Agenda - Public Works Committee - 03/18/2025

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5.1. Public Works Committee Meeting Date: 03/18/2025 Primary Strategic Plan Initiative: Address infrastructure needs. Title: Consider Recommending City Council Approving Plans and Specifications and Authorizing Advertisement for Bids for Dickenson's Mississippi Estates Street Reconstructions, Improvement Project #25-04 Purpose/Background: Purpose: The purpose of this case is to consider recommending City Council approving plans and specifications and authorizing advertisement for bids for Dickenson's Mississippi Estates Street Reconstructions, Improvement Project #25-04. Background: The 2024 — 2033 Capital Improvement Program (CIP) identifies the streets within the Dickenson's Mississippi Estate subdivision for street reconstruction in 2025. A street segment summary for this project is attached to this case. Existing Conditions This project proposes to reconstruct Tungsten Street between Riverdale Drive and Rivlyn Avenue, as well as Rivlyn Avenue between the western cul-de-sac and the eastern edge of plat. The streets are 31-foot wide urban section with concrete curb and gutter. Tungsten Street has commercial use on both sides, while Rivlyn Avenue is residential, with single-family homes. Though only marked by signage rather than pavement markings or off- street trail facilities, the streets are part of the Mississippi River Trail Bikeway. The streets total 0.26 miles in length. Municipal sewer, watermain and storm sewer exist within the project area. The watermain and sanitary sewer were installed in 1990, making it 35 years old when the street reconstruction will occur, and 95 years old by the end of the streets 60-year design life. During the Ramsey Gateway Highway 10 Improvements, it was found that the watermain gate valves were built with mild steel bolts rather than stainless steel as is used today. This has resulted in premature eroding of the valve bolts, which in recent years have separated when the valves are exercised requiring emergency repairs to replace the valves and repair the streets. The sanitary sewer and storm sewer were televised to determine the condition of the pipes and structures. The sanitary sewer was found to be in good condition. The storm sewer under the streets was found to be in good condition. The storm sewer outlet pipe to the Mississippi River was found to have some minor damage, which is not proposed to be addressed with this street reconstruction project but will be addressed under a separate project at a later time. The CIP includes addressing stormwater runoff from 6140 Highway 10 as part of this project. As part of this project, an analysis of stormwater runoff from 6140 Highway 10 was performed, and a connection to the existing City storm sewer system as well as on -site stormwater management is required to address the runoff. Project History • May 28, 2024, the Ramsey City Council adopted Resolution #24-138, ordering requests for proposals for topographic surveys, geotechnical evaluations and utility testing for 2025 capital improvement program projects.