US Bridges

Little Mastens Cor over Black Swamp Creek

Fair

Kent County, Delaware · South of Felton · Structure no. 2284A284

Built
1977
48 years old
Condition
Fair
inspected October 2021
Type
Culvert
Concrete
Length
24 ft
1 main span
Daily traffic
455
2020 count
Owner
State
State Highway Agency

About this bridge

Little Mastens Cor over Black Swamp Creek is a concrete culvert carrying Little Mastens Cor over Black Swamp Creek in Kent County, Delaware. It was built in 1977, so it is 48 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 455 vehicles a day, roughly 13% of them trucks, projected to reach 565 by 2042. The structure is 24 ft (7.3 m) long and 41 ft wide. If it were closed, the detour would be 1.9 mi (3 km).

CarriesLittle Mastens Cor
CrossesBlack Swamp Creek
LocationSouth of Felton
RouteCounty Highway 284
Coordinates38.97398, -75.5903
Functional classRural Local

Condition and inspection

Fair

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

ComponentRatingMeaning
Channel and channel protection8 Very GoodNo problems noted.
Culvert6 SatisfactoryStructural elements show some minor deterioration.
Last inspectionOctober 2021
Inspection intervalevery 48 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation6: Equal to present minimum criteria
Deck geometry7: Better than present minimum criteria
Waterway adequacy7: Better than present minimum criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating71.1 US tons
Inventory rating55 US tons

Structure

Structure typeCulvert
MaterialConcrete
DeckConcrete, cast-in-place
Main spans1
Design loadHS 20
Structure length24 ft (7.3 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 traffic455 (2020)
Projected traffic565 by 2042
Trucks13%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed1.9 mi (3 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 Little Mastens Cor over Black Swamp Creek built?

It was built in 1977, making it 48 years old in 2025.

What condition is Little Mastens Cor over Black Swamp Creek 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 2021.

How much traffic does Little Mastens Cor over Black Swamp Creek carry?

About 455 vehicles per day (2020 count), of which roughly 13% are trucks.

How long is Little Mastens Cor over Black Swamp Creek?

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

Who owns Little Mastens Cor over Black Swamp Creek?

It is owned by the State Highway Agency.