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Review File: St. Hilaire Property <br /> Preliminary Plat <br /> Engineering Review <br /> November 16, 2016 <br /> Page 2 of 3 <br /> 2. Weekly Erosion Control Inspection logs must be submitted to the City after each <br /> inspection. <br /> 3. A full record of the inspections must be submitted to the City before project closeout. <br /> 4. The City must approve the Notice of Termination before it is submitted. <br /> Preliminary Erosion and Sediment Control Plan Sheet C3.20: <br /> 1. Show RIPRAP at the flared end section from the street. <br /> Preliminary Grading and Drainage Plan Sheet C3.30: <br /> 1. Revise the lowest floor elevation for lots 5 — 10 to 872.5. This is two (2) feet above the <br /> 100 year water level of the adjacent wetlands as required by the Lower Rum River <br /> Watershed Management Organization (LRRWMO). <br /> 2. The trees that will be removed for grading should not be show on the final grading plan. <br /> Preliminary Utility Plan Sheet C4.10: <br /> 1. The storm sewer information for the pond outlet does not match the stormwater model. <br /> Provide updated information. <br /> 2. The connection to the existing sanitary manhole must be an inside drop. The City has <br /> updated their detail for an inside drop. <br /> 3. Utility installation will require dewatering. The final plans must show a location for <br /> discharge of the dewatering pipes. The downstream ditch must be checked for obstructions <br /> prior to starting dewatering. <br /> Details Sheet C6.10: <br /> 1. Add the proposed typical section, including pavement section detail. <br /> 2. Add sewer,water and storm sewer construction details. <br /> 3. Add a note "Streets must be cleaned within 3 hours after notification by City." <br /> A project manual which includes the bid form, contract and specifications must be submitted with <br /> the final plans. <br /> Stormwater Model: <br /> The model does not match the Preliminary Utility Plan as noted above. The City stormwater <br /> requirements match the LRRWMO requirements which are rate control for the 2, 10 and 100 year <br /> storms, infiltration of the first 1 inch of runoff from new impervious surfaces and water quality <br /> treatment to achieve 90% reduction of TSS and 60%reduction of TP in water leaving the site. <br /> The bottom of the proposed pond is less than 3 feet above the normal water level of the adjacent <br /> wetlands so infiltration on-site will not be credited. The developer will need to develop infiltration <br /> elsewhere on the site to treat an equivalent volume or pay into the infiltration mitigation fund <br />