US Bridges

I 495 NB over 84" Sewer Pipe

Good

New Castle County, Delaware · Wilmington · Structure no. 1817N060

Built
1976
49 years old
Condition
Good
inspected March 2022
Type
Slab
Concrete
Length
102 ft
3 main spans
Daily traffic
35,603
2020 count
Owner
State
State Highway Agency

About this bridge

I 495 NB over 84" Sewer Pipe is a concrete slab carrying I 495 NB over 84" Sewer Pipe 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 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 35,603 vehicles a day, roughly 9% of them trucks, projected to reach 55,762 by 2042. The structure is 102 ft (31.1 m) long and 54 ft wide.

Location

Open in Google Maps
CarriesI 495 NB
Crosses84" Sewer Pipe
LocationWilmington
RouteInterstate 495
CountyNew Castle County
StateDelaware
Coordinates39.73664, -75.52052
Functional classUrban Principal Arterial - Interstate

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.
Substructure8 Very GoodNo problems noted.
Channel and channel protection8 Very GoodNo problems noted.
Last inspectionMarch 2022
Inspection intervalevery 48 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation7: Better than present minimum criteria
Deck geometry5: Somewhat better than minimum adequacy to tolerate being left in place as is
Waterway adequacy9: Superior to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating57.9 US tons
Inventory rating44.6 US tons

Structure

Structure typeSlab
MaterialConcrete
DeckConcrete, cast-in-place
Main spans3
Design loadHS 20
Structure length102 ft (31.1 m)
Longest span40 ft (12.2 m)
Deck width54 ft (16.5 m)
Roadway width51 ft (15.4 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic35,603 (2020)
Projected traffic55,762 by 2042
Trucks9%
Lanes on structure3
Traffic directionOne-way traffic
CarriesHighway
CrossesWaterway
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
NavigationNo navigation control on waterway

Frequently asked questions

When was I 495 NB over 84" Sewer Pipe built?

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

What condition is I 495 NB over 84" Sewer Pipe 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 March 2022.

How much traffic does I 495 NB over 84" Sewer Pipe carry?

About 35,603 vehicles per day (2020 count), of which roughly 9% are trucks.

How long is I 495 NB over 84" Sewer Pipe?

The structure is 102 ft (31.1 m) long with a longest span of 40 ft (12.2 m) and a deck 54 ft wide.

Who owns I 495 NB over 84" Sewer Pipe?

It is owned by the State Highway Agency.