From
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Title
Change Order/Amendment No. 4 with Alliance Geotechnical Group in the amount of $52,173.88 for MacArthur Blvd Paving and Drainage Improvements material testing
Presenter
Romin Khavari, City Engineer
Recommended Action
Approve
Analysis
On April 21, 2015 a construction contract for the MacArthur Blvd Paving and Drainage improvements was approved by City Council. This project provides for the construction of 4,743 linear feet of 4-lane divided thoroughfare in MacArthur Blvd from IH-30 to north of the West fork of Trinity River to connect to the existing concrete roadway. The project also includes the construction of Two - 700 linear feet bridges over the Trinity River; 555 linear feet of 37’- wide new concrete roadway to the Land fill Road; construction of approximately 1400 linear feet of bypass channel across the existing Trinity River ox-bow to the west of MacArthur Blvd. to improve channel hydraulics and mitigate for the approximate 4 feet embankment fill required for the roadway.
This project provides for the installation of 31,200 square yards of 12" reinforced concrete pavement, 4,280 linear feet of various sizes storm sewer pipe, two- Tx54 concrete beam bridges (700 linear feet); 189,000 cubic yards of channel excavation, retaining walls and railings, street lighting and two traffic signals located at the Landfill Road and at the main Hanson Driveway intersections with MacArthur Blvd.
The City's three approved on-call material testing firms were allocated to this project due to the project complexity in the total amount of $247,720 (Alliance Geotechnical Group $164,938.30; REED Engineering $42,139.25; TEAM Consultants $40,642.25).
Staff is in agreement with Alliance Geotechnical for requesting an additional $52,173.88 due to additional material testing because of additional sub-grade fill and stabilization and added bridge embankment that was not part of their original estimate.
Total revised contract C14255 for material testin...
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