US Bridges

Centennial Road over Blackwater Swamp

Fair

Prince George County, Virginia · 1.49 FR 629 & 0.86 to 695 · Structure no. 000000000014121

Built
1956
69 years old
Condition
Fair
inspected February 2024
Type
Culvert
Concrete
Length
33 ft
3 main spans
Daily traffic
213
2014 count
Owner
State
State Highway Agency

About this bridge

Centennial Road over Blackwater Swamp is a concrete culvert carrying Centennial Road over Blackwater Swamp in Prince George County, Virginia. It was built in 1956, so it is 69 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 213 vehicles a day, projected to reach 303 by 2042. The structure is 33 ft (10 m) long. If it were closed, the detour would be 123.7 mi (199 km).

Location

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CarriesCentennial Road
CrossesBlackwater Swamp
Location1.49 FR 629 & 0.86 to 695
RouteCounty Highway 635
CountyPrince George County
StateVirginia
Coordinates37.17179, -77.23452
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
Channel and channel protection4 PoorAdvanced section loss, deterioration, spalling or scour.
Culvert5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Last inspectionFebruary 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; action required to protect exposed foundations
Structural evaluation5: Somewhat better than minimum adequacy to tolerate being left in place as is
Waterway adequacy6: Equal to present minimum criteria
Approach roadway alignment6: Equal to present minimum criteria
Operating rating41 US tons
Inventory rating24.6 US tons

Structure

Structure typeCulvert
MaterialConcrete
DeckNot applicable
Main spans3
Design loadHS 20
Structure length33 ft (10 m)
Longest span11 ft (3.5 m)
Deck width0 ft (0 m)
Roadway width0 ft (0 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic213 (2014)
Projected traffic303 by 2042
Trucks0%
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

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 Centennial Road over Blackwater Swamp built?

It was built in 1956, making it 69 years old in 2025.

What condition is Centennial Road over Blackwater Swamp 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 February 2024.

How much traffic does Centennial Road over Blackwater Swamp carry?

About 213 vehicles per day (2014 count).

How long is Centennial Road over Blackwater Swamp?

The structure is 33 ft (10 m) long with a longest span of 11 ft (3.5 m).

Who owns Centennial Road over Blackwater Swamp?

It is owned by the State Highway Agency.