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Wastewater Treatment
The City of Murfreesboro is faced with several challenges for expanding and upgrading its wastewater infrastructure. A growing population, an aging collections system, and environmental limitations on surface water discharges have complicated the planning process for the next wastewater capacity expansion. In the last 10 years, population growth within the city limits and rise in demand for services inside the city's urban growth boundary have contributed to the increase in wastewater flow.

Sinking Creek Wastewater Treatment Plant
The Sinking Creek Wastewater Treatment Plant (WWTP) is owned and operated by the Murfreesboro Water and Sewer Department (MWSD), and is the only wastewater treatment facility serving the city. The plant is permitted for a surface water discharge of 16 million gallons per day (mgd) to the West Fork of the Stones River and is currently operating above 80% of its rated design capacity. Treated effluent from the Sinking Creek WWTP is also routed to the city's non-potable repurified effluent disposal system that meets beneficial reuse standards. The repurified water is either land applied at a dedicated disposal site (Jordan Farm) or conveyed to a growing list of reuse customers for site irrigation or other repurified water uses.

Wastewater Treatment Expansion & Effluent Disposal Alternatives
The city commissioned Hazen and Sawyer in June, 2010 to evaluate potential wastewater treatment expansion and effluent disposal alternatives. This Wastewater Treatment Capacity and Effluent Disposal Study evaluates population growth and distribution, regulatory requirements for effluent disposal, wastewater treatment technologies, effluent disposal options, centralized versus decentralized wastewater treatment alternatives, the collection system infrastructure, and capital and operation and maintenance costs. The evaluation in this study ultimately directed the development of a comprehensive set of wastewater treatment solutions to address near and long-term planning requirements.

Technical Memorandums
Seven technical memorandums provide the evaluation for each of the major parts of the study, as follows: