DESCRIPTION
This grant was used by the Walla Walla County Conservation District to develop a restoration plan for a 2-mile reach of upper Mill Creek near Walla Walla, Washington. Mill Creek is important habitat for Endangered Species Act-listed mid-Columbia steelhead and bull trout, as well as for re-introduced spring Chinook salmon. The value of the habitat is limited by high temperatures, substrate embeddedness, lack of large woody materials and channel confinement. The objectives of the restoration plan are to enhance in-stream habitat, reduce stream bank erosion, improve water quality and restore the channel to proper functioning condition.
The 2 mile long study reach lies within a 4 mile long area of interest, which begins approximately 0.5 miles west of the mouth of Blue Creek and ends approximately 0.7 miles north of the Washington/Oregon stateline. The project was to be done in two phases: project assessment and design (phase 1) and project construction (phase 2). This application was for phase 1 only. Specific activities were to 1) Assess stream conditions and develop an assessment report, 2) Develop a plan view map and conceptual designs of priority salmon restoration activities within the study reach (the plan view map was accompanied by a narrative detailing the issues within the project reach, a description of proposed projects and further assessment work to repair and mediate these issues, and justification for why each proposed activity is a priority), and 3) Develop a preliminary design, cost estimate, and design report for at least one identified priority project. A stakeholder work group participated in prioritization of proposed restoration activities and selection of project to move forward to preliminary design.