Combined Sewer System Long Term Control Plan Update

Page updated on Nov 12, 2018 at 10:21 AM

2017-2018 Long Term Control Plan Update 

As part of the 2017 Virginia Legislative Session, legislation was passed and signed by the Governor, that requires the City to remediate all of its combined sewer outfalls, requires that construction of future combined sewer infrastructure projects begin no later than July 1, 2023 and that construction of these projects be completed by July 1, 2025. The City, working together with Alexandria Renew Enterprises (AlexRenew), submitted a Long Term Control Plan Update to the Virginia Department of Environmental Quality (VDEQ) in May 2018. This Long Term Control Plan Update proposes the construction of a deep underground tunnel system to bring combined sewage to the AlexRenew wastewater treatment facility and will result in significant reductions in the number and volume of combined sewage discharged into City waterways.  As of July 1, 2018, VDEQ has approved the Long Term Control Plan Update, concurring that the proposed combined sewer facilities will bring Alexandria's combined sewer outfalls into compliance with the 2017 legislation. Additionally, the City has transferred ownership of the four combined sewer outfalls located in the City to AlexRenew, who will be responsible for implementing the Long Term Control Plan Update. Prior to VDEQ approval, implementation of the plan was referred to as the Wet Weather Program. In July 2018, the Program was renamed as RiverRenew: Investing in Healthier Waterways for Alexandria. 

For more information on the Long Term Control Plan Update, please contact Erin Bevis-Carver, P.E., Civil Engineer IV at 703.746.4154 or at More information about the RiverRenew program can be found here.

2016 Long Term Control Plan Update 

The City submitted the Long Term Control Plan Update to the Virginia Department of Environmental Quality (VDEQ) for approval on December 2, 2016. This document incorporated VDEQ's comments on the draft document that was submitted in August 2016. In addition, this final document incorporated City Council's action at the November 9, 2016 City Council Legislative Session to accelerate addressing the combined sewer outfall that discharges into Oronoco Bay. This acceleration called for the following with respect to the Oronoco Bay outfall:

  • Committing in the Long Term Control Plan Update to perform a feasibility study during the upcoming permit cycle (2018-2023), 14 years ahead of current draft plan.
  • Committing in the Long Term Control Plan Update to perform an assessment starting in 2026, six years ahead of current plan.
  • Enhanced funding in the CIP for sewer separation and green infrastructure.

City Council approved the option to accelerate addressing the Oronoco Bay outfall. Staff is in the process of updating the draft Long Term Control Plan Update consistent with this option, along with other minor edits on the draft report in response to comments received from Virginia Department of Environmental Quality.  More information can be found on the City Council Docket.

The City Council Public Hearing on the framework of the Long Term Control Plan Update took place on May 14, 2016. More information, including the presentation staff provided to Council, is available at the City's Dockets and Webcasts webpage. At the public hearing, City Council authorized staff to submit the Long Term Control Plan Update document to the Virginia Department of Environmental Quality (VDEQ). This document was submitted to VDEQ as a draft in August 2016 for their review and approval.

The following documents below provides a summary on the City's proposed Long Term Control Plan Update: 

The City is currently updating the 2016 Long Term Control Plan Update in order to meet the legislation passed by the General Assembly and signed by the Governor in April 2017. It is anticipated the City will complete its update of the Long Term Control Plan to meet the legislation and submit the revised plan to VDEQ on or around June 2018.