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WATERSHED <br />SCIENCE & ENGINEERING <br />110 Pref+onlaine Place South, Sulle 5013 <br />Seattle, WA 98104 <br />206-521-3000 <br />Memorandum <br />Tkx Ted Perkins, FEMA Region X <br />Kevin Donnelly, STARR <br />Marts Cook, P.E., Kitlft County Department of Public Works <br />Fran: Shaina Sabatine P.E., Bob Elliot P.E., Jeff Johnson P.E. <br />Date: 7/21/2018 <br />Ra Review of Proposed FEMA DFIRM Flood Mapping in KdUlas County <br />Introduction <br />Watershed Science & Engineering (WSE) was retained by Kittitas County Department of Public <br />Works to review new floodplain delineations proposed by FEMA and their study contractor <br />STARR. The delineations are to be Included in a new County -Wide Digital Flood Insurance <br />Rate Map (DFIRM) that FEMA and STARR are preparing. <br />WSE reviewed modeled Zone A 100 -year floodplain delineations for 13 of 14 streams and six <br />reaches of the Yakima River (see list below). STARR was unable to provide the floodplain <br />delineation for Big Creek, therefore, WSE could not review it. <br />Big Creek <br />= Crystal Creek <br />• Little Creek <br />• Manastash Creek <br />= Quliomene Creek <br />• Roza Creek <br />• Skookumchuck Creek <br />• Squaw Creek <br />Taneum Creek <br />Tekison Creek <br />fl Umtanum Creek <br />Unnamed Tributary 5 <br />Unnamed Tributary 8 <br />Whiskey Dick Creek <br />Six reaches of Yakima River <br />WSE also reviewed a detailed Zone AE 100 -year floodplain delineation for the Yakima River <br />between the Cities of Easton and Cie Elum. <br />I <br />