US Bridges

Sudley Road over Flat Branch

Fair

Manassas city, Virginia · 00.08FR1004/00.05TO661 · Structure no. 000000000014279

Built
1970
55 years old
Condition
Fair
inspected June 2023
Type
Culvert
Concrete
Length
32 ft
4 main spans
Daily traffic
25,073
2022 count
Owner
State
State Highway Agency

About this bridge

Sudley Road over Flat Branch is a concrete culvert carrying Sudley Road over Flat Branch in Manassas city, Virginia. It was built in 1970, so it is 55 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 6 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 25,073 vehicles a day, roughly 1% of them trucks, projected to reach 27,956 by 2045. The structure is 32 ft (9.8 m) long. If it were closed, the detour would be 1.2 mi (2 km).

Location

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CarriesSudley Road
CrossesFlat Branch
Location00.08FR1004/00.05TO661
RouteState Highway 234
CountyManassas city
StateVirginia
Coordinates38.77006, -77.49456
Functional classUrban Minor Arterial

Condition and inspection

Fair

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

ComponentRatingMeaning
Channel and channel protection5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Culvert6 SatisfactoryStructural elements show some minor deterioration.
Last inspectionJune 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation6: Equal to present minimum criteria
Waterway adequacy7: Better than present minimum criteria
Approach roadway alignment6: Equal to present minimum criteria
Operating rating97 US tons
Inventory rating58 US tons

Structure

Structure typeCulvert
MaterialConcrete
DeckNot applicable
Main spans4
Design loadHS 20
Structure length32 ft (9.8 m)
Longest span7 ft (2.1 m)
Deck width0 ft (0 m)
Roadway width0 ft (0 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic25,073 (2022)
Projected traffic27,956 by 2045
Trucks1%
Lanes on structure6
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed1.2 mi (2 km)
TollOn a free road
National Highway SystemNo

Ownership and planned work

OwnerState Highway Agency
Maintained byState Highway Agency
Historic statusNot eligible for the National Register of Historic Places
Work proposedNone recorded
Estimated improvement cost—
NavigationNo navigation control on waterway

Frequently asked questions

When was Sudley Road over Flat Branch built?

It was built in 1970, making it 55 years old in 2025.

What condition is Sudley Road over Flat Branch 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 June 2023.

How much traffic does Sudley Road over Flat Branch carry?

About 25,073 vehicles per day (2022 count), of which roughly 1% are trucks.

How long is Sudley Road over Flat Branch?

The structure is 32 ft (9.8 m) long with a longest span of 7 ft (2.1 m).

Who owns Sudley Road over Flat Branch?

It is owned by the State Highway Agency.