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F VERGREEN ENGINEERING SERVICES INC. <br /> LAiJD �JSE PLANNING • CIViI �NGINEERING R. Alan Murray, P.E. <br /> August 13, 2004 2779p <br /> Ms. Jane Zimmerman <br /> City of Everett Public Works <br /> 3200 Cedar Street <br /> Everett, WA. 98201-4516 <br /> Re: MJR Development Silver Lake Medical <br /> Dear Ms. Zimmernan: <br /> This letter is written in response to your commer.ts regarding riser discharge "weir coefficienP' <br /> and"orifice coefficicnP'discrepancies: <br /> We corrected the two numbers in the riser input table of Watenvorks that you pointed out were <br /> reversed, re-computed the input table as is to see if the result would affect the restrictor/detention <br /> design. [t appears that the only changes were in the peak outfall of the 100 year 24-hour storm as <br /> well as the high water surface for the ]0 and 100 year storm events. These changes, however are <br /> within the acceptable parameters nfdesign. <br /> Plcase find attached the revised calculations as well as :letails of both the restricror manhole and <br /> vault cross section as an Addendum to the drainage report as they will be reflected and depicted <br /> in the subsequent and/or the final submittal. Additionally we are sending a copy of the <br /> manufacturer's printout that includes a capacity graph for the submersible effluent pump as <br />, requested. <br /> Sincerciy, <br /> Evergreen Engineering Services Inc. <br /> //-��!�.�". ` <br /> �� <br /> ! <br /> R. Alan Murray, P.E. <br /> Principal <br /> NAM/mpi:2779A/Rc�x�rt/2779M"LimnASl3W.doc `O � � � II IYI � D <br /> ll LI LS <br /> EfIC�OSUiCS <br /> AUG 1 61004 <br /> cc: Gordon Witcher � ��ITY OF EVER�j-?""' <br /> I Parmit ServiCes <br /> 30 <br /> � <br /> 8625 Evergreen Way, Suite 215 • Everetl, Washington 982D8-2620 • Phone:425•513-250D • Fax:425-355-1307 <br />