Broken Arrow Municipal Authority
Meeting of: 05-03-2016
To: Chairman and Authority Members
From: Department of Engineering and Construction
Title:
title
Approval of and authorization to execute an Agreement for Professional Consultant Services with Professional Engineering Consultants, P.A., for Design of County Line Trunk Sewer Improvements from Jasper Street to Washington Street (Project No. S.1609)
End
Background:
Portions of the County Line Trunk Sewer, which was constructed in 1984, have deteriorated over time due to the hydrogen sulfide gases vented off from the wastewater within the system and is need of repairs or replacement. Recent wet weather has exposed a number of line failures resulting in sanitary sewer overflows (SSO's), commonly referred to as bypasses, which in turn have created sinkholes, thereby, necessitating emergency repairs. The most problematic portion of the line is from it junction with the Broken Arrow Creek Trunk Sewer, approximately one (1) mile north of the Lynn Lane Wastewater Treatment Plant (LLWWTP) just north of Jasper Street (E. 131st Street South), to about New Orleans Street (East 101st Street South).
In the 1980's, when the line as installed, the material choices available for large diameter sanitary sewer lines were very limited. The line is constructed of concrete cylinder pipe, which is very susceptible to corrosion from hydrogen sulfide gas emitted by sewer flows. Staff has been reluctant to schedule wholesale rehabilitation of the line until the Wastewater Master Plan recommendations for line replacement sizes and types were received. The draft Plan was submitted in April and is now under review. Staff has requested addition of the engineering and construction on the Oklahoma Water Resources Board (OWRB) priority list. A request for a Clean Water State Revolving Fund (CWSRF) loan is being prepared.
In an effort to expedite the r...
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