06-03-2019 Council Packet - Laserfiche WebLink

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WS – Item #3 WORK SESSION STAFF REPORT Work Session Item No. 3 Date: June 3, 2019 To: City Council From: Diane Hankee, City Engineer Re: Cedar Street Project Update Background On March 25, 2019 the City Council authorized the preparation of plans and specifications for the Elmcrest Avenue and Cedar Street Roadway Paving project. The project includes paving Elmcrest Avenue from Tart Lake Road to the south a distance of 2,300 feet, and Cedar Street from Otter Lake Road to the east a distance of 2,600 feet. The City also entered into a Joint Powers Agreement with the City Hugo for cost sharing of the project. The City of Hugo is funding the Elmcrest Avenue improvements and the City of Lino Lakes is funding the Cedar Street improvements. The estimated project cost for Cedar Street was $490,000. Funding for the project is planned through the street reconstruction fund in the amount of $247,500 and state aid funds in the amount of $242,500. The geotechnical analysis for the project was recently completed. The gravel section of the Cedar Street roadbed has underlying organics and peat for a good portion of the roadway. The depth of the organics or peat is up to 11 feet below the surface. Removing the organics and peat is beyond the original scope of the proposed grading project. It is estimated that removing all the underlying materials would cost an additional $300,000. Paving the gravel portion of the roadway as planned, while typical of existing roadways that are of 5-ton design, does leave the roadway prone to settlement and heaving. This will require additional maintenance overtime to mitigate the issue. Staff recommends adding spot subgrade replacement near the surface and additional gravel. The described additional measure is estimated to add $40,000 to the project. At the July 8, 2019 Council meeting staff will present the bids for Council consideration. Note the Minnesota Department of Transportation recently sent out a notice that construction costs have risen, and to expect anywhere from a 10-20% increase in cost. Requested Council Direction None required.