Agenda - Planning Commission - 01/04/2018

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Review File: Ramsey Elementary School Site Plan Application Engineering Review December 21, 2017 Page 3 of 6 Show the EOF location on the plan. Add the first floor elevation (FFE) to the plan. Wetlands 2& 3 do not have overland drainage routes. See discussion in stormwater plan review section below. Revise grading/ stormwater plan. Change name of local water authority to Lower Rum River Watershed Management Organization. Revise note on street cleaning: The contractor shall have a pickup type sweeper on site or available within 3 hours when notified by the City that sweeping is required. The City reserves the right to do the work and bill the developer's escrow if the work is not done in a timely manner. Water for dust control may not be obtained from hydrants. The City has a water fill station at Quicksilver St., south of 167th Avenue for water. C1.51 Turn off the contour and elevation information on this sheet. The pond outlines must be left on. Maximum hydrant spacing is 300 feet. This distance is measured around, not through, the building. The note about the drainage and utility easement for extending sanitary sewer must only appear on sheet C1.51. This easement must be recorded prior to approving final site plans for the project. Flared End Sections must extend to 2 feet above bottom of pond. The fine sands in Ramsey erode easily. The soils around the pond are primarily sand and will not retain water. The detail reference for the Outlet Control Structure must be shown. The Emergency Overflow may not be used to pass a portion of the 100 year storm. The pipes must be revised to pass all of the 100 year storm. The culverts under the main driveway, bus access and single family residence must be sized to pass the 100 year storm. The culvert sizes must be specified on the plans. The ditch size must be verified by survey from the pond outlet to Trott Brook to ensure flooding or erosion will not occur. The proposed 100 year elevation of the wetlands must be revised, the wetlands do not have an outlet at the elevation listed on the plans. Verify the sizes of CBI, CB2 & CB3. Our review indicates a 60 inch structure may work instead of the 72 inch. Screen the area behind the notes so lines are not visible.