Agenda - Council - 05/25/2021 - Laserfiche WebLink

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Introduction The City of Ramsey proposes to construct a new 10 million gallons per day (MGD) iron and manganese Water Treatment Plant (WTP) near the City's new Public Works Facility following a traditional design -bid -build method. In 2019 the City selected SEH, Inc. to prepare a Feasibility Study for the purpose of selecting the preferred site, developing the preliminary design for the WTP including the selection of treatment processes, developing floor and site plans, developing building elevations, and preparing preliminary cost estimates. A copy of the final Feasibility Study is enclosed. The City is now soliciting proposals from qualified consultants to provide professional engineering services to complete the final design, to prepare final plans and specifications, to assist with bidding the plans and specifications, and to administer construction of the proposed WTP, pending future City Council approvals. Background The City of Ramsey obtains water for its municipal water supply system from the Tunnel City/Wonewoc (TCW) aquifer, formerly known as the Franconia -Ironton -Galesville (FIG) aquifer. Water is drawn from the TCW aquifer through eight (8) groundwater wells, seven (7) of which are currently utilized to provide potable water. The maximum capacity of the combined municipal wells is 10.9 million gallons per day (MGD). Two additional wells are proposed to be constructed in years 2023 and 2028, which will allow the City to supply water to all municipal water system users to the year 2040 based on projected growth. The City's groundwater supply wells have historically provided groundwater of good quality and in adequate quantity. However, in 2019 the Minnesota Department of Health informed the City that several of its groundwater wells are producing manganese concentrations exceeding the recommended Secondary Drinking Water Standards. The City does not currently treat its municipal water supply for manganese so as a short-term solution the City immediately started pumping water only from the three wells with the lowest concentrations of manganese to maintain manganese concentrations below the recommended Secondary Drinking Water Standards. Unfortunately, these wells also produce the highest concentrations of iron, which has resulted in increased complaints of rust -colored water and will damage system components over time. To plan for a long-term solution to reduce manganese and iron concentrations in the municipal water supply system, the City requested proposals from qualified consultants in 2019 to develop a GIS-based water model for the existing water supply system and to prepare a Feasibility Study analyzing the long-term viability of continuing to use the TCW aquifer as the City's sole water supply source, to identify all water treatment goals, to evaluate available treatment options, to select preferred treatment processes, to develop a preliminary layout for a centralized WTP, to select a preferred site for the WTP, to estimate construction and operational costs, to explore external funding sources for construction of the WTP, and to develop a public education and engagement plan. The City selected SEH, Inc. to prepare the final Feasibility Study, which is enclosed. The City is now soliciting proposals from qualified consultants to provide professional engineering services as outlined within this Request for Proposals (RFP). Questions regarding this RFP shall be directed to Utilities Superintendent John Nelson at 763-433-9861 or jnelson@cityoframsey.com. 3