Agenda - Public Works Committee - 11/21/2023

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meander within the right-of-way, this will cause the edge of pavement to move several inches horizontally, and up to a foot from existing. Additionally, Staff found the existing roadway crown varies significantly throughout the project, with some areas having no crown or unanticipated super elevation. This project proposes to place a 3-percent crown throughout, which has become typical practice for rural reconstructions in Ramsey. The proposed section is 3.5-inches new bituminous pavement over 4 inches aggregate base, which will be made up of reclamation material. Driveway aprons will be going back approximately 8 feet to tie the driveways into the new pavement, materials are proposed to match existing. In general, the current swales along the streets within Halls Dover Acres are not proposed to be re -graded as part of this project. Staff is aware of standing water issues within the Radium Circle cul-de-sac, which are to be addressed. Additionally, the existingswale at the northwest quadrant of 157th Lane and Radium proposed Y Street has filled, completely covering the culvert. The soils are so well draining that water does not stand, however, Staff must do grading work in the ditch for the new culvert to be properly installed. Otherwise, due to the nature of street reconstruction, the in -slopes of the swales along the pavement will likely be disturbed approximately 3 to 5 feet off the edge of pavement. No changes to the current drainage patterns are proposed. The existing culverts crossing the streets are proposed to be removed and replaced, this is to ensure the culverts will last at least through the proposed 60-year design life of the street. A 12-inch trunk watermain is proposed to be extended from the existing end of line at Potassium Street, at the east edge of the Halls Dover Acresplat, along157th Lane to Nowthen Boulevard. From there, the watermain g will follow Nowthen Boulevard to Sunfish Lake Boulevard, and connect to an existing trunk watermain stub off of the Sodium Way cul-de-sac. In total the trunk watermain extension is approximately 2,100 lineal feet. Additionally, an 8-inch watermain line is proposed to extend down the Radium Street stub to the south, to serve future development to the south. Hydrants are proposed to be added at the comer of 157th Lane and Nowthen p Y p p Boulevard, 157th Lane and Radium Street, and at the end of the stub on Radium Street. Because Halls Dover Acres is not in the MUSA, the project does not propose to extend sanitary sewer to the subdivision. Staff has received some inquiries from residents if water and sewer will be available for hook-up during the project, though no formal requests have been made. Because the subdivision is not within the MUSA, sanitary sewer hook-ups would require a comprehensive plan amendment, and would delay the project beyond 2024 construction. There are some instances of properties within the City connecting to municipal water and not municipal sewer, staying on a private septic system, though it is not a common occurrence. Staff would like Public Works Committee input on the following watermain decisions as part of this project: • Does the Public Works Committee support the trunk watermain extension as part of this project? o If so, is the preference to extend only to Nowthen Boulevard, or complete the loop extension to Sodium Way off of Sunfish Lake Boulevard? o For reference, the corner of Nowthen Boulevard is approximately halfway along the 2,100 lineal foot route. • Does the Public Works Committee support connections to the trunk watermain? o If so, do you wish for Staff to be pro -active and reach out to the residents along the proposed trunk watermain route, to see if they are interested in connecting? o Staff supports connections to the watermain if residents are able to make immediate connections, but would not support placing services out for potential connections only. Preliminary Schedule Remaining • Council Approves Plans and Specifications / Authorizes Ad for Bids o January 9, 2024 • Staff Receives Bids