Green Peter Lake water level — Oregon
Green Peter Lake in Oregon was last measured at 919.09 ft (datum NGVD29), as of Aug 31, 2026, 1:10 AM (UTC-07:00) (USGS Water Services). Over its recent trend window the level has been falling (−19.1 ft). This reading is provisional and subject to revision.
- % of conservation pool full
- Not reported
- Storage
- Not reported
- Recent trend
- ↓Falling
−19.1 ft over the trend window
Recent trend
Readings this station published between Jun 2, 2026 and Aug 31, 2026 — a 89-day window — downsampled for display.
Data: USGS Water Services (waterservices.usgs.gov) and USACE CWMS Data (cwms-data.usace.army.mil), retrieved 2026-08-31. Both public domain (a work of the U.S. Government, 17 U.S.C. §105).
Source: USGS site 14186100, retrieved Aug 31, 2026, 8:24 AM (UTC+00:00). Official page for this lake →
About this gauge's record
This site's drainage basin covers approximately 273 sq mi of contributing watershed.
The dam behind Green Peter Lake
Green Peter Lake is held back by Green Peter Dam (also recorded as Green Peter Lake) , a concrete gravity structure, resisting the reservoir by its own weight alone , standing 378 ft high and running 1,517 ft along its crest , built across MIDDLE SANTIAM RIVER in Linn County , near SWEETHOME . It was completed in 1967 , and is owned by USACE - Portland District (a federal owner) , to a design credited to CENWP.
Its recorded primary purpose is flood risk reduction — the pool is drawn down between storms so there is empty space waiting for the next flood, which is why this level can fall in dry weather and climb sharply after rain . It also serves flood risk reduction;other;irrigation;navigation;recreation;hydroelectric.
It is founded on rock, with a concrete core. Its spillway is gated, so the operator can hold the pool above the spillway crest and meter what leaves. The spillway opening is 100 ft wide.
NID classes it high hazard potential. That describes what a failure would cost downstream — loss of life would be expected — and says nothing about how likely a failure is, or what condition the dam is in.
At its normal pool the reservoir covers about 3,720 acres. NID records a maximum storage of 430,000 acre-ft against a normal storage of 160,000 acre-ft. Its maximum discharge capacity is 110,000 cubic feet per second.
Dam facts: National Inventory of Dams record OR00010 , filed by US Army Corps of Engineers — U.S. Army Corps of Engineers, public domain. Water levels above come from USGS Water Services and are a separate source. (How this dam was matched to this gauge →)
How Green Peter Lake compares nearby
4 of 6 nearby lakes with a current trend are also falling right now.
Nearby lakes
The six nearest published lakes by centroid distance (great-circle) — cross-state neighbors included.
| Lake | State | Level | Distance |
|---|---|---|---|
| Foster Lake at Foster | OR | 636.79 ft | 10 km |
| Blue River Lake | OR | 1,271.18 ft | 36 km |
| Detroit Lake | OR | 1,528.67 ft | 38 km |
| Big Cliff Lake | OR | 1,200.34 ft | 40 km |
| Cougar Lake | OR | 1,559.39 ft | 43 km |
| Fall Creek Lake | OR | 794.86 ft | 59 km |
Frequently asked questions
- What is the current water level of Green Peter Lake?
- As of Aug 31, 2026, 1:10 AM (UTC-07:00), the pool elevation was 919.09 ft (datum NGVD29), provisional and subject to revision. See the trend chart above for the recent direction.
- Is Green Peter Lake full right now?
- Its managing agency does not publish a %-of-conservation-pool-full figure for this lake, so we show the bare level rather than estimate one.
- Where does this data come from?
- From USGS site 14186100, retrieved Aug 31, 2026, 8:24 AM (UTC+00:00).
More in Oregon
See every lake tracked in Oregon, or read the methodology behind these figures.