US Bridges

River Road over Assamoosick Swamp

Fair

Southampton County, Virginia · 4.24 to 35N 1.20TO 35S · Structure no. 000000000017829

Built
1971
54 years old
Condition
Fair
inspected February 2023
Type
Stringer/Multi-beam or Girder
Steel
Length
145 ft
3 main spans
Daily traffic
113
2018 count
Owner
State
State Highway Agency

About this bridge

River Road over Assamoosick Swamp is a steel stringer/multi-beam or girder carrying River Road over Assamoosick Swamp in Southampton County, Virginia. It was built in 1971, so it is 54 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 113 vehicles a day, projected to reach 128 by 2045. The structure is 145 ft (44.2 m) long and 30 ft wide. If it were closed, the detour would be 5 mi (8 km).

Location

Open in Google Maps
CarriesRiver Road
CrossesAssamoosick Swamp
Location4.24 to 35N 1.20TO 35S
RouteCounty Highway 647
CountySouthampton County
StateVirginia
Coordinates36.75262, -77.09641
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.
Substructure6 SatisfactoryStructural elements show some minor deterioration.
Channel and channel protection7 GoodSome minor problems.
Last inspectionFebruary 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation6: Equal to present minimum criteria
Deck geometry5: Somewhat better than minimum adequacy to tolerate being left in place as is
Waterway adequacy8: Equal to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating82.1 US tons
Inventory rating63.3 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialSteel
DeckConcrete, cast-in-place
Main spans3
Design loadHS 20 + Mod
Structure length145 ft (44.2 m)
Longest span49 ft (14.9 m)
Deck width30 ft (9.1 m)
Roadway width26 ft (7.9 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic113 (2018)
Projected traffic128 by 2045
Trucks0%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed5 mi (8 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 River Road over Assamoosick Swamp built?

It was built in 1971, making it 54 years old in 2025.

What condition is River Road over Assamoosick 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 2023.

How much traffic does River Road over Assamoosick Swamp carry?

About 113 vehicles per day (2018 count).

How long is River Road over Assamoosick Swamp?

The structure is 145 ft (44.2 m) long with a longest span of 49 ft (14.9 m) and a deck 30 ft wide.

Who owns River Road over Assamoosick Swamp?

It is owned by the State Highway Agency.