US Bridges

Dupont PKY/US13 NB over Blackbird Creek

Fair

New Castle County, Delaware · North of Blackbird · Structure no. 1488N001

Built
1933
92 years old
Condition
Fair
inspected June 2024
Type
Slab
Concrete
Length
48 ft
2 main spans
Daily traffic
11,021
2023 count
Owner
State
State Highway Agency

About this bridge

Dupont PKY/US13 NB over Blackbird Creek is a concrete slab carrying Dupont PKY/US13 NB over Blackbird Creek in New Castle County, Delaware. It was built in 1933, so it is 92 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 11,021 vehicles a day, roughly 12% of them trucks, projected to reach 11,764 by 2042. The structure is 48 ft (14.6 m) long and 41 ft wide.

Location

Open in Google Maps
CarriesDupont PKY/US13 NB
CrossesBlackbird Creek
LocationNorth of Blackbird
RouteU.S. Route 13
CountyNew Castle County
StateDelaware
Coordinates39.37277, -75.66148
Functional classRural 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.
Superstructure7 GoodSome minor problems.
Substructure6 SatisfactoryStructural elements show some minor deterioration.
Channel and channel protection5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Last inspectionJune 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourScour critical; foundations unstable for calculated scour conditions
Structural evaluation6: Equal to present minimum criteria
Deck geometry6: Equal to present minimum criteria
Waterway adequacy6: Equal to present minimum criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating38.3 US tons
Inventory rating29.3 US tons

Structure

Structure typeSlab
MaterialConcrete
DeckConcrete, cast-in-place
Main spans2
Design loadH 20
Structure length48 ft (14.6 m)
Longest span20 ft (6.1 m)
Deck width41 ft (12.5 m)
Roadway width37 ft (11.3 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic11,021 (2023)
Projected traffic11,764 by 2042
Trucks12%
Lanes on structure2
Traffic directionOne-way traffic
CarriesHighway
CrossesWaterway
Detour if closed—
TollOn a free road
National Highway SystemNo

Ownership and planned work

OwnerState Highway Agency
Maintained byState Highway Agency
Historic statusEligible for the National Register of Historic Places
Work proposedNone recorded
Estimated improvement cost—
NavigationNo navigation control on waterway

Frequently asked questions

When was Dupont PKY/US13 NB over Blackbird Creek built?

It was built in 1933, making it 92 years old in 2025.

What condition is Dupont PKY/US13 NB over Blackbird 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 June 2024.

How much traffic does Dupont PKY/US13 NB over Blackbird Creek carry?

About 11,021 vehicles per day (2023 count), of which roughly 12% are trucks.

How long is Dupont PKY/US13 NB over Blackbird Creek?

The structure is 48 ft (14.6 m) long with a longest span of 20 ft (6.1 m) and a deck 41 ft wide.

Who owns Dupont PKY/US13 NB over Blackbird Creek?

It is owned by the State Highway Agency.