Dungeness Off-Channel Reservoir Design

Since the 30% design open house in December 2022, a LiDAR investigation revealed potential fault lines (lineaments) near the planned reservoir footprint. In order to ensure feasibility of design and location, a further seismic investigation is being conducted. In addition to this seismic investigation, the County has received feedback from residents concerned about the embankment height and amount of water above ground level in the 30% design. In response to these two factors, the 30% design is currently being revised, and current alternative designs can be viewed below.

Design Reports

Draft Preliminary Basis of Design

30% Design

Alternative Designs

Progress Reports

May 2023 Anchor QEA Progress Report

August 2023 Anchor QEA Progress Report

November 2023 Anchor QEA Progress Report

Environmental Reports

Old Sequim Dump Phase I Environmental Site Assessment

Old Sequim Dump Phase I Environmental Site Assessment Appendices

Old Sequim Dump Phase II Environmental Site Assessment