11-17-2021 Council Packet - Laserfiche WebLink

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Prepared by: Bolton & Menk, Inc. YORKTON RIDGE 2022 Street & Utility Improvements (Yorkton Ridge, Maple Ln - Jackson) St ǀ 0N1.125241 Page 3 the block-construction high capacity catch basin located in the cul-de-sac. Replacement of this structure and minor improvements to the other catch basins will ensure the system outlasts the pavement improvements proposed in this report. Proposed Improvements 1. Street Improvements Based on the pavement age and current distresses, the proposed street improvement for Yorkton Ridge is a full depth reclamation (FDR). A depiction of the proposed street and utility improvements is shown in Figure 3B in Appendix A. Current pavement distress patterns indicate surface-level wear but no significant deterioration of the roadway base. Full depth reclamation is a cost-effective rehabilitation method that grinds the top 10- 12 inches of existing bituminous pavement and aggregate base into a new aggregate that creates an improved foundation for 4 inches of new bituminous pavement. In addition to pavement reclamation, curb and gutter that is cracked, weathered, or heaved will be removed and replaced with new curb and gutter. This improves stormwater conveyance to catch basins and prevents the intrusion of stormwater into the roadway base. 2. Watermain Improvements The existing ductile iron watermain is in good condition and is proposed to be left in place. However, inspection and replacement of existing bolts at gate valves, hydrants, and mainline fittings is proposed. These features are typically the first to fail in the water system and proactive replacement of these bolts would limit the number of leaks and watermain breaks 3. Sanitary Sewer Improvements The existing sanitary sewer network is in good condition and is proposed to be left in place. Existing sanitary sewer manholes in the pavement will receive new castings and be adjusted to the new pavement elevation. New castings will also be fitted with exterior chimney seals to prevent inflow and infiltration (I/I). 4. Storm Sewer Improvements Overall, the existing storm sewer system is in good condition and proposed to be left in place. However, it is proposed that the high-capacity catch basin in the cul-de-sac be replaced with a precast structure that meets current City standards. Remaining catch basins will receive new castings and I/I barriers along with minor repairs to inverts and doghouses. 5. Water Quality Improvements Rehabilitation of Yorkton Ridge will not trigger Ramsey-Washington Metro Watershed District (RWMWD) stormwater improvements. However, residents will be given the opportunity during final design to opt into the City’s rain garden program. Any raingardens installed would be credited by the watershed towards other or future street improvement projects that trigger stormwater improvements. Exhibit 2 – Reclaimed Aggregate Base