Agenda - Public Works Committee - 01/18/2022

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Site Grading Existing hydraulic modeling was reviewed to analyze storm water conditions for future development scenarios. The regional stormwater retention pond elevation will be used to determine the minimum elevations required for building pads in the area. The results of the modeling indicate the regional stormwater retention pond could reach a high water elevation of 866.5 during a too -year storm event. This should be considered a preliminary result at this time, as the actual pond size and shape could be revised based upon other studies occurring at the City. The Lower Rum River Watershed Management Organization requires the lowest floor elevation be a minimum of 2-feet above the 100-year high water level. Based on that requirement, the minimum building elevation should be 868.5. Figure 12 depicts the average existing lot elevations, the proposed minimum lot elevations required, and an approximate fill volume required to raise each of the sites to the minimum elevation. Each site requires an average of approximately 3-feet of fill to meet minimum elevations required. A new City park, located directly adjacent to Center Street NW, is in the planning stages at the City. The costs associated with importing fill for this parcel have been included in the alternate cost analysis section of this report. Street Lighting Street lighting will be in conformance with The COR Design Framework's Master Streetlight Plan. The locations and types of fixtures are depicted on the roadway geometrics Figures 14-26 in Appendix B of this report. The costs included for street lighting were derived from recent projects within the City of Ramsey and are considered to be reasonable costs associated with providing street and pedestrian lighting along the corridors. Costs include conduit, wiring and the actual light fixtures to be installed. The density of the lighting fixtures is similar to the level provided along Riverdale Drive, east of Armstrong Boulevard. The costs provided are considered conservative and may be reduced depending upon the types of developments proposed and the density of lighting required. Trails/Sidewalks Trails were previously constructed along the center of the Ramsey Parkway median east of Center Street. A bio-retention basin is proposed in the Ramsey Parkway median west of Center Street. 6-foot concrete walk is proposed on the north and south side of Ramsey Parkway to extend the pedestrian facilities to the west. A 10-foot concrete sidewalk is proposed along the west side of Center Street. All other roadways are proposed to include a 6-foot concrete sidewalk on either side of the road segment. Figures 14-29 in Appendix B show these layouts and typical sections. Landscaping The base project includes a very utilitarian approach to landscaping for the area. Bituminous trails, trees and lighting were included, but other features, such shrubs, decorative features and monuments are not included in the estimated project costs. Developers will be responsible to construct boulevard landscaping Prepared by: Bolton & Menk, Inc. ADDITIONAL PUBLIC INFRASTRUCTURE ANALYSIS The COR Analysis' R16.114924 Page 10