Gauges below normal
0%
of 6 reporting
Median flow
111%
p70 of record
Water assets
492
27 springs · 264 wells
USGS gauges (10)
- OAK GROVE FORK ABOVE POWERPLANT INTAKE, OR.14209000300 cfsp37 · normal
- OAK GROVE FORK NEAR GOVERNMENT CAMP, OR1420870078 cfsp42 · normal
- CLACKAMAS RIVER ABOVE THREE LYNX CREEK, OR14209500758 cfsp64 · normal
- CLACKAMAS RIVER NEAR OREGON CITY, OR14211010997 cfsp76 · above normal
- CLACKAMAS RIVER AT ESTACADA, OR142100001,060 cfsp77 · above normal
- OAK GROVE FORK AT RIPPLEBROOK CAMPGROUND, OR14209250310 cfsp92 · much above normal
- CLACKAMAS RIVER AT BIG BOTTOM, OR14208000230 cfsno long-term record
- COLLAWASH R NR BREITENBUSH, OR1420830057 cfsno long-term record
- FISH CREEK NEAR THREE LYNX, OR142097009 cfsno long-term record
- CLEAR CREEK AT CARVER, OR1421075022 cfsno long-term record
Recent conditions
| Date | DSCI | D2+ % | Gauges low | Flow pct |
|---|---|---|---|---|
| 2026-09-07 | 233 | 35.5 | 0/6 | p70 |
Top water assets
- 76Eagle Creek — Power Developmentspring
- 76A Well — Nursery Useswell
- 76A Well — Nursery Useswell
- 76A Well — Nursery Useswell
- 73A Well — Irrigation And Domesticwell
- 67Clackamas River At Big Bottom, Orriver
- 67Gingham Creekriver
- 67Clackamas Riverriver
- 67Oak Grove Fork Near Government Camp, Orriver
- 67Oak Grove Fork Above Powerplant Intake, Or.river