Broken Arrow City Council
Meeting of: 08-19-2025
Title:
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Ratification of the City Manager executed Professional Services contract with Velocity by Cogent for emergency sewer bypass services for the Haikey Creek trunk sewer line
End
Background:
On the morning of July 16th, City staff was notified of the presence of a large diameter sinkhole within the main property driveway of the KJM equestrian horse farm located at 4300 S. Butternut Ave. in Broken Arrow. Upon inspection of the sink hole when staff arrived onsite, it was confirmed that the sink hole was directly associated with the 48" diameter sewer trunk main that runs throughout the property north to south. Crews immediately mobilized to secure the area and stabilize the sinkhole.
48" SEWER TRUNK MAIN - DAMAGES
Once locates were active on the afternoon of the 17th, city staff were able to excavate the sinkhole location and get down to the sewer line roughly 17 feet in depth. It was determined that a 2' tall opening in the side of the pipe running roughly 6 feet in length was allowing soil to enter the trunk line. Flows were observed to be normal and relatively unobstructed from reviewing up and down stream manholes, but the size of the collapse was large enough that water immediately filled the excavation. Crews were able to plate the side of the pipe to cover the opening and shore it with an excavation box.
48" SEWER TRUNK LINE - REPAIRS
With the confirmation of the inspection that the current failure is the only issue to be resolved at this time, City forces are confident that inhouse forces can perform the repair utilizing the attached repair method. This repair method will involve placement of a cover pipe over the failure zone and concrete encase it. City staff have already mobilized additional equipment and shoring boxes rented to excavate to the depth of 17+ feet in depth and properly protect staff during the repairs. The formal repairs are scheduled for Thursday morning July 31st.
To perform ...
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