US Bridges

US301 NB over SR71/SUMMIT Bridge RD

Good

New Castle County, Delaware · North of Middletown · Structure no. 1470N084

Built
2018
7 years old
Condition
Good
inspected November 2022
Type
Stringer/Multi-beam or Girder
Prestressed Concrete
Length
212 ft
2 main spans
Daily traffic
7,301
2021 count
Owner
State
State Highway Agency

About this bridge

US301 NB over SR71/SUMMIT Bridge RD is a prestressed concrete stringer/multi-beam or girder carrying US301 NB over SR71/SUMMIT Bridge RD in New Castle County, Delaware. It was built in 2018, so it is 7 years old, younger 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 7,301 vehicles a day, roughly 9% of them trucks, projected to reach 3,415 by 2042. The structure is 212 ft (64.6 m) long and 53 ft wide. If it were closed, the detour would be 1.2 mi (2 km).

Location

Open in Google Maps
CarriesUS301 NB
CrossesSR71/SUMMIT Bridge RD
LocationNorth of Middletown
RouteU.S. Route 301
CountyNew Castle County
StateDelaware
Coordinates39.48858, -75.71739
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
Deck7 GoodSome minor problems.
Superstructure7 GoodSome minor problems.
Substructure7 GoodSome minor problems.
Last inspectionNovember 2022
Inspection intervalevery 48 months
Operating statusOpen, no restriction
ScourBridge not over waterway
Structural evaluation7: Better than present minimum criteria
Deck geometry6: Equal to present minimum criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating52.1 US tons
Inventory rating39.2 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialPrestressed Concrete
DeckConcrete, cast-in-place
Main spans2
Design loadHL 93
Structure length212 ft (64.6 m)
Longest span106 ft (32.3 m)
Deck width53 ft (16.1 m)
Roadway width50 ft (15.2 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic7,301 (2021)
Projected traffic3,415 by 2042
Trucks9%
Lanes on structure3
Traffic directionOne-way traffic
CarriesHighway
CrossesHighway
Detour if closed1.2 mi (2 km)
TollOn a toll road
National Highway SystemYes
Strategic Highway NetworkNon-Interstate STRAHNET route

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 US301 NB over SR71/SUMMIT Bridge RD built?

It was built in 2018, making it 7 years old in 2025.

What condition is US301 NB over SR71/SUMMIT Bridge RD 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 November 2022.

How much traffic does US301 NB over SR71/SUMMIT Bridge RD carry?

About 7,301 vehicles per day (2021 count), of which roughly 9% are trucks.

How long is US301 NB over SR71/SUMMIT Bridge RD?

The structure is 212 ft (64.6 m) long with a longest span of 106 ft (32.3 m) and a deck 53 ft wide.

Who owns US301 NB over SR71/SUMMIT Bridge RD?

It is owned by the State Highway Agency.