11-17-2021 Council Packet - Laserfiche WebLink

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Prepared by: Bolton & Menk, Inc. MAPLE LANE – JACKSON STREET 2022 Street & Utility Improvements (Yorkton Ridge, Maple Ln - Jackson) St ǀ 0N1.125241 Page 5 passes through an additional storm manhole before outletting to a detention pond north of the cul-de-sac. All stormwater east of the high point along Jackson Street is conveyed south via curb and gutter to another storm sewer system. City maintenance personnel have noted that there are no known deficiencies with the storm sewer system. 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, following minor rehabilitation to existing structures, 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 Maple Lane - Jackson Street is a full depth reclamation (FDR). A depiction of the proposed street and utility improvements is shown in Figure 3A 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. Similarly, existing water services are proposed to be left in place. However, pavement rehabilitation provides an advantageous opportunity to perform preventative maintenance on the system before the new pavement is constructed. 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. In conjunction with the pavement rehabilitation, each sanitary sewer structure within the pavement will receive a new casting and adjustment to the new pavement elevation. New castings will also be fitted with exterior chimney seals to prevent I/I. Any necessary mud repairs to benches and inverts will also be performed at this time. 4. Storm Sewer Improvements The existing storm sewer system is generally in good condition and is proposed to be left in place. Routine repairs to catch basins will repair deteriorating doghouses and Exhibit 4 – Fitting Bolt Replacement