US Bridges

MCB-8 over Branch of Cedar Run

Fair

Prince William County, Virginia · 1.2KM South of SR-646 · Structure no. 2VA00FF

Built
1947
78 years old, rebuilt 1993
Condition
Fair
inspected September 2023
Type
Slab
Prestressed Concrete
Length
39 ft
1 main span
Daily traffic
500
2015 count
Owner
Federal
Navy / Marines

About this bridge

MCB-8 over Branch of Cedar Run is a prestressed concrete slab carrying MCB-8 over Branch of Cedar Run in Prince William County, Virginia. It was built in 1947 and reconstructed in 1993, so it is 78 years old, older than the Virginia average of 50.7 years.

The most recent inspection reported to the Federal Highway Administration rates it in fair condition with a lowest component rating of 5 out of 9. The lowest-rated primary component is rated 5 or 6. Minor deterioration is present but the structure is sound.

It carries about 500 vehicles a day, roughly 10% of them trucks, projected to reach 600 by 2043. The structure is 39 ft (11.8 m) long and 28 ft wide. If it were closed, the detour would be 6.8 mi (11 km).

Location

Open in Google Maps
CarriesMCB-8
CrossesBranch of Cedar Run
Location1.2KM South of SR-646
CountyPrince William County
StateVirginia
Coordinates38.6311, -77.49677
Functional classRural Local

Condition and inspection

Fair

The lowest-rated primary component is rated 5 or 6. Minor deterioration is present but the structure is sound.

ComponentRatingMeaning
Deck7 GoodSome minor problems.
Superstructure7 GoodSome minor problems.
Substructure5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Channel and channel protection6 SatisfactoryStructural elements show some minor deterioration.
Last inspectionSeptember 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour within limits of footing or piles
Structural evaluation5: Somewhat better than minimum adequacy to tolerate being left in place as is
Deck geometry4: Meets minimum tolerable limits to be left in place as is
Waterway adequacy7: Better than present minimum criteria
Approach roadway alignment6: Equal to present minimum criteria
Operating rating87.9 US tons
Inventory rating48.6 US tons

Structure

Structure typeSlab
MaterialPrestressed Concrete
DeckConcrete, precast panels
Main spans1
Design loadHS 20 + Mod
Structure length39 ft (11.8 m)
Longest span39 ft (11.8 m)
Deck width28 ft (8.5 m)
Roadway width25 ft (7.5 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic500 (2015)
Projected traffic600 by 2043
Trucks10%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed6.8 mi (11 km)
TollOn a free road
National Highway SystemNo

Ownership and planned work

OwnerNavy / Marines
Maintained byNavy / Marines
Historic statusNot eligible for the National Register of Historic Places
Work proposedOther structural work, including hydraulic replacements
Estimated improvement cost$42,000 (2023 estimate)
NavigationNo navigation control on waterway

Frequently asked questions

When was MCB-8 over Branch of Cedar Run built?

It was built in 1947, making it 78 years old in 2025. It was reconstructed in 1993.

What condition is MCB-8 over Branch of Cedar Run in?

The National Bridge Inventory rates it in fair condition. The lowest-rated primary component is rated 5 or 6. Minor deterioration is present but the structure is sound. The last reported inspection was in September 2023.

How much traffic does MCB-8 over Branch of Cedar Run carry?

About 500 vehicles per day (2015 count), of which roughly 10% are trucks.

How long is MCB-8 over Branch of Cedar Run?

The structure is 39 ft (11.8 m) long with a longest span of 39 ft (11.8 m) and a deck 28 ft wide.

Who owns MCB-8 over Branch of Cedar Run?

It is owned by the Navy / Marines.