10-12-2022 Council Packet - Laserfiche WebLink

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Prepared by: Bolton & Menk, Inc. SPRUCE STREET 2023 Street Improvements (Sunset Court, Sunrise Dr, Spruce St) ǀ 0N1.127995 Page 7 been modified in recent years to remove overland drainage and pipe more water to the Owasso Basin. City maintenance personnel have noted that the northern catch basin configure lends itself to period clogging and flooding during storm events or spring thaw. Bolton and Menk evaluated each of the storm sewer structures within the project area. The structures are precast and found to be in fair to good condition. Overall, the storm sewer system is expected to outlast the proposed pavement improvements. Proposed Improvements 1. Street Improvements Based upon the pavement age and distresses, the proposed street improvement for Spruce Street is a full depth reclamation (FDR). 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. Similarly, existing water services are proposed to be left in place. Bolted connections at gate valves, hydrants, and mainline fittings are typically the features that fail first within the water system. Inspection and replacement of bolts at these critical locations is a proactive way to limit leaks and breaks in the system beneath the new pavement. 3. Sanitary Sewer Improvements The existing sanitary sewer network is in good condition and is proposed to be left in place. 4. Storm Sewer Improvements The existing storm sewer system is in good condition and proposed to be left in place. However, a new manhole is proposed where the catch basins and culverts meet near the northern project extent. 5. Water Quality Improvements Rehabilitation of Spruce Street will not trigger Ramsey-Washington Metro Watershed District (RWMWD) stormwater improvements. However, business owners 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.