You can view current data for Lake Washington levels at the USACE Website here (in left sidebar click on Lake Washington / Lake Washington Elevation)
6.19.2017 – Email from William Dowell, Public Affairs Office, Seattle District, U.S. Army Corps of Engineers
The Lake Washington elevation is currently at 21.97 feet, as measured at the Locks. This is considered full pool of 22 feet. We have been at this elevation since around June 1. Spillway gates are being used to prevent the forebay (the lake side) elevation from exceeding 22 feet.
We are in the annual involuntary draft operations period, where the lake has begun water use that usually exceeds inflows. The weather this year has provided more water than typical and as such the forebay elevation is still hovering at the 22-foot mark. Corps water managers are monitoring to prevent it from rising past 22 feet and expect the elevation to begin dropping soon. I hope the information is helpful. Please let me know if you need anything else.
William Dowell, U.S. Army Corps of Engineers, Work: 206.764.3464, Cell: 206.300.4177
7.27.2016 – Email from William Dowell, Public Affairs Office, Seattle District, U.S. Army Corps of Engineers
What is boils down to is you haven’t heard from us because there is nothing to report, no news is good news. As of today, Lake Washington’s level is about half a foot higher than the same day last year. That 6 inches means a lot and really the differences have been, we’re getting some rain and the cooler temperatures.
I can assure you we’re still keeping an eye on things — having monthly meetings, looking at forecasts and verifying operating procedures. Even though we initially had concerns, the weather has been cooperating. We understand and value the floating home community as a stakeholder and I will continue to communicate to you. Bill Dowell.
Posted 5/4/2016. Release no. 16-012 from the U.S. Army Corps of Engineers
Contact – Bill Dowell on 206-764-3464 or firstname.lastname@example.org
After a really good start, the lake is currently at elevation 21.8 feet, typical for early May and consistent with normal annual operations. However, because of recent dry conditions and forecasts, and significantly earlier than normal snowmelt, Corps water managers intend to complete refill by mid-May instead of the usual June 1 target date.
“If we wait until late May, there may not be sufficient lake inflow to get us to elevation 22 feet,” said Ken Brettmann, senior water manager with the Seattle District, U.S. Army Corps of Engineers.
Getting the lake to 22 feet is extremely important since every inch of water in the 2-foot operating band is needed for fish passage, lockages, and managing water quality throughout the season.
Refilling early last year helped immensely during the record-breaking drought but Corps officials still needed to alter lock operations. Even with the operational changes of the early refill, limiting water usage for smolt flumes, maximizing lockage efficiency and delaying lockages, the lake briefly fell below the 20 foot minimum elevation water managers try to maintain.
“Last year’s challenging drought conditions reinforced how important it is to fill the lake to the 22 foot elevation each year,” said Brettmann.
Depending on conditions, the lake may remain at full pool through June. The official lake level is measured at the Locks. Lake Washington levels may vary due to the natural gradient between the lake and the locks or wind that can push the lake levels up for short durations.
Vessel owners should closely monitor lake elevations and adjust mooring lines as necessary.
More information on Lake Washington’s status is available on the Corps’ Seattle District Reservoir Control Center website at http://bit.ly/NWS-RCC.