Broken Arrow Municipal Authority
Meeting of: 06-02-2025
Title:
title
Approval of and authorization to execute a contract with URETEK USA, LLC. For the Tiger Hill Tank Void Fill project 2554480 pursuant State of Oklahoma Statewide Contract SW0721
End
Background:
The Tiger Hill Ground Water Storage Tanks reside on Tiger Hill at the southwest corner of the intersection of 9th Street (Lynn Lane) and Kenosha Street (71st). The storage tanks on top of the hill consist of (2) two one-million-gallon tanks and (1) one two-million-gallon tank. The easternmost tank, the 2-million-gallon tank, is currently undergoing a renovation project that consists of removal and replacement of the roof section, misc. upgrades and repairs, and internal and external coatings replacement.
During construction, it was found that under the base floor of the tank, due to tank leaks over the years, the supporting soils were undermined, and large void cavities are present. The flooring of the tank and foundations are outside of the scope of the rehabilitation project underway. In order to repair these void cavities without removal of the steel tank floors, an engineered solution has been developed by URETEK USA, LLC. to remediate the concern through injection of expansive polyurethane materials into the soil subgrade to fill the cavities.
This work shall consist of soil densification to strengthen base and sub-base soils under the steel tank floor, by furnishing and injecting expansive polyurethane material into the foundation soils beneath the floor through pre-opened holes (created by City/Contractor) with injection tubes inserted into holes (two rows zipper 4' center pattern) at locations marked when crew onsite with -4' depths while monitoring for movement at the surface.
Total area of injection shall be roughly 1,600 square feet of tank floor surface and shall consist of an estimated 7,500 pounds of void filling material. Due to the limited availability of investigation, the contract...
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