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Ms. Traci Tomas <br />August 9, 2017 <br />Page 3 <br /> <br /> S:\1Planning Commission\2017\08282017\MEMO - Development plan review - City Engineer.docx <br /> <br />14. Incorporate 40% voids for all biofiltration basin models. <br /> <br />15. Label pond side slopes. <br /> <br />16. Label NWL and HWL for all structural BMPs. <br /> <br />17. Provide casting and structure size information. <br /> <br /> <br />Sanitary Sewer and Watermain <br /> <br />1. Label lighting fixture locations on final plan set. <br /> <br />2. Connection to the existing sanitary manhole to be core drilled and filled with a watertight boot. <br /> <br />3. MH-1 should include an outside drop. <br /> <br />4. The sanitary minimum velocity is 2 fps. <br /> <br />5. Where are the sanitary and water service connections to the building? The locations and <br />elevations will be critical to ensure service can be met to the lower units and underground parking <br />facilities. <br /> <br />6. Label the valves or cleanouts on final plan set. <br /> <br />7. Ensure separation distances between all utilities. <br /> <br />8. Hydrants shall be located to provide coverage of the building pad within a radius of 250 feet. <br /> <br />9. Ensure all hydrants are equipped with the proper nozzle treads per the City Standard <br />Specifications. <br /> <br />10. Provide 4” thickness of insulation at watermain and storm sewer crossings where storm sewer <br />and drainage structures provide less than 3.5 feet of cover over the watermain. <br /> <br />11. Verify an 8” watermain as proposed will provide adequate fire flow and pressure to serve the <br />number of units and building elevations being proposed. <br /> <br />12. Watermain material – the plans call out PVC, city standard specification is ductile iron pipe with <br />poly wrap. <br /> <br />13. Water and sanitary sewer connections to buildings must conform to the plumbing code as <br />interpreted by the local building officials. <br /> <br />14. The applicant shall include a drain tile system behind the curbs to convey sump pump discharge <br />from the units as detailed in the City Standard Specifications. <br /> <br />Please contact me if you have any questions or need any additional information from engineering staff. <br /> <br />Sincerely, <br /> <br />WSB & Associates, Inc. <br /> <br /> <br />Todd Hubmer <br />City Engineer <br />207