Agenda - Council - 10/09/2018 - Laserfiche WebLink

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4. PROPOSED IMPROVEMENTS 4.1 Street and Stormwater Improvements 4.1.1 Street Improvements Stanhope Terrace is proposed to be reconstructed with bituminous pavement and concrete curb and gutter, which will better facilitate drainage over time. Numerous streets exist throughout the City with bituminous curbing and almost all of them are deteriorating more rapidly than streets with concrete curb and gutter due to their inability to rapidly convey drainage off of the pavement surface, particularly along edges of streets. The proposed surface improvements are shown on Figure 1 in Appendix A. Street Desin: Ute Street, 154th Lane, and 153rd Court are currently urban residential streets with bituminous curb and pavement, 30-feet wide from back -of -curb to back -of -curb. The cul-de-sacs on Ute Street and 153rd Court are 100-feet in diameter from back -of -curb to back -of -curb. Existing and proposed traffic counts are consistent with typical residential streets. All street segments are proposed to be reconstructed at their current width. A typical section for the proposed pavement reconstruction improvements is shown in Figure 2 in Appendix A. City staff is proposing a pavement section design of 1.5 inches bituminous wear course, 2 inches bituminous base course, and 4 inches of aggregate base composed of full depth reclamation material. This pavement section would be constructed over the existing subgrade after it is reshaped and compacted. 4.1.2 Storm Sewer Improvements The existing storm sewer system is in good condition. Catch basin castings will require new rings and will be regrouted. No stormwater treatment improvements are required for this project since the street is proposed to be reconstructed at its current width. 4.1.3 Geotechnical Considerations Braun Intertec, Inc. (Braun) completed a Geotechnical Exploration and Engineering Review including five (5) soil borings spaced at approximate 600-foot intervals along Ute Street and 154th Lane, and one (1) soil boring in each cul-de-sac. The locations of the borings are shown in the Boring Location Map in the Appendix of Braun's report, attached in Appendix C. Braun recommends completing a 6 - 8 inch deep reclamation of the existing bituminous pavement and placing 6-inches of aggregate base class 5 or reclaim material, and 3.5-inches of new bituminous pavement. City staff is in close agreement and proposes completing a full -depth reclamation of the existing pavement by placing 4-inches of aggregate base class 5 or reclaim material, and 3.5-inches of new bituminous pavement. Feasibility Report Stanhope Terrace Reconstructions City of Ramsey Project No. 18-00 Page 8