Map of construction project districts


Portsmouth Road over Flat Branch

Culvert Replacement in Prince William County

Area Maps

Project Photos

Project at a Glance

Begin Date
April 2015

Est Completion Date
August 2015

Approx. $1,257,000

Prince William

Northern Virginia

Brian Morrison, P.E.
Ray Burkhardt, P.E.
Claudia Llana, P.E.

About the Project

This project will reconstruct the culvert at Portsmouth Road (Route 1529) over Flat Branch, near Deward Court and Fairmont Avenue in Prince William County.  The existing culvert is structurally deficient and consists of three corrugated metal pipes supported by temporary shoring. The structure was built in 1980. The new culvert will be a triple concrete box culvert. Construction is scheduled to begin spring 2015 and be completed by late summer 2015.

Cost and Schedule

Estimated Project Costs

Total estimated cost: $1,257,000
Preliminary engineering: $300,000 
Utilities: $63,000  
Right of way acquisition: $94,000  
Construction: $800,000  

Anticipated schedule

April 2015 - Begin construction
August 2015 - Estimated project completion

Traffic Impacts

When construction begins, Portsmouth Road adjacent to the culvert will be closed for approximately 90 calendar days during the Months of June, July and August 2015. During construction drivers will be detoured via Fairmount Avenue, Lomond Drive and Clifton Street.         


Project Location Map and Proposed Detour

Right of Way Documentation:

Title Sheet, Data Sheet, Project Plans and Right of Way Plan Sheet

State Environmental Review Process (SERP) Closure Memorandum

State Project: 1529-076-099,P101,R201,M501,D653 

UPC: 103588

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Page last modified: Feb. 21, 2014