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\� <br />K <br />Kegel & Associates Inc. <br />March 17. 1980 <br />Engineerin� Department <br />City of �verett <br />City Service Center <br />3200 Cedar Street <br />Everett, Washington 98201 <br />Attn: Dan Mathias <br />Re: Drainage Plan for Dave 0'Connor -- 1lolly Dr. & Dorn Ave. <br />Our File �lo. 7830 <br />Dan: <br />Enclosed herewith find revised plan reflecting increased detention <br />volume as resulting from your request to utilize a 10 year pre- <br />development storm and 25 year storage requirements. <br />Also included is a detail of the relationship between the stream <br />bed and the finished floor elevation. <br />Please note that contours fal,l to the South and [ast, therefore, it <br />is unlikely that flooding would impact the subject property. <br />It is our opinion that p��oper construction of the rock wall and the <br />five foot vertical separatiun between the st�eam bed and the finished <br />floor elevation should provide adequate protection against any flood- <br />ing that may occur in this area. <br />We seek your concurrence in this matter. <br />Sincerely, <br />Jack N. M ver. E.I.T. <br />Y.egel & ssociates, Inc. <br />JPJM/ ph <br />Enclosure <br />FFCrr�, �-� <br />MAR 1 7 1980 <br />EN6INEERS • SURVEYORS • PLANNERS <br />9C00 EVERGREEN 1YAV (U.S.991. EVERETT, WASHINGTON 98204 • PHONE (206) 353�1119/775•5424 <br />