Agenda - Public Works Committee - 01/18/2022

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Storm Water Management Center Street serves as an east/west watershed boundary within The COR. Portions of The COR located east of Center Street are routed to a pond located near Ramsey Boulevard and the BNSF railroad tracks. Portions of The COR located west of Center Street (north of Sunwood Drive) are routed to a regional storm water retention pond located north of Ramsey Parkway, just west of Center Street. The outlet from the regional stormwater retention pond is proposed to consist of storm water piping from the pond to an existing storm sewer system located in Sunwood Drive at Yolite Street. Some exceptions to the general flow patterns are anticipated, and each development will need to be reviewed to determine the most logical storm water routing on a case -by --case basis. A storm sewer system was previously constructed in Sunwood Drive and Center Street. The system directed roadway runoff to regional ponds located to the east and south of Center Street. Approximately 400 feet of Sunwood Drive located west of Center Street flows to the east. The remainder of Sunwood Drive adjacent to Center Street flows to the south in a pipe located at the Yolite Street alignment. The majority of the drainage for the area west of Center Street currently flow north from Sunwood Drive to the vacant parcels, wetlands and depressions west of Center Street. The storm water then infiltrates, or flows overland to a currently plugged outlet pipe near the Sunwood Drive and Yolite Street intersection. The Veterans Drive and Peridot Street extension area currently drains to the existing wet pond located at the south east corner of The COR. The existing wet pond and proposed infiltration basin are shown in Figures 6 and 7 in Appendix B. VI. ROADWAY CLASSIFICATIONS AND DESIGN CONSIDERATIONS This analysis includes examining the feasibility of constructing roadways and other supporting public infrastructure in The COR. Roadways included in the study are as follows: • Ramsey Parkway - Center Street NW to Sunwood Drive NW, • Center Street NW - from the existing developed section north to Bunker Lake Boulevard, • Xenolith Street NW - Sunwood Drive to Ramsey Parkway, • Yolite Street NW - Sunwood Drive to Ramsey Parkway, • Bunker Lake Boulevard — Armstrong Boulevard to Ramsey Boulevard - full 4-lane divided roadway, • Veterans Drive NW - Rhinestone Street to Ramsey Boulevard, • Peridot Street NW - Sunwood Drive to Veterans Drive. Figures 2 and 3 in Appendix B depict the roadway segments and geometrics included in this analysis. Street Hierarchy The COR Design Framework plan establishes a street hierarchy designation for roadways within The COR (see Appendix A). The 2030 Comprehensive Plan establishes road classifications to create a safe and efficient roadway network throughout the City (see Appendix A). The following table presents a summary of roadway classifications. Prepared by: Bolton & Menk, Inc. ROADWAY CLASSIFICATIONS AND DESIGN CONSIDERATIONS The COR Analysis 1 R16.114924 Page 6