US Bridges

South State ST over Tidbury Branch

Fair

Kent County, Delaware · South of Dover · Structure no. 2027A027

Built
1919
106 years old, rebuilt 1958
Condition
Fair
inspected August 2023
Type
Arch - Deck
Concrete
Length
32 ft
1 main span
Daily traffic
9,355
2022 count
Owner
State
State Highway Agency

About this bridge

South State ST over Tidbury Branch is a concrete arch - deck carrying South State ST over Tidbury Branch in Kent County, Delaware. It was built in 1919 and reconstructed in 1958, so it is 106 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 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 9,355 vehicles a day, roughly 7% of them trucks, projected to reach 15,561 by 2042. The structure is 32 ft (9.8 m) long and 52 ft wide. If it were closed, the detour would be 0.6 mi (1 km).

Location

Open in Google Maps
CarriesSouth State ST
CrossesTidbury Branch
LocationSouth of Dover
RouteU.S. Route 113A
CountyKent County
StateDelaware
Coordinates39.10738, -75.51438
Functional classUrban Minor Arterial

Condition and inspection

Fair

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

ComponentRatingMeaning
Superstructure6 SatisfactoryStructural elements show some minor deterioration.
Substructure5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Channel and channel protection8 Very GoodNo problems noted.
Last inspectionAugust 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourScour critical; foundations unstable for calculated scour conditions
Structural evaluation5: Somewhat better than minimum adequacy to tolerate being left in place as is
Deck geometry9: Superior to present desirable criteria
Waterway adequacy6: Equal to present minimum criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating62.5 US tons
Inventory rating48.2 US tons

Structure

Structure typeArch - Deck
MaterialConcrete
DeckNot applicable
Main spans1
Design loadH 20
Structure length32 ft (9.8 m)
Longest span32 ft (9.8 m)
Deck width52 ft (15.9 m)
Roadway width50 ft (15.2 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic9,355 (2022)
Projected traffic15,561 by 2042
Trucks7%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed0.6 mi (1 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 South State ST over Tidbury Branch built?

It was built in 1919, making it 106 years old in 2025. It was reconstructed in 1958.

What condition is South State ST over Tidbury Branch 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 August 2023.

How much traffic does South State ST over Tidbury Branch carry?

About 9,355 vehicles per day (2022 count), of which roughly 7% are trucks.

How long is South State ST over Tidbury Branch?

The structure is 32 ft (9.8 m) long with a longest span of 32 ft (9.8 m) and a deck 52 ft wide.

Who owns South State ST over Tidbury Branch?

It is owned by the State Highway Agency.