Agenda - Public Works Committee - 02/21/2023

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4. PROPOSED IMPROVEMENTS 4.1 Street and Stormwater Improvements 4.1.1 Street Improvements 146th Avenue, 147th Avenue and Ferret Street are proposed to be reconstructed with bituminous pavement and concrete curb and gutter. The proposed surface improvements are shown on Figures 1 and 2 in Appendix A. Street Design: 146t1i Avenue, 147th Avenue, and Ferret Street are currently urban commercial streets with bituminous curb and pavement, 40 feet wide from face -of -curb to face -of -curb. The proposed cul-de-sac is 100-feet in diameter from back -of -curb to back -of -curb. Existing and proposed traffic counts are low for typical commercial streets. All street segments are proposed to be reconstructed at their current width. A typical section for the proposed pavement reconstruction improvements is shown in Figure 3 in Appendix A. This Feasibility Report proposes to reconstruct the existing bituminous pavement section using the Full Depth Reclamation (FDR) process. This process generally involves reclaiming the entire existing bituminous pavement section, along with the underlying aggregate base material. The reclaim material will then be salvaged and stockpiled to install the proposed public utilities. Four and one-half inches of bituminous pavement is proposed to be placed on top of a minimum of 8 inches of aggregate base/reclaim material. This pavement section generally meets the City of Ramsey's standard pavement design for commercial/employment district streets. The proposed improvements should have a service life of at least 30-years, assuming maintenance such as overlays, crack sealing and seal coating is routinely performed. 4.1.2 Storm Server Improvements Storm sewer is proposed to be added for street drainage with catch basins being added to convey water off the road and into a proposed ponding and drainage ditches as shown on Figures 1 and 2 in Appendix A. 4.1.3 Other Considerations Roadway and Pond Options: The proposed pond size and location was evaluated, 2 options are presented: • Option 1 — Regional Pond o This option proposes a regional pond sized appropriately to accept stormwater runoff from the AARA parcels (PID 29-32-25-14-0005 and 29- 32-25-14-0015) and parcels south of 147t1i Avenue and east of Ferret Street. o Right-of-way and or easement acquisition at 8100 146th Ave NW will be required to accommodate the regional pond. Feasibility Report Update HI -10 Ramsey Improvements City of Ramsey Project No. 18-02 Page 7