First European settlements established by fur traders at the mouth of the Columbia River.

California, Oregon, Washington, and Idaho begin to adopt the doctrine of prior appropriation to resolve disputes over water and riparian land use.

In response to declining salmon populations, the first salmon hatchery in the Columbia Basin is built on the Clackamas Rive

The Baranov catch equation is published, presenting the basic theory of fish population dynamics

The first Columbia River mainstem dam is completed, Bonneville Dam

U.S. Congress passes the Wilderness Act, Clean Air Act, Clean Water Act, National Environmental Policy Act, and Endangered Species Act.

27 distinct runs of salmon and steelhead, as well as Bull Trout and white sturgeon are listed as Threatened or Endangered in the western U.S.

The EPA issues management tools for states to achieve water quality standards under Section 303(d) of the Clean Water Act.

Mount Hood Environmental founded by Ian and Lauren Courter to provide scientific expertise and services to aquatic resource users and managers throughout the Pacific Northwest.

Mount Hood Environmental grows into a multidisciplinary company, conducting ecological analyses, focusing on fisheries and water quality.