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� <br />�iversilied <br />July I l, 1995 <br />f i le No.: 0001-02-01 <br />Mr. Dan M:�ihias, P.G. <br />Associate Engineer � <br />City of Everett Public Works <br />Dear.Mr. Mathias: <br />j�GJ �15�,� 5 S <br />services <br />� <br />3304 252nd St. NE <br />Arlington, Washington 98223 <br />Telephone: (360) 435-0449 <br />Fax: (360) 435-9008 <br />Scotf Paper Log Yard Pump Station - <br />Sim•m Waler Calculations <br />As ,you will recall ihe City of Cveretl approved a peak discharge rate of 18.6-cfs/8350-gpm <br />for a pump station to discharge storm water from the. Scott Paper Company's Riverside Log <br />Yard into the 72" CSO. The pump station you are currently reviewing h:�s been designed and <br />will be constructed with the capaciry to operate at the a��aroved maximum discharge rate of <br />8350-gpm. However the pump station will initially operate at a maximum discharge rate of <br />4140-gpm which will handle the storm water runoff from ihe approaimately 50-acres of ihe <br />log yard which currently drain to ihe ditch/reservoir - this includes the chip milL At T future-.. <br />time when the remaining log yard stonn water system is rerouted to the west drainage ditch <br />two additional pumps will be added ro the pump station which will increase the pump station <br />discharge clpacity to a total of 8280-gpm. <br />Attached you will find ihe storm water calcula;ions used to design the pump station capacity. <br />If you have any question please feel free to call me at (360) 435-0449. <br />Div tied Gngineering Services, <br />���� �� <br />� <br />David L. Parshall, P.E. <br />Principal <br />