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1 � <br /> � <br /> within easements. <br /> • Hydrant leads should be ductile iron pipe. <br /> • The plan should identify the invert elevation of the sanitary sewer at the building. <br /> Lift Station <br /> • The valve vault is shown with only six feet of depth. This should be at least 7.5 feet deep to <br /> prevent freezing. Consider setting the sewer inlet elevation to this depth as well. <br /> • Please submit these lift station performance details: pump capacity, pump curve, the system <br /> curve, force main flow velocity, and planned flow and pumping information in gallons per minute. <br /> • The lift station design goal would be to provide a flexible system that can adjust to low initial <br /> flows and ensure that the sewage does not turn septic before pumping. <br /> Streets <br /> • A geotechnical report, R-value recommendation, and typicai roadway and parking lot section <br /> should be submitted for review. <br /> • A profile should be submitted for the driveway. Driveway or parking lot grades should not be <br /> less than 1%. <br /> • If the proposed curb is to be tipped out, it should be noted on the plans. <br /> • Plans should be submitted to MnDOT and Hennepin County for review and approval as the road <br /> ownership is currently in transition. <br /> • Plans have been submitted to the Fire Marshal for review. His comments are pending. <br /> Easements • <br /> • Drainage and utility easements should be provided along all ponding areas, drainage ways, <br /> wetiands and wetland bufFers. <br /> • Ten feet wide utility easements should be provided over proposed utilities. <br /> General <br /> • The proposed improvements will disturb more than one acre. This will require a permit from the <br /> MPCA. Final plans should include a detailed Storm Water Ppllution Prevention Plan (SWPPP) for <br /> review and approvaL <br /> • This project will disturb more than 100 CY of material triggering Orono's erosion control <br /> ordinance. City code requires that an erosion control financial security be submitted in the <br /> amount of 125% of the estimated cost to accomplish compliance with the SWPPP. The_ <br /> estimated cost for the project is $8,000 and the required security would then be $10,000. This <br /> includes silt fence re-installation, site seeding, and maintenance of catch basin sediment <br /> protection devices. � <br /> • Once the plans have been completed we will prepare an estimated cost for the site <br /> improvements as a basis for the necessary financial guarantee. <br /> If you have any questions, please call me at(651) 604-4894 or send an email to <br /> darren.amundsenCa�bonestroo.com <br /> Sincerely, <br /> � i. <br /> Darren Amundsen . <br /> Cc: Tom Kellogg <br /> Chris Mattson <br />