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Project Location Lake Washington Shoreline Mercer Island, Washington Client City of Mercer Island Project Timeline 2003- Fall 2010

Existing lake line crossing sockeye spawning habitat.

Surveying nearshore habitat and documenting existing conditions.

Shoreline improvements create challenges for lake line replacement.

MERCER ISLAND LAKE LINE PERMITTING

The City of Mercer Island hired Confluence Environmental Company to provide continued regulatory compliance support, environmental review, permitting, and strategic input integral for the construction of a 2.5-mile, in-lake sewer line segment along the Lake Washington shoreline. Project complexities included providing reliable service to shoreline residents and working within time restraints for in-water work, while protecting resident properties, sensitive shoreline resources, and Endangered Species Act-listed species.

APPROACH

Confluence Environmental Company’s technically sound analyses, timely response, and excellent working relationships with the client, regulators, and contractors paved the way for a dynamic team able to respond to changing project concerns and constraints. Strong relationships with the following regulatory agencies were critical in allowing the city and their construction contractor flexibility in their construction approach:

U.S. Army Corps of Engineers Department of Ecology Department of Natural Resources Washington Department of Fish and Wildlife National Marine Fisheries Service U.S. Fish and Wildlife Service

CONCLUSIONS AND RECOMMENDATIONS

This project’s complicated construction schedule was met due to Confluence Environmental Company’s diligent communications, regulatory compliance strategy, clear and accurate analyses, thorough documentation, and responsive delivery of permits and modifications.