Cleanwater Nashville

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Additional updates

Washington CSO Control Facility goes online

Date added: 11-Aug-2015 09:35 AM

Washington CSO Control Facility goes onlineA major combined sewer facility providing optimization for wet weather storage, screening and control of floatables and solids went online in April of this year. In addition to providing treatment, the facility dramatically reduces the number of overflows at the Washington outfall, and reduces the volume of overflows by approximately 90 percent annually.

Constructed at a cost of approximately $17 million, it was operationally complete in time to meet the Consent Decree milestone.
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Update on the Metro Nashville Consent Decree Program

Date added: 11-Aug-2015 09:34 AM

Update on the Metro Nashville Consent Decree ProgramOn August 6, 2012, Scott Potter and Ron Taylor of Metro Water Services provided an update on the Clean Water Nashville Overflow Abatement Program program to the Metro Council. This presentation addressed the status of the Consent Decree and planned projects included in the Long Term Control Plan for Metro Nashville Combined Sewer Overflows (Long Term Control Plan update) and the Corrective Action Plan/Engineering Report.Click here to download a copy of the presentation.
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2015 highlights include completion of major projects

Clean Water Nashville completed numerous projects in 2015 that upgraded Metro Nashville wastewater infrastructure.

DODSON CHAPEL PIPE IMPROVEMENTS PROJECT, located in Metro Council Districts 11 and 14, was completed in December 2015.

This project to upgrade system capacity included installation of approximately 3,280 linear feet of 48-inch and 30-inch diameter gravity sewer and 240 feet of 72-inch diameter casing that was placed under Old Hickory Boulevard.

The project reflects the careful planning required to update the system within a vibrant urban environment. In this case, replacing sewer underneath Old Hickory Boulevard meant conducting the work while maintaining traffic flow through the busy corridor. Project teams used jackhammers and other hand-held tools to dig a tunnel underneath Old Hickory. As digging out occurred, steel plate rings were installed to form a tunnel for the 48- inch diameter sewer pipe.
The Dodson Chapel Pipe Improvements Project is the second major Clean Water Nashville project completed in Hermitage. The Dodson Chapel Equalization Tank and Wastewater Pumping Station Expansion was completed in April 2014.

MILL CREEK/OPRYLAND EQUALIZATION FACILITY, PHASE II, increased storage capacity with the addition of a 19-million gallon, pre-stressed concrete wastewater storage tank adjacent to an existing 15-million gallon tank. The project was completed in April 2015.

Located in Metro Council District 19, the storage tanks are utilized when sewage flows exceed the capacity of the existing sewer system. The peak flows are stored until the flows in the system recede, and the stored volume can be conveyed through the system to treatment.

Expanding capacity of this facility will reduce sanitary sewer overflows.

COWAN RIVERSIDE REHABILITATION AREA 1—JONES AVENUE was conducted to renew aging infrastructure and to address downstream overflows by reducing the amount of rainfall that can enter the system through defects.

This project, located in an expansive area that includes Metro Council Districts 5 and 8, consisted of the evaluation of approximately 50,000 linear feet of gravity sewer, associated manholes and services laterals within Metro right-of-way and easements. The resulting construction project included the rehabilitation of approximately 40,000 linear feet of 8- to 15-inch diameter gravity sewer, 230 manholes and 630 service connections.