EXH AR049788: Supplement Biological Assessment — Master Plan Update Improvements, Seattle-Tacoma International Airport

Notes

Supplement Biological Assessment prepared by Parametrix, Inc. (December 2000) for the Federal Aviation Administration and Port Of Seattle for reinitiation and initiation of ESA Section 7 consultation on STIA Master Plan Update Improvements. AR 049788. Document covers hydrologic impacts and mitigation for Miller Creek, Walker Creek, and Des Moines Creek watersheds, including stormwater detention facility design, flood peak flow frequency analysis, low stream flow changes, impervious area changes between 1994 baseline and 2006 future conditions, flow duration curves, and ESA pathways and indicators for listed salmon species. Prepared under project number 556-2912-001(48).

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