Cowlitz River Levels

June 2 2023

33,917 ACRE-FT

Discharge Volume Today

-2770.0 cfs (-13.94%) since yesterday
79.59% of Normal • 4 Streamgauges

Total streamflow across the Cowlitz River was last observed at 17100 cfs, and is expected to yield approximately 33917 acre-ft of water today; about 80% of normal. Average streamflow for this time of year is 21486 cfs, with recent peaks last observed at 95,120 cfs on 2020-02-07.

Maximum discharge along the river is currently at the Cowlitz River At Castle Rock reporting a streamflow rate of 7,040 cfs. This is also the deepest point on the Cowlitz River, with a gage stage of 34.28 ft. This river is monitored from 4 different streamgauging stations along the Cowlitz River, the highest being perched at an elevation of 1,053 ft, the Cowlitz River At Packwood.

River Summary: The Cowlitz River is a 105-mile-long river in southwestern Washington, originating from the glaciers of Mount Rainier National Park. Historically, the river was used for fishing and transportation by indigenous peoples. Today, it is a major source of hydroelectric power, with several major dams and reservoirs along its course, including Mayfield Dam and Riffe Lake. These dams have greatly affected the river's hydrology and the surrounding agricultural land by controlling flooding and providing irrigation. The Cowlitz River is also a popular recreational destination, with opportunities for fishing, boating, and hiking in the surrounding forests and mountains. The river is home to several species of salmon and steelhead, and efforts are being made to restore and protect their populations.

Last Updated	2023-06-01
Streamflow	17,100.0 cfs
Percent Normal	79.59%
Maximum	95,120.0 cfs 2020-02-07