NHC Comments on Port Of Seattle’s New Low Streamflow Analysis

Notes

Northwest Hydraulic Consultants (NHC), on behalf of the Airport Communities Coalition (ACC), submitted technical comments to the Washington State Department of Ecology regarding the Port of Seattle’s July 23, 2001 Low Streamflow Analysis related to the proposed third runway at Sea-Tac Airport. The letter identifies the analysis as an incomplete draft document with missing sections, inconsistencies with the Stormwater Management Plan, and failure to address low-flow impacts from other airport activities. Specific concerns include unaccounted transit losses, conflicting reserve storage facility documentation, and inadequate evaluation of impacts to Walker and Des Moines Creeks.

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