US Bridges

Ridley Road over Mill Swamp

Good

Southampton County, Virginia · 1.40 Mi. to Int. Rte. 675 · Structure no. 000000000017899

Built
1968
57 years old
Condition
Good
inspected December 2023
Type
Culvert
Concrete
Length
32 ft
3 main spans
Daily traffic
136
2018 count
Owner
State
State Highway Agency

About this bridge

Ridley Road over Mill Swamp is a concrete culvert carrying Ridley Road over Mill Swamp in Southampton County, Virginia. It was built in 1968, so it is 57 years old, older than the Virginia average of 50.7 years.

The most recent inspection reported to the Federal Highway Administration rates it in good condition with a lowest component rating of 7 out of 9. All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted.

It carries about 136 vehicles a day, projected to reach 154 by 2042. The structure is 32 ft (9.8 m) long. If it were closed, the detour would be 11.2 mi (18 km).

CarriesRidley Road
CrossesMill Swamp
Location1.40 Mi. to Int. Rte. 675
RouteCounty Highway 731
Coordinates36.67362, -77.08227
Functional classRural Local

Condition and inspection

Good

All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted.

ComponentRatingMeaning
Channel and channel protection5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Culvert7 GoodSome minor problems.
Last inspectionDecember 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour within limits of footing or piles
Structural evaluation7: Better than present minimum criteria
Waterway adequacy8: Equal to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating59.2 US tons
Inventory rating35.4 US tons

Structure

Structure typeCulvert
MaterialConcrete
DeckNot applicable
Main spans3
Design loadHS 20
Structure length32 ft (9.8 m)
Longest span10 ft (3 m)
Deck width0 ft (0 m)
Roadway width0 ft (0 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic136 (2018)
Projected traffic154 by 2042
Trucks0%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed11.2 mi (18 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 Ridley Road over Mill Swamp built?

It was built in 1968, making it 57 years old in 2025.

What condition is Ridley Road over Mill Swamp in?

The National Bridge Inventory rates it in good condition. All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted. The last reported inspection was in December 2023.

How much traffic does Ridley Road over Mill Swamp carry?

About 136 vehicles per day (2018 count).

How long is Ridley Road over Mill Swamp?

The structure is 32 ft (9.8 m) long with a longest span of 10 ft (3 m).

Who owns Ridley Road over Mill Swamp?

It is owned by the State Highway Agency.