EXH0759027698

PCHBPollution Control Hearings Board of the State of Washington

Hap 14 02 09:19p Rachael Paschal Osborn 5OS-328-8144 p.2 DRAFT AMENDMENTS TO: INITIAL WATERSHED ASSESSMENT WATER RESOURCES INVENTORY AREA 9 GREEN-DUWAMISH WATERSHED b.y_ Washington Department of Ecology Science Applications International Corporation Shapiro and Associates Taylor Associates Environmental Systems Research ln_Jtute January 20, 1995 These ameudments replace the text of Department of Ecology, Water Resources Program OFTR 95-01, as well as Figures 3, 4, 15, 16, 17, 18, 24 and 25. Figures and 27 from the original report have been removed In the revised version. Amendments prepared by: Tom Culhane and Jerry Liszak Washington Department of Ecology Northwest Regional Office Water Resources Program 3190 160th Avenue SE Bellevue, Washington 98008 November 22, 1995 AR 027698 Mar 14 02 09:49p Raohael Paschal Osborm 509-328-8144 p 33 TABLE OF CONTF.,N'_ - INTRODUCTION ....................................... 1 Initial Watex_ecl Assessments ........................... i The Green-DuwamishWatershed(WRIA) .................... l WATERSI_Y) DESCRIPTION .............................. 1 Area Description ................................... 1 Land Cover and LaudUse ............................. 2 Climate and PrecipitationTrends ......................... 3 HYDROGEOLOGY ..................................... 5 Hydrology ....................................... 5 Geology and GroundWater ............................ 5 GroundWater-SurfaceWaterInteraction..................... 8 GroundWater Status ................................. 10 WATER DEMAND ...................................... 12 History of the City of Tacoma Diversion and the Hansen Dam ....... 12 Water Rights and Claims .............................. 12 Soos Creek Subbuin ............................ 16 Newaulmm CReekSubbasin ........................ 16 Minimum Flows ................................... 17 Water Quality 18 : Sur£m_Watcr 18 GroundWater ................................ 19 Fisheries ........................................ 20 STRBA.M_...OWSTATUS .................................. 23 Objectives of Analysis ................................ 23 Flow Exceedence ................................... 23 Low Flows ....................................... 24 Int=Tn_tmionof StreamflowStatus ........................ 25 Percentage Analysis ............................. 26 Adjusted VolumetricAnalysis…
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