Public Works and Environmental Services

CONTACT INFORMATION: Our 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

Wolftrap Creek at Wolftrap Road & 1098DP Basin Retrofit

Project #: SD-000031-288

Project Update: June 15, 2026

The County is in the process of completing the assessment of the stream valley and evaluating design alternatives.  A community meeting is scheduled for June 30.  


Extreme bank erosion with significant undercutting, exposed roots, channel incision, and large deposition.
Extreme bank erosion with significant undercutting, exposed roots, channel incision, and large deposition.

Project Background

The stream stabilization and restoration project was initially scoped in 2017 and was authorized for design for fiscal year 2025 under the stormwater capital projects work plan. The project corridor extends approximately 1,600 linear feet and traverses approximately seven HOA properties and residential areas within the Difficult Run Watershed in Vienna. 

Previous stream assessments identified general channel instability, streambank erosion, sediment transport, localized head cuts, degraded riparian conditions, and limited floodplain connectivity throughout the project corridor. The assessments also documented infrastructure concerns, including sanitary sewer crossings adjacent to and beneath the stream channel and an exposed sanitary sewer manhole within the project area. 

Project Description

Restoration of approximately 1,600 linear feet of stream channel and one stormwater detention basin located in the Providence Magisterial District and within the Difficult Run Watershed in Vienna.  The project extends approximately 1,600 linear feet from the stormwater detention basin, 1098DP, across multiple private properties until it reaches Wolftrap Road. The stream assessment has identified channel instability, stream bank erosion, sediment transport, and limited floodplain connectivity throughout the project area.

The primary goals of this project are to:

  • Restore stream stability.
  • Improve water quality.
  • Reduce sediment loading.
  • Enhance habitat.
  • Address public safety and provide long-term protection of surrounding infrastructure.

Project Location

The stream restoration project is located to the east of Bryd Road and Hunt Valley Drive and to the west of Lord Fairfax Road. The stream restoration starts at the south end of Kentsdale Lane and extends south to Wolftrap Road.

Wolftrap creek retrofit map

Project Phase

Design Phase. 

Project Benefits

  • Improve channel instability and reduce streambank erosion.
  • Restore floodplain connectivity and stormwater conveyance.
  • Reduce sediment and nutrient transport downstream.
  • Improve water quality and aquatic habitat conditions.
  • Protect nearby structures and private property.

Evidence of active sediment transport and ongoing channel instability.

Evidence of active sediment transport and ongoing channel instability.

Exposed sanitary sewer manhole within the stream channel because of channel incision and bank erosion.

Exposed sanitary sewer manhole within the stream channel because of channel incision and bank erosion.

Documents and Notices

We plan to host a public meeting on Summer 2026 to inform the community about the project purpose, anticipated benefits, and design approach.

What to Expect

As the project advances through the design development process, public meetings will be scheduled to update the community on the design and to receive feedback.

Project Cost and Funding Source(s)

The design of Wolftrap Creek at Wolftrap Road & 1098DP Basin Retrofit project is funded for $665,000.00. Construction funding is dependent upon future budget availability and allocations. Stormwater projects are funded through the county Stormwater Service District.

Contact

For more information, please email the Project Manager Ruqaya Al Ameri, Stormwater Planning Division, Department of Public Works and Environmental Services, or call -703-324-5500, TTY 711

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