US Bridges

Sussex Hgwy / US13 over Gravelly Run

Fair

Sussex County, Delaware · East of Bridgeville · Structure no. 3146A004

Built
1951
74 years old
Condition
Fair
inspected September 2022
Type
Slab
Concrete
Length
25 ft
1 main span
Daily traffic
23,386
2021 count
Owner
State
State Highway Agency

About this bridge

Sussex Hgwy / US13 over Gravelly Run is a concrete slab carrying Sussex Hgwy / US13 over Gravelly Run in Sussex County, Delaware. It was built in 1951, so it is 74 years old, older than the Delaware average of 47.3 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 23,386 vehicles a day, roughly 8% of them trucks, projected to reach 31,259 by 2042. The structure is 25 ft (7.7 m) long and 127 ft wide. If it were closed, the detour would be 0.6 mi (1 km).

Location

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CarriesSussex Hgwy / US13
CrossesGravelly Run
LocationEast of Bridgeville
RouteU.S. Route 13
CountySussex County
StateDelaware
Coordinates38.74476, -75.59264
Functional classRural Principal Arterial - Other

Condition and inspection

Fair

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

ComponentRatingMeaning
Deck6 SatisfactoryStructural elements show some minor deterioration.
Superstructure6 SatisfactoryStructural elements show some minor deterioration.
Substructure7 GoodSome minor problems.
Channel and channel protection8 Very GoodNo problems noted.
Last inspectionSeptember 2022
Inspection intervalevery 48 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation6: Equal to present minimum criteria
Deck geometry9: Superior to present desirable criteria
Waterway adequacy7: Better than present minimum criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating60.7 US tons
Inventory rating46.7 US tons

Structure

Structure typeSlab
MaterialConcrete
DeckConcrete, cast-in-place
Main spans1
Design loadHS 20
Structure length25 ft (7.7 m)
Longest span21 ft (6.5 m)
Deck width127 ft (38.6 m)
Roadway width122 ft (37.1 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic23,386 (2021)
Projected traffic31,259 by 2042
Trucks8%
Lanes on structure4
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed0.6 mi (1 km)
TollOn a free road
National Highway SystemYes

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 Sussex Hgwy / US13 over Gravelly Run built?

It was built in 1951, making it 74 years old in 2025.

What condition is Sussex Hgwy / US13 over Gravelly 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 2022.

How much traffic does Sussex Hgwy / US13 over Gravelly Run carry?

About 23,386 vehicles per day (2021 count), of which roughly 8% are trucks.

How long is Sussex Hgwy / US13 over Gravelly Run?

The structure is 25 ft (7.7 m) long with a longest span of 21 ft (6.5 m) and a deck 127 ft wide.

Who owns Sussex Hgwy / US13 over Gravelly Run?

It is owned by the State Highway Agency.