US Bridges

Marrows RD over AMTRAK

Fair

New Castle County, Delaware · Newark · Structure no. 1645 351

Built
1976
49 years old
Condition
Fair
inspected July 2022
Type
Stringer/Multi-beam or Girder
Steel Continuous
Length
277 ft
3 main spans
Daily traffic
11,422
2021 count
Owner
State
State Highway Agency

About this bridge

Marrows RD over AMTRAK is a steel continuous stringer/multi-beam or girder carrying Marrows RD over AMTRAK in New Castle County, Delaware. It was built in 1976, so it is 49 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 11,422 vehicles a day, roughly 8% of them trucks, projected to reach 14,977 by 2042. The structure is 277 ft (84.4 m) long and 55 ft wide. If it were closed, the detour would be 0.6 mi (1 km).

CarriesMarrows RD
CrossesAMTRAK
LocationNewark
RouteCounty Highway 351
Coordinates39.67748, -75.72925
Functional classUrban Collector

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.
Last inspectionJuly 2022
Inspection intervalevery 48 months
Operating statusOpen, no restriction
ScourBridge not over waterway
Structural evaluation6: Equal to present minimum criteria
Deck geometry9: Superior to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating63.6 US tons
Inventory rating49.3 US tons

Structure

MaterialSteel Continuous
DeckConcrete, cast-in-place
Main spans3
Design loadHS 20
Structure length277 ft (84.4 m)
Longest span117 ft (35.7 m)
Deck width55 ft (16.8 m)
Roadway width45 ft (13.7 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic11,422 (2021)
Projected traffic14,977 by 2042
Trucks8%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway and pedestrian
CrossesRailroad
Detour if closed0.6 mi (1 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—
NavigationNot applicable (no waterway)

Frequently asked questions

When was Marrows RD over AMTRAK built?

It was built in 1976, making it 49 years old in 2025.

What condition is Marrows RD over AMTRAK 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 July 2022.

How much traffic does Marrows RD over AMTRAK carry?

About 11,422 vehicles per day (2021 count), of which roughly 8% are trucks.

How long is Marrows RD over AMTRAK?

The structure is 277 ft (84.4 m) long with a longest span of 117 ft (35.7 m) and a deck 55 ft wide.

Who owns Marrows RD over AMTRAK?

It is owned by the State Highway Agency.