Public Works and Environmental Services

CONTACT INFORMATION: Our administrative offices are open 8 a.m. – 4:30 p.m., Mon - Fri
703-324-5500 TTY 711
12000 Government Center Parkway
Suite 449, Fairfax, Va 22035
Joni Calmbacher
Director, Stormwater Planning

Tripps Run at Barrett Road Flood Mitigation Project

Project Number: SD-000032-069

Project Update: June 12, 2024

The 35% design submittal for this project was received on Tuesday, June 11, 2024, and is being reviewed by county staff. A public engagement meeting will be scheduled in July 2024 to provide updates to the community.

Project Background

The project is the result of a study completed in December 2020. The study involved the investigation of potential flood mitigation measures in an area of historic flooding along Tripps Run near Barrett Road. The study assessed and evaluated four flood mitigation project scenarios. These scenarios included grading and stream enhancements within county properties and easements as well as acquiring properties for additional grading opportunities. The selected scenario moved forward for design in summer 2023.

The Final Report can be found here: Final Report | Appendix A | Appendix B | Appendix C | Appendix D

Project Description and Location

The project area is located along Tripps Run between Annandale Road and Sleepy Hollow Park in the Bel Air neighborhood.

Map - Tripps Run at Barrett Road Flood Mitigation project
The project area is shown in the red outline.


The following benefits may be realized:

  • Reduction in property flooding
  • Reduction in residential structure flooding
  • Creation of an environmental corridor with a passive recreational area for the community
  • Improved floodplain connectivity
  • Stream stability, flow diversity and possibly water quality improvements


The design of the project began in summer 2023.

Project Cost and Funding Source

Funding through the Department of Conservation and Recreation (DCR) Community Flood Preparedness Fund (CFPF) in the amount of $8,985,200 has been awarded. A Grant Agreement from the Virginia Resources Authority (VRA) was authorized in April 2023 for the design and construction of the Tripps Run at Barrett Road Flood Mitigation Project.


For more information, please email Joni Calmbacher, Stormwater Planning Division, Department of Public Works and Environmental Services, or call 703-324-2183, TTY 711.

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