Agenda - Public Works Committee - 01/19/2021

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Public Works Committee 5.4. Meeting Date: 01/19/2021 By: Bruce Westby, Engineering/Public Works Title: Consider Recommending City Council Approval of Plans and Specifications and Authorization to Advertise for Bids for Riverdale Drive Reconstruction, Improvement Project #21-00 Purpose/Background: urpose: The purpose of this case is to consider recommending City Council approval of plans and specifications and authorization to advertise for bids for Riverdale Drive Reconstruction, Improvement Project #21-00. Background: City of Ramsey Improvement Project 21-00 proposes to reconstruct approximately 2,925 lineal feet (0.55 miles) of Riverdale Drive east of Feldspar Street. The project limits extend from Feldspar Street to a point approximately 200 feet west of Sunfish Lake Boulevard. This matches what Staff anticipates will be the terminus of the Ramsey Gateway Highway 10 improvements west of Sunfish Lake Boulevard. However, the final terminus will be determined after the preliminary design concept for the U.S. Highway 10/169 & Sunfish Lake Boulevard interchange is approved by the project partners, which is currently anticipated to occur in early February of 2021. On November 24, 2020, the Ramsey City Council accepted a proposal from Bolton & Menk, Inc. to provide design services for this project including collecting topographic survey data, completing geotechnical evaluations, preparing plans and specifications complying with Minnesota Department of Transportation (MnDOT) State Aid standards, providing required submittals to State Aid, and bidding services. The geotechnical evaluation results are not yet available but may be available by the time the January Public Works Committee meeting is held. If so, Staff will share the primary findings of the evaluation. Riverdale Drive is included in the City's Municipal State Aid (MSA) system, and is required to meet 10-ton pavement design strength. Municipal utilities, including water and sanitary sewer, exist within the project area. Sanitary sewer improvements are not proposed with the project as all sanitary sewer lines were cleaned and televised and the results verified that repairs are not immediately needed or anticipated during the design life of the improvements. Since repairs were made to several water service lines along this segment of Riverdale Drive in recent years, all water service lines are proposed to be inspected at the right of way to confirm each line is properly tied back to the trunk line to help prevent future leaks and repairs during the design life of the proposed improvements. The water supply system was also leak tested, which verified that repairs are not immediately needed or anticipated during the design life of the improvements. Storm sewer improvements are proposed with this project, including adding trunk storm sewer from Dolomite Street to the Mississippi River outlet pipe approximately 800-feet to the east to convey storm water runoff from 6710 Highway 10 NW to the Mississippi River. In addition, a structural pollution control device is proposed to be constructed on the north end of the same river outlet pipe to remove pollutants from the storm water runoff before discharging it into the river. The overall width of Riverdale Drive is proposed to be reduced 10-feet throughout the corridor, resulting in a total width of 34-feet from face -of -curb to face -of -curb. To accomplish this, two existing 6-foot wide on -street bike lanes on the west end of Riverdale Drive are proposed to be removed, as is the 10-foot wide parking lane along the north