PCHB Doc 01-133: Declaration of Edward O’Brien — ACC v. Ecology and Port Of Seattle

Notes

Declaration of Edward O’Brien, Washington Department of Ecology Water Quality Program employee since 1979, filed in PCHB No. 01-133 (Airport Communities Coalition v. State of Washington Department of Ecology and Port Of Seattle). O’Brien describes his familiarity with the 1992 Stormwater Management Manual for Puget Sound, the 1999 Draft Manual, and the final September 27, 2001 western Washington stormwater manual. Declares that the 1998 King County Surface Water Design Manual addresses hydrologic impacts of impervious surface development including Horton overland flow, peak flow increases, reduced groundwater recharge, and decreased summer base flows. Relevant statutes and manuals include NPDES stormwater permits, King County Design Manual Section 3.1.1, and Washington stormwater management standards.

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