Humboldt Bay Watershed Management Area

Hydrologic Units: Humboldt Bay, Mad River, Redwood Creek, Eureka Plain

Description:The Humboldt Bay WMA encompasses waterbodies that drain to the Pacific Ocean from Humboldt Bay north to Redwood Creek.The major river systems in the WMA are the Mad River and Redwood Creek; other waterbodies include Humboldt Bay and Mad River Slough and coastal lagoons (Big, Stone, and Freshwater Lagoons) and streams (Elk and Little Rivers and Freshwater, Jacoby, and Maple Creeks).Redwood Creek, the Kelpbeds at Trinidad Head, and the Mad River are Critical Coastals Areas that occur in the WMA.

The Mad River has a long history of timber harvest on both USFS and private land.Gravel mining occurs in the lower portions of the watershed and grazing and agriculture occur in flat areas around the bay.Humboldt Bay is an important commercial and recreational shellfish area and provides the largest port between San Francisco and Coos Bay, Oregon.The majority of the population lives in the cities of Arcata and Eureka.Redwood Creek contains timberlands, coastal and upland agricultural lands, and in the lower portion of the basin, the Redwood National Park and Prairie Creek Redwoods State Park.The watershed is a model watershed in which government agencies, private landowners, non-profit organizations and the local communities cooperate to restore and protect water quality, watershed health, and the economic stability of the community of Orick.The watershed has a history of scientific studies and is home to pioneering work in watershed restoration and erosion control.

Salmonids: Chinook salmon (Oncorhynchus tshawytscha), coho salmon (Oncorhynchus kisutch) and steelhead trout (Oncorhynchus mykiss)