The Board unanimously approved the contracts at its meeting Saturday, funding the renovations to 10,000 linear feet of sewer in three areas: Ballston Pond, at Washington Blvd to Fairfax Drive, S. Eads Street and Army Navy Drive and S. Walter Reed Drive to Shirlington Road.
County staff recommended the new lining to add an estimated 50 years of life to the system, much of which was put in place before 1950s, and to protect the Chesapeake Bay watershed.
“This is a serious investment in critical infrastructure that we must make on a regular basis,” said County Board Chair Walter Tejada. “Maintaining our system will help to ensure that we can continue to serve Arlington’s growing population while protecting our environment.”
Alexandria and Fairfax County will also contribute funds to the system repairs. From the county press release:
Approximately 60 percent of the County’s sanitary sewer system was placed before the 1950s. As the system ages, pipes begin to corrode and cause sewer backups. The relining process will add another 50+ years to the existing infrastructure.
The contractor, AM-Liner East, Inc. will use the Cured-In-Place-Pipe (CIPP) relining method to rehabilitate this portion of the sewer system. This cost-effective, trenchless technology involves inserting a resin-impregnated felt liner similar to a sock into an existing sanitary sewer main and curing it using hot water or steam. Once complete, the new cured pipe renews the old sewer by providing a smooth channel.
As part of the Potomac Interceptor Project, Arlington County is evaluating and repairing manholes throughout the sewer system. These efforts will reduce the potential for water seeping into the sanitary sewer system, especially during storm events when excess water could overwhelm the water treatment plant and force a discharge of partially-treated sewage into Four Mile Run.