US Bridges

Seashore Highway over Collins Mill Pond

GoodPosted for load

Sussex County, Delaware · East of Bridgeville · Structure no. 3642 018

Built
1922
103 years old, rebuilt 1962
Condition
Good
inspected August 2023
Type
Culvert
Concrete
Length
25 ft
2 main spans
Daily traffic
10,964
2022 count
Owner
State
State Highway Agency

About this bridge

Seashore Highway over Collins Mill Pond is a concrete culvert carrying Seashore Highway over Collins Mill Pond in Sussex County, Delaware. It was built in 1922 and reconstructed in 1962, so it is 103 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. Its operating status is: posted for load restriction.

It carries about 10,964 vehicles a day, roughly 14% of them trucks, projected to reach 10,997 by 2042. The structure is 25 ft (7.7 m) long and 50 ft wide. If it were closed, the detour would be 5 mi (8 km).

Location

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CarriesSeashore Highway
CrossesCollins Mill Pond
LocationEast of Bridgeville
RouteState Highway 18
CountySussex County
StateDelaware
Coordinates38.70845, -75.52131
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
Channel and channel protection8 Very GoodNo problems noted.
Culvert7 GoodSome minor problems.
Last inspectionAugust 2023
Inspection intervalevery 24 months
Operating statusPosted for load restriction
ScourFoundations stable; scour above top of footing
Structural evaluation5: Somewhat better than minimum adequacy to tolerate being left in place as is
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 rating31.1 US tons
Inventory rating23.9 US tons

Structure

Structure typeCulvert
MaterialConcrete
DeckNot applicable
Main spans2
Design loadH 20
Structure length25 ft (7.7 m)
Longest span12 ft (3.7 m)
Deck width50 ft (15.1 m)
Roadway width39 ft (12 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic10,964 (2022)
Projected traffic10,997 by 2042
Trucks14%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed5 mi (8 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 Seashore Highway over Collins Mill Pond built?

It was built in 1922, making it 103 years old in 2025. It was reconstructed in 1962.

What condition is Seashore Highway over Collins Mill Pond 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 2023.

How much traffic does Seashore Highway over Collins Mill Pond carry?

About 10,964 vehicles per day (2022 count), of which roughly 14% are trucks.

How long is Seashore Highway over Collins Mill Pond?

The structure is 25 ft (7.7 m) long with a longest span of 12 ft (3.7 m) and a deck 50 ft wide.

Who owns Seashore Highway over Collins Mill Pond?

It is owned by the State Highway Agency.