Laserfiche WebLink
► <br /> • nwa S�y- oz. Z <br /> 4229 76"SI NE.Swte 204 <br /> Marysville,WA 98270 • <br /> . ' • � � <br /> Phone(360)657d709 <br /> emielbQcomcast nel <br /> June 10, 2008 <br /> , ` <br /> Jane Zimmerman ��� � -�j '-` <br /> City of Eveiett �,'. ' � n � <br /> 3200 Cedar Street ) �� � �/1� L � 'p/y� � �I � � <br /> Everetl,WA 98201 � . �, � � n {-� <br /> Re Drainage Report-Flake Commercial#05-007 r('r � Y ; _���� I �� �� <br /> Site Address-2211 W. Casino Rd., Everett, WA 98204 f � � C � <br /> For David Flake ���� ���� �'�'� ,�'� <br /> � �� � �. � <br /> The 2 84 acre propeRy is located on the north side of W Casino Rd., - 1,660' east of t�e ���(�r I <br /> iniersection of W. Casino Rd and Airport Rd Site address is 2211 W. Casino Rd , Everett, ��J <br /> 98204 -��` � <br /> 1'v � 1 <br /> There are no ezisting structures on the property A wetland exi_'s . the NE portion of the site A I � I <br /> miligation plan tor the entire sile was prepared in 2005 bi the Jay Group. Grading has occurred ��) r <br /> on the site under a city-grading permit, and the new grade is reAecled in the construction plans / � <br /> submitted with this report. The site slopes to EasVNortheast with an averege slope of 7% l� ��'� <br /> Site soi�s are c�assifed as ���� � <br /> 5-Alderwood-Urban land complex, 2-8%sloF�;. (Type C Soiq (Entire Site) I �,�'`� <br /> Proposed development includes construction oi a 29,230 SF buildmg with parking, planter areas -!,� � I ��' <br /> and parking stalls Water, sanitary sewer and stormwater facilities will serve the site A , C <br /> 36'x112'x7' stormwater delenhon vault will be provided Stormwater treatment will be � I <br /> accomplished by Iwo slormwater tilter slructures of 4 cartridges each. Pre-lreatmenl will be <br /> accomplished by two CDS Slormwater Pretreatment Units as shown on the plans These units <br /> have a GULD designation for pretreatment. See altacnments <br /> Runoff �nalyses for the 2, 10, and 100 year - 24-hour duration storms were performed with <br /> Waterwnrks soflware and the results are included in this reeort Based on these calculations, a <br /> detenhon wet vault providing 11,040 CF of live storage will handle up lo the 100-year storm and <br /> meet detention requirements The water quality volume provided tor this facility equals 11,871 <br /> CF in the vault dead storage thal ezceeds lhe 4,834 CF required for the entire site. After <br /> detention and wa!er queGty treatment, flow from fhe project will discharge into the existing <br /> wetland whlch discharges northerly, crossing under !he Boemg freeway in a 4B" culvert wdh <br /> eventual dischaige into Puget Sound <br /> Please contact me at 360-657-4709 d you have any ques6ons. <br /> sincerely, F.ST �� �F <br /> 4'�/'� °' wtisH�44 � <br /> � i'�,. �' �o: �f <br /> . ': ! � C� � :i � sf � . � <br /> Ernest L Berg, P E � � �� , <br /> Berg Engineering � <br /> lS:IB y <br /> Attachments �°✓�p '�FQ�S�c�°� �� <br /> s � <br /> °4o�n1 <br /> Eapires 1/27/20f0 <br /> , �� ,. <br />