River Flows & Lake Levels

River flows as of Sept. 13

Cowlitz River below Mayfield Dam – about 2,490 cubic feet per second (cfs)

Nisqually River below LaGrande Dam – 784 cfs

Wynoochee River above Black Creek – 244 cfs

Wynoochee River at Grisdale – 203 cfs

Green River at Palmer (Tacoma Water’s headworks) – 209 cfs

North Fork Skokomish River below Cushman Dam No. 2 – 194 cfs

Check out water safety resources. River flows can change at any time.

Subscribe to available Water Alerts provided by the US Geological Survey.

Lake levels and boat launches as of Sept. 13

Riffe Lake – 724.41 feet of elevation (maximum of approx. 749 ft)
Learn about changes to Riffe Lake levels.
Mossyrock Park boat launch is open.
Taidnapam North boat launch is open.
Kosmos boat launch and parking lot are closed.
Taidnapam Park boat launch is closed.
Mossyrock Park swim area is open.

Alder Lake – 1,177.59 feet of elevation (maximum of 1,207 ft)
Alder Lake Park boat launch is open.
Rocky Point boat launch is closed.
Stacel Point swim area is closed.
Sunny Beach Point swim area is closed.

Mayfield Lake – may fluctuate 4 feet weekly, between 421 and 425 feet of elevation (maximum of 425 ft)
Mayfield Lake Park boat launch – normally usable for medium-sized watercraft
Visually check launch conditions before launching
Tacoma Power will lower Mayfield Lake to 415 feet of elevation Sept. 15-30 in order to repair and extend the Mayfield Lake Park boat launch. All boat launches will be inoperable and the shoreline will be closed. Learn more at MyTPU.org/Cowlitz.

Lake Cushman – 720.73 feet of elevation (maximum of 738 ft)
Skokomish Park at Lake Cushman boat launch is open.
The Lake Kokanee boat launch is open.
The Lake Cushman Resort and its marina are closed. The former owner decided to end the lease, so Tacoma Power is now evaluating options for future use of the site. No public access is allowed at this time. We apologize for any inconvenience. Get more information at MyTPU.org/Cushman.

Wynoochee Lake –  740.3 feet of elevation (maximum of 800 ft)
Coho Campground is open; the boat launch is closed.

Get current campfire rules on the Parks & Recreation homepage.