US Bridges

Coastal HWY / SR1 over Broadkill River

Good

Sussex County, Delaware · East of Milton · Structure no. 3155N014

Built
1967
58 years old, rebuilt 2022
Condition
Good
inspected September 2023
Type
Stringer/Multi-beam or Girder
Steel Continuous
Length
285 ft
5 main spans
Daily traffic
17,782
2022 count
Owner
State
State Highway Agency

About this bridge

Coastal HWY / SR1 over Broadkill River is a steel continuous stringer/multi-beam or girder carrying Coastal HWY / SR1 over Broadkill River in Sussex County, Delaware. It was built in 1967 and reconstructed in 2022, so it is 58 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 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 17,782 vehicles a day, roughly 14% of them trucks, projected to reach 17,386 by 2042. The structure is 285 ft (86.9 m) long and 36 ft wide. If it were closed, the detour would be 0.6 mi (1 km).

CarriesCoastal HWY / SR1
CrossesBroadkill River
LocationEast of Milton
RouteState Highway 1
Coordinates38.79066, -75.25168
Functional classRural Principal Arterial - Other

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.
Superstructure7 GoodSome minor problems.
Substructure7 GoodSome minor problems.
Channel and channel protection6 SatisfactoryStructural elements show some minor deterioration.
Last inspectionSeptember 2023
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 adequacy8: Equal to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating53.9 US tons
Inventory rating41.4 US tons

Structure

MaterialSteel Continuous
DeckConcrete, precast panels
Main spans5
Design loadHL 93
Structure length285 ft (86.9 m)
Longest span79 ft (24 m)
Deck width36 ft (11 m)
Roadway width34 ft (10.5 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic17,782 (2022)
Projected traffic17,386 by 2042
Trucks14%
Lanes on structure2
Traffic directionOne-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 proposedRehabilitation because of general structure deterioration or inadequate strength
Estimated improvement cost$1.5 million
NavigationNavigation control on waterway (bridge permit required)

Frequently asked questions

When was Coastal HWY / SR1 over Broadkill River built?

It was built in 1967, making it 58 years old in 2025. It was reconstructed in 2022.

What condition is Coastal HWY / SR1 over Broadkill River 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 September 2023.

How much traffic does Coastal HWY / SR1 over Broadkill River carry?

About 17,782 vehicles per day (2022 count), of which roughly 14% are trucks.

How long is Coastal HWY / SR1 over Broadkill River?

The structure is 285 ft (86.9 m) long with a longest span of 79 ft (24 m) and a deck 36 ft wide.

Who owns Coastal HWY / SR1 over Broadkill River?

It is owned by the State Highway Agency.