Downstream North Dumbarton Street Culvert Replacement

Construction

Location

3900 North Dumbarton Street, Arlington, VA   View Map

Status

Construction

Project Background

The existing culverts that carry Little Pimmit Run under North Dumbarton Street have reached the end of their useful life and are in need of replacement.  The culverts are undersized for the location and sometimes Little Pimmit Run stream overflows the top of the culverts.  The new culverts will be an open span arch design to better allow flow through the culvert.  The culvert replacement project aims to provide a long-term solution for the residents of N Dumbarton Street, improving their quality of life and reducing the risk of flood damage to properties. Furthermore, the project will contribute to the overall health and sustainability of the Little Run watershed.  Both the upstream and downstream culverts will be replaced.  

The Federal Emergency Management Agency (FEMA) floodplains have also been analyzed to ensure the most effective flood mitigation strategies are implemented.

Project Tasks 
  • Replace the existing downstream metal double culvert (12'Wx8'Hx80'L) with a proposed precast concrete arch culvert (28'Wx10.3'Hx80.2'L)
  • Abandon the existing 15-inch crossing at property #3900 and reconnect the proposed 15-inch concrete pipe to the new culvert downstream.
  • Relocate the existing water main and gas lines along N Dumbarton Street to accommodate the new culvert placement.
  • Stabilize the surrounding areas affected by construction to minimize environmental impact and ensure a safe environment for residents.
Project Plans 

Downstream Culvert 

Project Schedule

Project Design - 2023-2025

Construction

  • Some survey work and tree removal was completed in April, 2026. 
  • Construction is scheduled to start around July 7, 2026 and is expected to last approximately 12 months.

 

Project Engagement 

Event Date Event Type Meeting Materials
May 1, 2023, 6 PM Community Meeting

Meeting Presentation

Meeting video
2024-2025 Meetings with adjacent property owners 

 

Related Links 

 

Back to top