Cleanwater Nashville

Metro Water Services

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Additional updates

Lakewood improvement plans advance

Date added: 11-Aug-2015 09:32 AM

Lakewood improvement plans advanceClean Water OAP continues preparation for a major infrastructure renewal project in the Lakewood community. The project will include updating aged water and wastewater infrastructure and addressing longstanding problems of localized flooding in yards and roadways caused by stormwater.
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Broadway, Van Buren overflows eliminated

Date added: 11-Aug-2015 09:27 AM

Broadway, Van Buren overflows eliminatedMetro Nashville is making significant progress toward improving Cumberland River water quality, eliminating two downtown combined sewer overflow (CSO) points. Closing the Broadway and Van Buren CSO’s reduces the number of Davidson County overflow points by 25 percent and reduces the amount of contaminated stormwater and wastewater flowing directly into the Cumberland River.
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Clean Water Nashville OAP begins project work

Date added: 23-Feb-2017 02:28 PM

Clean Water Nashville OAP begins project workThe Clean Water Nashville Overflow Abatement Program initiated construction on the following major projects in the second quarter of 2012:

  • Expansion of storage capacity at the MWS Driftwood CSO Equalization Facility on Driftwood Street
  • Expansion and other improvements to the Dodson Chapel Pumping Station and Equalization Facility

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Music City Center features green roof

Date added: 11-Aug-2015 09:32 AM

Music City Center features green roofThe recently completed Music City Center is on track to be certified Silver Level LEED – Leadership in Energy and Environmental Design – by the U.S. Green Building Council.

One of the elements that will be considered during the certification process is the building’s green roof, designed to reduce the convention center’s overall energy usage.
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Remote-controlled cameras provide eyes for underground pipe repairs

The majority of Nashville’s sewer system lies hidden beneath streets and buried in easements. Since it cannot be readily observed, Metro Water Services (MWS) deploys a variety of technologies to assess the system’s condition.

One of those technologies, known as closed circuit television (CCTV) inspection, involves viewing the inside of a pipe via a remotely-operated camera in the sewer. The camera, typically installed on a small wheel-based chassis, records video as it travels down the pipe. The video can be viewed in real time by the operator or saved for future evaluation.

CCTV inspection is a fundamental tool utilized by MWS and the Clean Water Nashville Overflow Abatement Program (CWNOAP) to assess the condition of the sewer system, including:

  • Confirming pipe material, pipe size, and location of service laterals
  • Locating obstructions such as roots, grease, or debris that may require cleaning
  • Identifying evidence of groundwater infiltration or rainfall-derived infiltration and inflow that may need to be sealed to prevent sanitary sewer overflows
  • Locating structural defects within the pipe that may lead to future pipe failures
Mounted on a wheeled “rover” chassis (shown in Photo 1), closed circuit television (CCTV) cameras provide eyes that assist with maintenance and repairs of the underground sewer system. The camera identifies cracked and broken pipe sections (Photo 2) and locations of debris, grease, or roots (Photo 3) that may block the sewer. CCTV inspection can also identify locations of unwanted groundwater infiltration (Photo 4) that reduce available capacity. Occasionally wildlife, such as a mouse (Photo 5) or a snake (photo 6), enter the system through larger defects. With CCTV inspection, defects can be identified and repaired, restoring the pipe to its proper function (Photo 6)

Detecting problems via CCTV inspection is only half the job; the next step is to fix them. If an obstruction is identified, MWS can send remotely-operated cleaning equipment into the sewer to remove the potential blockage and restore the capacity of the sewer pipe.

If significant structural defects or leaks are observed, MWS has a high-tech solution for that part, too. As long as a pipe isn’t severely damaged, MWS can use a technology called cured-in-place pipe (CIPP) lining to rehabilitate the pipe through the installation of a seamless, tight-fitting, corrosion-resistant liner within the original host pipe.

This new lining improves pipe hydraulics, restores the pipe to a structurally sound condition, and addresses leaks into and out of the sewer.