US Bridges

Dupont HWY/US13 over St. Jones River

Fair

Kent County, Delaware · Dover · Structure no. 2024A024

Built
1951
74 years old
Condition
Fair
inspected October 2023
Type
Tee Beam
Concrete Continuous
Length
204 ft
3 main spans
Daily traffic
22,690
2022 count
Owner
State
State Highway Agency

About this bridge

Dupont HWY/US13 over St. Jones River is a concrete continuous tee beam carrying Dupont HWY/US13 over St. Jones River in Kent 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 22,690 vehicles a day, roughly 7% of them trucks, projected to reach 29,843 by 2042. The structure is 204 ft (62.3 m) long and 76 ft wide. If it were closed, the detour would be 1.2 mi (2 km).

Location

Open in Google Maps
CarriesDupont HWY/US13
CrossesSt. Jones River
LocationDover
RouteU.S. Route 13
CountyKent County
StateDelaware
Coordinates39.14887, -75.51524
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
Deck7 GoodSome minor problems.
Superstructure7 GoodSome minor problems.
Substructure6 SatisfactoryStructural elements show some minor deterioration.
Channel and channel protection8 Very GoodNo problems noted.
Last inspectionOctober 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 adequacy6: Equal to present minimum criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating35.7 US tons
Inventory rating27.4 US tons

Structure

Structure typeTee Beam
MaterialConcrete Continuous
DeckConcrete, cast-in-place
Main spans3
Design loadHS 20
Structure length204 ft (62.3 m)
Longest span82 ft (25 m)
Deck width76 ft (23.2 m)
Roadway width60 ft (18.3 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic22,690 (2022)
Projected traffic29,843 by 2042
Trucks7%
Lanes on structure4
Traffic directionTwo-way traffic
CarriesHighway and pedestrian
CrossesWaterway
Detour if closed1.2 mi (2 km)
TollOn a free road
National Highway SystemYes

Ownership and planned work

OwnerState Highway Agency
Maintained byState Highway Agency
Historic statusEligible for the National Register of Historic Places
Work proposedNone recorded
Estimated improvement cost—
NavigationNavigation control on waterway (bridge permit required)

Frequently asked questions

When was Dupont HWY/US13 over St. Jones River built?

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

What condition is Dupont HWY/US13 over St. Jones River 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 October 2023.

How much traffic does Dupont HWY/US13 over St. Jones River carry?

About 22,690 vehicles per day (2022 count), of which roughly 7% are trucks.

How long is Dupont HWY/US13 over St. Jones River?

The structure is 204 ft (62.3 m) long with a longest span of 82 ft (25 m) and a deck 76 ft wide.

Who owns Dupont HWY/US13 over St. Jones River?

It is owned by the State Highway Agency.