US Bridges

Dupont RD over CSX Railroad

Fair

New Castle County, Delaware · Elsmere · Structure no. 1629 027

Built
1980
45 years old
Condition
Fair
inspected June 2024
Type
Stringer/Multi-beam or Girder
Steel Continuous
Length
1,321 ft
11 main spans
Daily traffic
10,078
2023 count
Owner
State
State Highway Agency

About this bridge

Dupont RD over CSX Railroad is a steel continuous stringer/multi-beam or girder carrying Dupont RD over CSX Railroad in New Castle County, Delaware. It was built in 1980, so it is 45 years old, younger 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 10,078 vehicles a day, roughly 9% of them trucks, projected to reach 13,843 by 2042. The structure is 1,321 ft (402.6 m) long and 65 ft wide. If it were closed, the detour would be 2.5 mi (4 km).

Location

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CarriesDupont RD
CrossesCSX Railroad
LocationElsmere
RouteState Highway 100
CountyNew Castle County
StateDelaware
Coordinates39.73606, -75.58856
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
Deck7 GoodSome minor problems.
Superstructure6 SatisfactoryStructural elements show some minor deterioration.
Substructure6 SatisfactoryStructural elements show some minor deterioration.
Channel and channel protection7 GoodSome minor problems.
Last inspectionJune 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation6: Equal to present minimum criteria
Deck geometry4: Meets minimum tolerable limits to be left in place as is
Waterway adequacy9: Superior to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating35.7 US tons
Inventory rating27.4 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialSteel Continuous
DeckConcrete, cast-in-place
Main spans11 (+1 approach)
Design loadHS 20
Structure length1,321 ft (402.6 m)
Longest span149 ft (45.5 m)
Deck width65 ft (19.8 m)
Roadway width54 ft (16.5 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic10,078 (2023)
Projected traffic13,843 by 2042
Trucks9%
Lanes on structure4
Traffic directionTwo-way traffic
CarriesHighway and pedestrian
CrossesHighway, waterway and railroad
Detour if closed2.5 mi (4 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 proposedRehabilitation because of general structure deterioration or inadequate strength
Estimated improvement cost$1.3 million
NavigationNo navigation control on waterway

Frequently asked questions

When was Dupont RD over CSX Railroad built?

It was built in 1980, making it 45 years old in 2025.

What condition is Dupont RD over CSX Railroad 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 June 2024.

How much traffic does Dupont RD over CSX Railroad carry?

About 10,078 vehicles per day (2023 count), of which roughly 9% are trucks.

How long is Dupont RD over CSX Railroad?

The structure is 1,321 ft (402.6 m) long with a longest span of 149 ft (45.5 m) and a deck 65 ft wide.

Who owns Dupont RD over CSX Railroad?

It is owned by the State Highway Agency.