Public Works and Environmental Services

CONTACT INFORMATION: Our administrative offices are open to the public. Appointments are preferred. Please call or email 8 a.m. - 4:30 p.m., Monday – Friday
703-324-5800 TTY 711
12000 Government Center Parkway
Suite 449 Fairfax, VA 22035
Carey Needham
Director, Capital Facilities

Indian Run Gravity Sewer Replacement Project

Project Number: WW-0000028-002-F

map - Indian Run Gravity Sewer Replacement
Overview map showing the proposed work.


Project Update: January 29, 2024

Contractor installed 8" C900 pipe between existing MH 82 and new MH3. Started test pitting at MH2 for existing water line in order to install MH2. Contractor added second crew to expedite the contract work. The Contractor is actively working on Birch Lane installing an 8-inch Sanitary Sewer pipe from MH3 to MH2, Started Maintenance of Traffic work on Columbia Road. Installed MH2 and 8 in pipe from MH 3 to MH 2 at the Birch Lane Cul De Sac and backfilled it. Started working on laterals for Lot 2 and Lot 3. Removed shoring box at MH 2.

The contractor started working on the Columbia Road and started installing 8-inch Sanitary Sewer pipe between MH 182 and 183.

Mid Feb 2024 contractor to start stream restoration.

Project Background

The purpose of this project is to relocate an existing gravity sewer pipe that crosses the Indian Run stream. The gravity sewer in question is partially exposed (above ground level) in certain segments, and fully exposed as it crosses the stream. Furthermore, a sewer manhole along the stream bank (manhole # 419) has been undermined by the adjacent stream. The exposed pipe segments and the undermined manhole present a potential environmental hazard. The intent of this project is to remove this sewer crossing and relocate the sewer flows via alternative routes.

Project Description

The project involves the installation of new sewer mains near the Columbia Road and Montgomery Street intersection and crossing the Birch Lane cul-de-sac. Further, roughly 640 feet of existing gravity sewer will be abandoned or removed.

Project Location

The project is in Annandale adjacent to and in the Indian Run Stream Valley Park. Road closures are expected near the Columbia Road and Montgomery Street intersection.

Project Phase

The project is in construction phase.

Project Benefits

The benefits of the project are:

  • Improve sewer system reliability in the neighborhood.
  • Prevent costly future emergency repairs.
  • Reduce future risk of sanitary sewer overflows.
  • Reduce risks to public health and the environment.


Construction activity is expected to begin in early 2023 and be substantially completed in Winter 2023.

Project Cost and Funding Source

Construction of the Indian Run Gravity Sewer Replacement Project is estimated to be between $1.5 million and $2.5 million. Wastewater construction projects are funded through the County’s Capital Improvement Program.


For more information, please email, Mujahid Ali, P.E., AVS; Sr. Project Manager within the Wastewater Design and Construction Division, Capital Facilities, Department of Public Works and Environmental Services, or call 703-324-5111, TTY 711.

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