Project Overview
Montgomery Parks is preparing to construct an outfall stabilization and tributary restoration project along four storm drain outfall channels that flow into Paint Branch. Site access will occur via the trailhead at Tamarack Neighborhood Park, 13205 Collingwood Terrace, Colesville, and along Paint Branch Trail.
The four channels are identified as Northcrest Outfall, Peacock Outfall, Lemontree Tributary, and Collingwood Outfall. The primary goals of the outfall projects are to stabilize the eroding outfalls to decrease sediment accumulation along the Paint Branch Floodplain, halt tree loss along the channels, protect storm drain and trail infrastructure, protect a historic millrace, and improve water quality via the prevention of erosion. Along the Lemontree Tributary, the goals are to decrease erosion, improve habitat in the stream channel, and protect adjacent trail infrastructure. The project is intended to meet the requirements of the National Pollutant Discharge Elimination System (NPDES) Municipal Separate Storm Sewer System (MS4) permit issued to Montgomery County by the Maryland Department of the Environment (MDE) and reduce pollutant loads below the Chesapeake Bay Total Maximum Daily Load (TMDL).
Paint Branch Trail will be closed throughout construction to accommodate equipment access and will be repaved upon project completion.
Status/Project Update
A site walk occurred on February 18, 2026. Please use the Park Projects Inquiry box if you missed the walk and would like to learn more.
Construction has begun as of April 2026. We anticipate a construction duration of approximately 8 months. Repaving of Paint Branch Trail in the vicinity of the project will follow. Planting will occur in the appropriate season after the completion of construction.
Project Timeline
*Dates and times subject to change.
| Date | Project Stage and Resources |
|---|---|
| Summer 2024 | Topographic Survey and Data Collection |
| Fall 2024 – Winter 2025 | Concept Plan Development |
| Spring – Fall 2025 | Detailed Design, Permits and Construction Documents |
| February 18, 2026 | Collingwood Outfalls and Lemontree Tributary Restoration Site Walk Location: Tamarack Neighborhood Park (13205 Collingwood Terrace, Colesville, MD) |
| Winter 2026 | Bidding and Preliminary Construction Activities |
| Spring 2026 – Fall 2026 | Construction Commenced April 2026 |