Agenda - Council - 03/28/2023 - Laserfiche WebLink

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CC Regular Session 7.1. Meeting Date: 03/28/2023 By: Bruce Westby, Engineering/Public Works Information Title: Adopt Resolution #23-061 Accepting Bids and Awarding Contract for Improvement Project #21-09, Centralized Water Treatment Plant Purpose/Background: Purpose: The purpose of this case is to adopt Resolution #23-061 accepting bids and awarding a Contract for construction of Improvement Project #21-09, Centralized Water Treatment Plant, to Magney Construction, Inc. in the amount of $31,528,500. Background: In early 2019, the Minnesota Department of Health detected manganese concentrations above recommended health guidelines in several of Ramsey's city wells. Since then, the following actions have been completed. • Letters outlining the new manganese issue and the City's short and long-term plans to address the issue were mailed on 5/15/2019 to approximately 5,600 Ramsey households. • A public meeting was conducted at City Hall on May 30, 2019, explaining manganese issues and addressing public concerns. • Wells #5, 6 and 7 have been exclusively utilized since as these wells have the lowest concentrations of manganese. Unfortunately, these three wells also have the largest concentrations of Iron leading to increased rusty water complaints. • Wells # 1, 31 4 and 8 have Manganese concentrations above MDH guidelines. These wells have only been utilized when water demand increases beyond the capabilities of wells #5, 6 and 7. • A Manganese hot line was established and Staff spoke to 88 concerned residents regarding Manganese and Iron in Ramsey's municipal water supply. • Several articles on this issue were published on Facebook and in the Ramsey Resident. • Staff collects and tests 15 random water samples monthly and publishes the test results on the City website showing Manganese concentrations from each of the sample sites. • SEH, Inc. completed a pilot plant study on Wells #3 and #4 to determine the best filtering process to remove Manganese and Iron from Ramsey's municipal water supply system. • SEH, Inc. completed a water treatment plant Feasibility Study. • SEH, Inc. prepared final plans and specifications for required raw and finished water trunk lines needed to serve the proposed water treatment plant. Final plans were advertised for bids but all bids were rejected as they significantly exceeded the engineer's estimate. • AE2S prepared final plans and specifications for the proposed WTP and administered the bid process. • AE2S will provide construction administration and inspection services upon award of project. The proposed City of Ramsey Water Treatment Plant (WTP) project generally consists of constructing a new 10 million gallons per day (MGD) gravity filtration WTP. In general; • Building construction consists of cast in place concrete and concrete masonry units. • Processes include a backwash reclaim basin, conventional dual -media gravity filters, a clear well, a reservoir, general process piping ranging in size from 3 to 30-inches, numerous valves, fittings, and appurtenances. • Chemical feed systems include chemical storage tanks, containment, and feed equipment for chlorine, permanganate, phosphate, hydrofluorosilicic acid, and polymer; high service pumps; general mechanical work including HVAC work, ductwork, drain, waste, and vent piping; and other mechanical equipment and