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I ' I/ <br /> 5 <br /> . � � � �� �� f � <br /> , � y.,(.�.; <br /> ,` / � <br /> Reid, Middleton � Associotes, Inc. <br /> Engineers • Surveyors • Plon rs <br /> �� '' �, �G o �S �� <br /> April 12, 1988 � � �1 <br /> File No. 21-88-004-002-02 L ppc�?S�/'C�21, <br /> �� �`"e . 2 <br /> �'�-�'�� , <br /> Mr, David Gent /� <br /> Operations Manage[ � � l�� <br /> Wilder Paving Pcoducts <br /> 3315 - 15th Stseet <br /> Everett, Washin9ton 98201 � <br /> Subject: GraBing <br /> Plan and Associated Services ! ��� <br /> The Greenshield's Tracts, Everett <br /> Deac Mr. Gent: <br /> We have naw coripleted Task B.2.b. (Determine Concluit Flaas) foc the subject <br /> project. We have completed this usin9 the "Fational" approach which is <br /> satisfactory for the City of �ecett tequirements in this area. This was done <br /> for both 10-year ancl 25-year storm events. As you c7n see this does not make <br /> much differene and an 18-inch pipe would appear to tie satisfactory in both <br /> cases. I have enclosed a copy of the upstream drainage basin map which shows <br />' � - � various terzain types in the basin. This map is at approximately 1" = 50' <br />�� scale. <br /> I <br /> ' I have also enclosed a copy of the upstream basin analysis and an on-site <br /> analysis for existin9 conditions. <br /> We aze not proceeding on further tasks until we receive your directive. <br /> Very truly yours, � <br /> gEID, MIDDLEIC)N & ASSOCZAT�, II`1C• <br /> G ���� <br /> Joseph A. Rurrus, P.E• <br /> Ptincipal Engineer <br /> JAR:bb:ENGR:WIliDIIt 4 <br /> RECEIVED APP 1 3 1983 <br /> 121 5ch Avenue North, Suire 't00, Edmonds, Woshingron 98020 (206) 775-�d�� II <br />