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1-inch diameter copper pipe to individual residences. Curb stops and boxes will be installed at the ROW where the new service pipe connects to the existing service pipe. Beyond James Avenue, watermain improvements will include replacement of select leaky gate valves and boxes and adjusting the remaining gate valve boxes within the project pavement areas to final grade to provide a smooth/drivable street surface in conjunction with the street resurfacing portion of the project. Some damaged valve box tops may require replacement. See Figures 2 and 3 in Appendix A for the proposed utility improvements. D. Storm Sewer Based on the existing storm sewer age, size, and performance, the existing storm sewer was found to be in generally good condition. Storm sewer improvements will include rehabilitations at select locations including CIPP lining, minor pipe replacement, structure replacements, rings and casting replacement, re -mudding of structures/inverts, drainageway channel re -grading, rip rap replacement/installation, and storm sewer apron improvements. Some of the work identified will be taking place outside of the roadway area in easements that include behind houses. Access to these areas may be difficult and will necessitate tree removal and restoration of temporary access impacts, including private landscaping facilities in some areas. Stormwater quality improvements will also be implemented to help remove sediments and pollutant loads to the downstream system. This will include the replacement of the last storm sewer structure in the street prior to its outfall into a stormwater pond or drainageway. This structure will be replaced with a new structure that includes a sump and SAFL Baffle to capture sediment from continuing downstream. This will allow city maintenance staff to easily access the structure and vac out accumulated sediment. Work on the storm sewer catch basin structures within the existing concrete curb and gutter will additionally require the spot replacement of the adjacent concrete curb and gutter surrounding the catch basin castings. Proposed storm sewer improvements on James Avenue include the full replacement of the storm sewer to accommodate the watermain replacement. Additional storm sewer improvements are proposed along the trail adjacent to 4242 Norma Avenue based on a preliminary design provided by city staff. This work is intended to capture sediment south/southeast of the property and route it to the storm sewer system as opposed to following the current overland drainage path that generates stormwater issues at the property. This work will require the removal of several trees in the area to construct the improvements. Beyond the work identified above, the remaining storm sewer manhole castings within the pavement of the project areas will be adjusted to final grade to provide a smooth/drivable street surface in conjunction with the street resurfacing portion of the project. Some damaged castings may require replacement. This work will include the replacement of all concrete adjustment rings for each applicable manhole structure within the pavement limits. See Figures 2 and 3 in Appendix A for the proposed utility improvements. E. Stormwater Ponds The two stormwater ponds identified by city staff to have collected significant sediment accumulation over time which has reduced their working capacities are proposed to be dredged as part of the project. The proposed pond dredging will reestablish the originally designed pond volume. The first pond is located between McClung Drive and Briarknoll Circle, just north of the bituminous trail. The second pond is located south of Colleen Avenue, just west of Hamline Avenue North, however, only a portion of this pond is within Prepared by: Bolton & Menk, Inc. PROPOSED IMPROVEMENTS 2024 PMP Street & Utility Improvements I OT1.130168 Page 6