Contractors to Bid on Final Closure Cap Construction
Contractors interested in bidding on the final cap construction contract walked across the existing reinforced geomembrane liner at the Maxey Flats Disposal Site in Hillsboro, Ky., as part of last week’s mandatory pre-bid meetings.
They will compete in a sealed bid process for the contract to construct the engineer-designed final cap. As stated in the official solicitation on the Finance Cabinet’s State Planroom website, this final closure cap project will entail the construction of “a composite final cover system over the facility using on-site soils and geosynthetic materials and other ancillary components. “
Principal Engineer Mark Day, P.E., of URS Corporation (below) helped lead the pre-bid site tours and responded to contractor inquiries on project and design specifications. The final cap design contract was awarded to URS Corporation, an engineering firm, in January 2013.
Also in the background of the above photo, notice the absence of sump risers protruding from the surface. Protrusions had to be cut off below the surface earlier this year and properly prepared for the final cap.
Historical efforts and preparation for the final cap involved the purchase of 725 acres, in addition to the original 280-acre site, bringing the total acreage up to approximately 1,005 acres. The acreage purchase creates a buffer zone around the site and will serve as on-site areas from which soil can be borrowed for the final cap, keeping the excavation and hauling activities on-site.
Complete terms and conditions for bidding are outlined in the official solicitation on the Finance Cabinet’s State Planroom website. According to the schedule, bids will be submitted by contractors in a sealed envelope by Sept. 4, 2014, at 1 p.m. EDT.
From left to right (below) Principal Engineer Mark Day, P.E., of URS, Commonwealth Project Coordinator Shawn Cecil, P.G., of the Kentucky Department for Environmental Protection, Chris Brown, P.E., of URS, and Hossein Mehdipour of the Finance Cabinet addressed contractors’ inquiries at the Aug. 6 pre-bid meeting.
Day (below) discussed haul road construction possibilities and project considerations with contractors during the onsite tour. The site is positioned on a flat-topped ridge, is bound by steep slopes to the west, east and south, and is approximately 350 feet above the adjacent valley bottoms, the source of the borrow soil for the final cap. The selected contractor will be constructing transport roads from the valley bottoms to the site as part of the project.
Upon leaving the restricted area (the fenced area with the liner), a survey is required for radioactive contaminants. In the photo below, site staff member Jeff Webb surveyed a pre-bid meeting participant’s shoe soles. At the Maxey Flats Disposal Site, staff take careful measures to ensure the health and safety of visitors, and take pride in their responsibilities of protecting public health and the environment.
More information on the Maxey Flats Disposal Site can be found here on the Kentucky Division of Waste Management’s website. You may also contact Shawn Cecil, P.G., project coordinator for the Department for Environmental Protection at Shawn.Cecil@ky.gov or 502-564-6716, ext. 4754.
Click here to view all previous Naturally Connected posts on Maxey Flats.