US Bridges

MCB-1 over Cedar Run

Fair

Prince William County, Virginia · 1.3KM North of MCB-8 · Structure no. 2VA00GG

Built
1947
78 years old, rebuilt 1994
Condition
Fair
inspected September 2023
Type
Stringer/Multi-beam or Girder
Steel
Length
114 ft
1 main span
Daily traffic
500
2015 count
Owner
Federal
Navy / Marines

About this bridge

MCB-1 over Cedar Run is a steel stringer/multi-beam or girder carrying MCB-1 over Cedar Run in Prince William County, Virginia. It was built in 1947 and reconstructed in 1994, 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 2039. The structure is 114 ft (34.6 m) long and 27 ft wide. If it were closed, the detour would be 123.7 mi (199 km).

Location

Open in Google Maps
CarriesMCB-1
CrossesCedar Run
Location1.3KM North of MCB-8
CountyPrince William County
StateVirginia
Coordinates38.62385, -77.52846
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.
Superstructure6 SatisfactoryStructural elements show some minor deterioration.
Substructure5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Channel and channel protection5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
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 adequacy8: Equal to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating110.1 US tons
Inventory rating69.4 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialSteel
DeckConcrete, cast-in-place
Main spans1
Design loadUnknown
Structure length114 ft (34.6 m)
Longest span114 ft (34.6 m)
Deck width27 ft (8.1 m)
Roadway width24 ft (7.3 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic500 (2015)
Projected traffic600 by 2039
Trucks10%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed123.7 mi (199 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$167,000 (2023 estimate)
NavigationNo navigation control on waterway

Frequently asked questions

When was MCB-1 over Cedar Run built?

It was built in 1947, making it 78 years old in 2025. It was reconstructed in 1994.

What condition is MCB-1 over 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-1 over Cedar Run carry?

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

How long is MCB-1 over Cedar Run?

The structure is 114 ft (34.6 m) long with a longest span of 114 ft (34.6 m) and a deck 27 ft wide.

Who owns MCB-1 over Cedar Run?

It is owned by the Navy / Marines.