Lake Shannon at Concrete water level — Washington
Lake Shannon at Concrete in Washington was last measured at 410.53 ft (datum NAVD88), as of Aug 31, 2026, 12:00 AM (UTC-07:00) (USGS Water Services). Over its recent trend window the level has been falling (−6.0 ft). This reading is provisional and subject to revision.
- % of conservation pool full
- Not reported
- Storage
- Not reported
- Recent trend
- ↓Falling
−6.0 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 12193000, 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 297 sq mi of contributing watershed.
The dam behind Lake Shannon at Concrete
Lake Shannon at Concrete is held back by Lower Baker , a concrete arch, curved upstream so the load is carried sideways into the abutments , standing 285 ft high and running 550 ft along its crest , built across Baker River in Skagit County , near Concrete . It was completed in 1927 , and is owned by Puget Sound Energy (a private owner) .
Its recorded primary purpose is hydroelectric — releases follow generation schedules, so the level can move on a daily cycle that has nothing to do with drought . It also serves hydroelectric;recreation.
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)23.
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 poor — a deficiency was recognised that needs attention. That assessment is dated 04/11/2023.
At its normal pool the reservoir covers about 2,278 acres. NID records a maximum storage of 146,279 acre-ft against a normal storage of 146,279 acre-ft. Its maximum discharge capacity is 54,000 cubic feet per second.
Dam facts: National Inventory of Dams record WA00172 , 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 Lake Shannon at Concrete 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 |
|---|---|---|---|
| Baker Lake | WA | 725.81 ft | 12 km |
| Spada Lake | WA | 1,425.95 ft | 64 km |
| South Fork Tolt Reservoir | WA | 1,735.96 ft | 95 km |
| Sammamish Lake | WA | 25.72 ft | 112 km |
| Howard a Hanson Reservoir | WA | 1,153.37 ft | 141 km |
| Conconcully Reservoir | WA | 2,255.39 ft | 147 km |
Frequently asked questions
- What is the current water level of Lake Shannon at Concrete?
- As of Aug 31, 2026, 12:00 AM (UTC-07:00), the pool elevation was 410.53 ft (datum NAVD88), provisional and subject to revision. See the trend chart above for the recent direction.
- Is Lake Shannon at Concrete 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 12193000, 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.