US Bridges

Dagsboro RD over Whartons Branch

Good

Sussex County, Delaware · S/E of Millsboro · Structure no. 3523 334

Built
1940
85 years old
Condition
Good
inspected August 2024
Type
Slab
Concrete
Length
28 ft
1 main span
Daily traffic
9,578
2023 count
Owner
State
State Highway Agency

About this bridge

Dagsboro RD over Whartons Branch is a concrete slab carrying Dagsboro RD over Whartons Branch in Sussex County, Delaware. It was built in 1940, so it is 85 years old, older than the Delaware average of 47.3 years.

The most recent inspection reported to the Federal Highway Administration rates it in good condition with a lowest component rating of 8 out of 9. All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted.

It carries about 9,578 vehicles a day, roughly 8% of them trucks, projected to reach 13,146 by 2042. The structure is 28 ft (8.5 m) long and 41 ft wide. If it were closed, the detour would be 5 mi (8 km).

CarriesDagsboro RD
CrossesWhartons Branch
LocationS/E of Millsboro
RouteCounty Highway 334
Coordinates38.56426, -75.2741
Functional classRural Minor Arterial

Condition and inspection

Good

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

ComponentRatingMeaning
Deck8 Very GoodNo problems noted.
Superstructure8 Very GoodNo problems noted.
Substructure8 Very GoodNo problems noted.
Channel and channel protection7 GoodSome minor problems.
Last inspectionAugust 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation7: Better than 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 rating39.7 US tons
Inventory rating30.8 US tons

Structure

Structure typeSlab
MaterialConcrete
DeckConcrete, cast-in-place
Main spans1
Design loadH 15
Structure length28 ft (8.5 m)
Longest span24 ft (7.3 m)
Deck width41 ft (12.5 m)
Roadway width38 ft (11.6 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic9,578 (2023)
Projected traffic13,146 by 2042
Trucks8%
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 proposedReplacement because of substandard load-carrying capacity or roadway geometry
Estimated improvement cost$1 million
NavigationNo navigation control on waterway

Frequently asked questions

When was Dagsboro RD over Whartons Branch built?

It was built in 1940, making it 85 years old in 2025.

What condition is Dagsboro RD over Whartons Branch 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 August 2024.

How much traffic does Dagsboro RD over Whartons Branch carry?

About 9,578 vehicles per day (2023 count), of which roughly 8% are trucks.

How long is Dagsboro RD over Whartons Branch?

The structure is 28 ft (8.5 m) long with a longest span of 24 ft (7.3 m) and a deck 41 ft wide.

Who owns Dagsboro RD over Whartons Branch?

It is owned by the State Highway Agency.