US Bridges

I 495 NB over SR9

Fair

New Castle County, Delaware · South of Wilmington · Structure no. 1811 060

Built
1972
53 years old
Condition
Fair
inspected May 2022
Type
Stringer/Multi-beam or Girder
Steel
Length
324 ft
4 main spans
Daily traffic
43,998
2021 count
Owner
State
State Highway Agency

About this bridge

I 495 NB over SR9 is a steel stringer/multi-beam or girder carrying I 495 NB over SR9 in New Castle County, Delaware. It was built in 1972, so it is 53 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 43,998 vehicles a day, roughly 8% of them trucks, projected to reach 64,593 by 2042. The structure is 324 ft (98.8 m) long and 57 ft wide.

Location

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CarriesI 495 NB
CrossesSR9
LocationSouth of Wilmington
RouteInterstate 495
CountyNew Castle County
StateDelaware
Coordinates39.71734, -75.54641
Functional classUrban Principal Arterial - Interstate

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.
Last inspectionMay 2022
Inspection intervalevery 48 months
Operating statusOpen, no restriction
ScourBridge not over waterway
Structural evaluation6: Equal to present minimum criteria
Deck geometry6: Equal to present minimum criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating46.7 US tons
Inventory rating36 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialSteel
DeckConcrete, cast-in-place
Main spans4
Design loadHS 20 + Mod
Structure length324 ft (98.8 m)
Longest span117 ft (35.6 m)
Deck width57 ft (17.3 m)
Roadway width53 ft (16.2 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic43,998 (2021)
Projected traffic64,593 by 2042
Trucks8%
Lanes on structure3
Traffic directionOne-way traffic
CarriesHighway
CrossesHighway
Detour if closed—
TollOn a free road
National Highway SystemYes
Strategic Highway NetworkInterstate STRAHNET route

Ownership and planned work

OwnerState Highway Agency
Maintained byState Highway Agency
Historic statusNot eligible for the National Register of Historic Places
Work proposedReplacement because of substandard load-carrying capacity or roadway geometry
Estimated improvement cost$1 million
NavigationNot applicable (no waterway)

Frequently asked questions

When was I 495 NB over SR9 built?

It was built in 1972, making it 53 years old in 2025.

What condition is I 495 NB over SR9 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 May 2022.

How much traffic does I 495 NB over SR9 carry?

About 43,998 vehicles per day (2021 count), of which roughly 8% are trucks.

How long is I 495 NB over SR9?

The structure is 324 ft (98.8 m) long with a longest span of 117 ft (35.6 m) and a deck 57 ft wide.

Who owns I 495 NB over SR9?

It is owned by the State Highway Agency.