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Public Health > Environmental Health > Septic Systems > Watersheds

The Gibbons & Salmon Creek Watersheds

Framing the eastern fringe of Washougal, Washington, Gibbons Creek is an important resource within the slopes of the Columbia River valley. In the upper watershed, the creek and its tributaries - which includes Campen Creek - flows through relatively steep, incised valleys down the northern slope of the Columbia River Gorge. The creek then reaches the floor of the valley, near Evergreen Highway crossing.

Salmon Creek originates in the forested hills east of Hockinson and flows west past farms and rural homes. It continues through the heart of fast-growing Hazel Dell and Felida and ends at Lake River, which flows into the Columbia River.

A variety of human activities threaten the health of Salmon and Gibbons Creeks. A growing population compounds the problem. Some sources of pollution include:

  • Failing septic systems
  • Pet and livestock waste
  • Pesticides and fertilizers from residential and agricultural use
  • Oils and other toxins from motor vehicles

    Aquatic life is threatened by polluted storm water runoff from fields, roads, roofs, and parking lots, and by soil that erodes into the stream. As a result, Salmon and Gibbons Creeks currently exceed state and federal standards for water temperature, turbidity, and coliform bacteria.

    More than 90% of septic systems along Salmon and Gibbons Creek are in good working condition. The few that are failing however, create big problems for water quality in the creek. They can also affect people's health. By volunteering to get their septic systems inspected, area residents can confirm that their system is working well, or take early action if needed.

    Maintaining a properly functioning septic system is an important responsibility of every homeowner.

    Following a similar project for Salmon Creek, a septic system clean-up mission for Gibbons Creek is set to occur.

    Receive a free survey of your septic system.

    Learn more about the Gibbons Creek Total Maximum Daily Load Implementation (TMDL) project.

    Find out what you can do to improve the health of threatened watersheds.

    Key Contacts:
  • Clark County Public Health: Director John Wiesman
    Street Address: 1601 East Fourth Plain Boulevard, Vancouver, WA 98661
    Mailing Address: P.O. Box 9825, Vancouver, WA 98666-8825
    Main phone: (360) 397-8000
    TTY: (360) 397-8407
    E-mail: Public.Health@clark.wa.gov

    Responsible Elected Official: Board of Clark County Commissioners

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