This project will include assessment, repair and rehabilitation of both the reservoir itself as well as replacement of approximately 500 linear feet of transmission main from the connection point to the reservoir, westerly to a location where the transmission main was replaced in 1984. In the fall of 2022, the City of Auburn’s disinfection by-product (DBP) running annual average exceeded the USEPA action level, requiring an immediate notification and plan to address trihalomethanes (THM’s) formation within Auburn’s distribution system. System operators immediately deployed flushing measures within the distribution system as an immediate measure to combat high levels of DBP’s. At the same time, staff began to consider longer term solutions that will further mitigate DBP’s and provide all Auburn customers with the highest quality water practical. The City has identified the high storage reservoir as a location to consider implementation of measures to further reduce the possibility of DBP formation as well as promote better mixing. The city is now interested in acquiring a water quality engineering consultant to assist in the engineering analysis, design development, and construction planning and implementation associated with providing better circulation of water and further removal/avoidance of DBP formation in our high storage reservoir. Due to the age and limited improvements to the existing 90-year-old reservoir, the city is also interested in the selected consultant to assist the city in a comprehensive analysis including but not limited to structural analysis, security/protection improvements, gate/flow device restoration, rehabilitation, and/or replacement. Lastly, it is assumed isolation of the City’s high storage reservoir will be required as result of this project. The city is interested in the firms understanding and experience with deployment of system pressure monitoring with the ability to link back to our SCADA system to assist operations with real-time pumping demands to match system pressures in the absence of a high storage equalizing tank. In addition to improving our water quality with reservoir improvements, the city is also interested in replacement of the last original section of 30” steel transmission main (locally fabricated) as it exits the reservoir and moves westerly towards Franklin Street Road in the Town of Sennett. In 2012 the City of Auburn invested in the replacement of this main from S. Lewis Street to Prospect Street along Franklin Street. Additionally, in 1984, a section of the original transmission main was replaced from Prospect Street to a location approximately 500 linear feet short of the Reservoir. This circa 1930 steel transmission main is experiencing several pin hole leaks and is in need of replacement. The city is interested in exploring multiple long-term solutions which could include replacement in kind or some type of lining solution.
