Wynoochee Lake water level — Washington
Wynoochee Lake in Washington was last measured at 749.36 ft (datum NGVD29), as of Aug 31, 2026, 12:45 AM (UTC-07:00) (USGS Water Services). Over its recent trend window the level has been falling (−11.0 ft). This reading is provisional and subject to revision.
- % of conservation pool full
- Not reported
- Storage
- 24,990 acre-ft
- Recent trend
- ↓Falling
−11.0 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 12035380, 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 41 sq mi of contributing watershed.
The dam behind Wynoochee Lake
Wynoochee Lake is held back by Wynoochee , a concrete gravity structure, resisting the reservoir by its own weight alone , standing 175 ft high and running 1,700 ft along its crest , built across Wynoochee River in Grays Harbor County , near Montesano . It was completed in 1972 , and is owned by City of Aberdeen (a local government owner) , to a design credited to U.S. Army Corps of Engineers.
Its recorded primary purpose is water supply — delivering water to its customers comes first, so drawdown here follows demand as much as it follows rainfall . It also serves water supply;fish and wildlife pond;recreation;hydroelectric;flood risk reduction.
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. Its outlet works use slide (sluice gate)2;tainter (radial)2.
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. Its most recent condition assessment was satisfactory — no deficiencies recognised for expected loading. That assessment is dated 04/11/2023.
At its normal pool the reservoir covers about 1,126 acres. NID records a maximum storage of 76,000 acre-ft against a normal storage of 69,405 acre-ft. Its maximum discharge capacity is 52,500 cubic feet per second.
Dam facts: National Inventory of Dams record WA00302 , filed by Federal Energy Regulatory Commission — 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 Wynoochee Lake compares nearby
5 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 |
|---|---|---|---|
| Lake Quinault | WA | 184.12 ft | 21 km |
| Lake Tapps | WA | 540.91 ft | 108 km |
| Sammamish Lake | WA | 25.72 ft | 114 km |
| Mud Mountain Lake | WA | 917.85 ft | 129 km |
| Howard a Hanson Reservoir | WA | 1,153.37 ft | 138 km |
| South Fork Tolt Reservoir | WA | 1,735.96 ft | 148 km |
Frequently asked questions
- What is the current water level of Wynoochee Lake?
- As of Aug 31, 2026, 12:45 AM (UTC-07:00), the pool elevation was 749.36 ft (datum NGVD29), provisional and subject to revision. See the trend chart above for the recent direction.
- Is Wynoochee 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 12035380, retrieved Aug 31, 2026, 8:24 AM (UTC+00:00).
More in Washington
See every lake tracked in Washington, or read the methodology behind these figures.