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Otto G.Bonestroo,P.E. Howard A.Sanford,P.E. Agnes M.Ring.A.I.C.P. Miles B.Jensen.P.E. Bonestroo Robert W Rosen.PE' Keith A.Gordon.P.E. Philip J.Pyne,P.E. L.Phillip Gravel,P.E. Joseph C.Anderlik.P.E. Robert R.PfeRerle,P.E. Thomas W Peterson,P.E. Karen L.Wiemed,P.E. Rosen Marvin L.Sorvala,P.E. Richard W Foster,P.E. Michael C.Lynch.P.E. Gary D.Kristolltz,P.E. Richard E.Turner,P.E. David O.Loskota.P.E. James R.Maland,P.E. F Todd Foster P.E. Glenn R. ert C,Russek,A.I.A. Jerry .Pertzsch,RE. Keith R. Anderlik & Thomas E.Noyes.RE. JerrJerry A.Bourdon.RE. Scott D gaanek,P.E. Douglas J.Benoit,P.E. Robert G.Schunicht.P.E. Mark A.Hanson.P.E. Kenneth P.Anderson,P.E. Shawn D.Gustafson.P.E. Associates Susan M.Ebedin,C.P.A. Michael T.Rautmann.P.E. Mark R.Rolls.PE. Cecilio Olivier.P.E. *Senior Consultant Ted K.FW.P.E. Mark A.Seip,PE. Paul G.Heuer,P.E. Thomas R.Anderson,A.I.A. Gary W Morien,P.E. John P Gorder.P.E. Engineers & Architects Donald C.Burgardt,PE. Daniel J.Edgerton,P.E. Charles A.Erickson Thomas E.Angus.PE. A.Rick Schmidt,P.E. Leo M.Pawelsky Ismael Martinez.P.E. Philip J.Caswell,P.E. Harlan M.Olson October 13, 1993 Michael P Rau.PE. Mark D.Wallis,P.E. James F Engelhardt Mr. Lyle Oman, Building Official City of Orono Post Office Box 66 Crystal Bay, Minnesota 55323 Re: D. Brian Fulmer Sewer Plan File No. 139Gen Dear Lyle, We have reviewed the proposed sewer plan submitted for the D. Brian Fulmer property located at the southeast corner of U.S. Highway No. 12 and the Burlington Northern Railroad, in the Northeast Quarter of Section 32. We would recommend the following modifications. The pump should be designed for a Total Design Head (TDH) of 115 feet. This allows for the static head when MWCC's Maple Plain Lift Station is pumping (1079 - 967 = 112 feet) and approximately 3 feet of head losses due to the 2" forcemain, check valve and gate valve. The developer's engineer should check with the pump manufacturer (Aurora/Hydromatic Pumps, Inc.) to determine of the motor will be overloaded if it is pumping against a lesser head. For example, if the MWCC station is pumping at 1150 GPM or if it is not operating. The proposed lift station wet well depth should be a minimum of 2' below the inlet pipe and 3' below the discharge pipe as shown on the enclosed manufacturer's detail. The developer's engineer should check with the MWCC regarding their tap connection requirements and should complete an "Application and Permit for Connection to, or use of, Metropolitan Waste Control Commission Facilities". Please contact me at this office if you have any questions regarding this matter. Yours very truly, BONESTROO, ROSENE, ANDERLIK & ASSOCIATES, INC. Shawn D. Gustafson, P.E. cc: Ms. Jeanne A. Mabusth, Building and Zoning Administrator Enclosure 2335 West Highway 36 • St. Paul, MN 55113 • 612-636-4600