Agenda - Planning Commission - 04/09/2015

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Review File: Harvest Estates Preliminary Plat Request Engineering Review Page 3 of 4 Stormwater Pollution Prevention Plan: Hydraulic Grade calculations must be submitted for the storm sewer system. A copy of the stormwater calculations provided to the LRRWMO for plan approval must be submitted to the City. The calculations submitted are missing CB 119-121 which are shown on the plans. The CB drainage map is missing labels. Staff offers the following general comments on all sheets: • Increase the contrast between exisiting and proposed conditions. • Add additional sheets to reduce the scale and improve readability. • Add Street Names to all Sheets. (City Staff will forward appropriate names based on County Grid System) • Add profile sheets for utilities. • Add dedicated sheet for removal and replacement of Existing Sewer and Water lines. • Separate Sewer and Water from Storm Sewer and Street sheet for this submittal. Staff offers the following sheet specific comments: C-3 — Existing FES at 152' Avenue will be in new street alignment. Plans must show relocation of this structure. Provide separate plan showing phasing for relocation of existing sewer and water lines along alignment of 152' Lane NW. Lots fronting Helium Street will require cutting into street for services. Add CG -1 — No Water can leave site along southwest edge adjacent to existing homes. Provide detail for overflow from new pond in south east corner of site to existing pond. Verify downstream route for overflow to Helium Street from existing pond. Verify the flood elevation and emergency overflow elevations for lots 11-21 in the table. Detail Sheets — Detail sheets were not included in the submittal. Use the City standard details with the notes as follows: • All sidewalks shall be 6 feet wide and 6 inches thick. • The MnDOT 5 sheet pad ramp details must be added to the plans. • Each pedestrian ramp must have a detailed diagram for each pedestrian ramp showing elevations, slopes and dome plate layout with radius (as needed). • Rock Construction Entrances are ineffective in Ramsey. Add the following text to the SWPPP and Grading Plan Notes: "A street sweeper must be available within 3 hours upon notice from the City that the streets need to be swept." • The typical street section shall have 6" Premium Topsoil. • All references to Class 5 shall read Class 5, Ramsey Modified. Gradation is shown on Ramsey Street Details. • Use Ramsey Detail STR-25 for connection to existing street and installing new services in Helium Street. Specifications were not submitted. These notes are required when the specifications are submitted.