18 - Church Street Construction Contract Change Order - Concrete Paving

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Item No. 18 TO: Mayor & City Council John Godwin, City Manager FROM: Carla Easton, City Engineer SUBJECT: CHURCH STREET CONSTRUCTION CONTRACT CHANGE ORDER — CONCRETE PAVING DATE: January 19, 2019 BACKGROUND: In July 2018, a construction contract was awarded to Richard Drake Construction (RDC) in the amount of $2,922,117.65 for the reconstruction of Church Street from Hearne to Clarksville. The project consists of full depth asphalt pavement with concrete curb and gutter, sidewalks, and water and sewer utility improvements. The project bid documents included an alternate bid for a concrete pavement section. RDC's alternate bid for concrete was $23,974.17 more than the asphalt bid, and given the overall design and long term operations and maintenance considerations, staff recommended approval of the asphalt pavement section. The contract time for completion of the project is 300 calendar days, and time commenced October 1, 2018. STATUS OF ISSUE: Significant progress was made on the sewer installation from Hearne to Washington in October and November, despite wet weather. In early December, RDC began the first phases of pavement preparation with lime stabilization of the subgrade. This process typically takes 7 to 10 days, after which the first layers of asphalt can be applied. It has rained consistently each week since this process was started, leaving the subgrade saturated, and the road impassable. Until there is sufficient sunshine and wind to dry out the subgrade, the asphalt base cannot be installed. RDC has requested a contract time extension of 29 days due to wet weather from October through December. As an alternative to waiting for better weather, RDC has requested that we consider a change to concrete paving. This would allow them to proceed with paving operations without being so vulnerable to the wet weather conditions, which has the potential to get worse as we approach the spring months. This change would increase the original contract amount by $23,974.17. Representatives from RDC will be present at the January 28 council meeting to make their request to alter the current plan of work.