Broken Arrow Municipal Authority
Meeting of: 12-05-2023
Title:
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Approval of and authorization to execute Amendment No. 2 to the Professional Consultant Agreement with RJN Group, Inc. for Wagoner County Trunk Line Phase I Rehabilitation (Project No. S. 22020)
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Background:
The Wagoner County Trunk Sewer Line was installed in the 1980s and runs from near New Orleans and 23rd Street up to north of Kenosha and 65th St. This line is made of mostly concrete pipe and receives flow from the Old Adams Creek Lift station then conveys this flow down to the County Line Trunk Sewer. In recent years it has become clear that there is some degree of degradation in this sewer line due to age, pipe material, and receiving sewage that has been pumped multiple times. This degradation has caused several sinkholes along the sewer line. RJN Group, Inc. (RJN) was hired in October of 2021 to perform a Rapid Inspection Tool investigation on this trunk line. The investigation confirmed the degradation of the sewer line and broke down the line into different priorities for replacement. This project will be for replacing the Priority 1 sections of sewer line, which is approximately 4,850 linear feet (LF) of 24-inch and 27-inch reinforced concrete pipe (RCP). This section runs through the Broken Arrow Events Park and continues upstream. The replacement of this section of sewer line will decrease the amount of maintenance required on the line and improve system functionality.
During design of this project, it was determined that due to the new amphitheater development, a study to determine if the Trunk line should be upsized from the original plans is needed and additional assistance of RJN Group, INC is required for executing studies and updating the plan set as well as acquiring any new permits for the project. For this reason, the Engineering and Construction Department negotiated Amendment No. 2 to the Professional Consultant Short Agreement with RJN Group, INC, to conduct flow s...
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