Chehalis River

Total streamflow across the Chehalis River was last observed at 5,082 cfs, and is expected to yield approximately 10,080 acre-ft of water today; about 47% of normal. River levels are low and may signify a drought. Average streamflow for this time of year is 10,909 cfs, with recent peaks last observed on 2022-01-08 when daily discharge volume was observed at 112,610 cfs.

Maximum discharge along the river is currently at the Chehalis River At Porter reporting a streamflow rate of 2,450 cfs. However, the streamgauge with the highest stage along the river is the Chehalis River Near Doty with a gauge stage of 307.23 ft. This river is monitored from 4 different streamgauging stations along the Chehalis River, the highest being situated at an altitude of 324 ft, the Chehalis River Near Doty.

It has two main tributaries, the East Fork Chehalis and the West Fork Chehalis. The river was an important resource for Native American tribes such as the Chehalis and Chinook for centuries before European settlers arrived. Today, the Chehalis River is used for a variety of recreational activities such as fishing, kayaking, and camping. It is also used for agricultural purposes, with farms and pastureland located along its banks. The river is home to several reservoirs and dams, including the Mossyrock and Mayfield Dams, which provide hydroelectric power and flood control for surrounding communities. Despite these measures, the Chehalis River is prone to flooding during heavy rain events.