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Feasibility Report 2024 Street Improvement Project City of St. Anthony Village WSB Project No. 023088-000 Page 5 4. Proposed Improvements 4.1 Sanitary Sewer The proposed sanitary sewer improvements include adjusting existing manhole castings with chimney seals to reduce inflow and infiltration of storm water into the manholes. It is also proposed to repair damaged sanitary sewer as necessary following internal inspection (televising). 4.2 Water Main Water main improvements are not proposed to be included with this improvement project. Existing gate valves will be adjusted to the new roadway surface. 4.3 Storm Sewer The storm structures that have heaved will be evaluated in final design to determine if any additional actions are needed during construction to reduce future issues. In addition, an additional boulevard catch basin will be installed along 35th Avenue Northeast to address an isolated drainage issue behind the curb. 4.4 Streets Mill and overlay improvements are a cost-effective strategy to extend the life cycle of the roadway. Mill and overlay improvements are most effective when scheduled within 15 years of original construction. Improvements along all bituminous mill and overlay roadways will include a 2-inch mill to remove wear course. A new 2-inch wear course will then be paved over the entire width of each street to extend the pavement life of the roadway. There will be an additional ¼ -inch of pavement that extends above the toe of the curb to keep the pavement above the curb as the road settles over time. The proposed typical section is shown on Figure 3 in Appendix A. To allow the contractor to complete the mill and overlay improvements timely and safely, roads will be closed to through traffic (open to residents). Improvements along 31st Avenue from St. Anthony Boulevard to Rankin Road were originally proposed to include complete roadway reconstruction including replacement of existing sanitary sewer and watermain. However, the City’s CIP recently prioritized the mill and overlay program to ensure the roadways receive the mill and overlay improvements timely to avoid a more extensive pavement replacement project. 31st Avenue is proposed to receive a thin mill and overlay to extend the pavement life until the roadway can be reconstructed in the next few years. 4.5 Miscellaneous Concrete Improvements The City will be replacing deficient concrete walk within the various parks throughout the City with the 2024 Street Improvement Project. Replacements will be identified with final design and include improvements identified in the 2023 Facilities Assessment Report and Parks Evaluation Report. Costs associated with these improvements are not included in this report and will be identified during final design. 70