US Bridges

I680 over Abnd CNWTC/N36

Fair

Douglas County, Nebraska · US75 Intrchg 1W · Structure no. S680 01150L

Built
1972
53 years old, rebuilt 1994
Condition
Fair
inspected March 2023
Type
Stringer/Multi-beam or Girder
Prestressed Concrete Continuous
Length
358 ft
6 main spans
Daily traffic
31,775
2018 count
Owner
State
State Highway Agency

About this bridge

I680 over Abnd CNWTC/N36 is a prestressed concrete continuous stringer/multi-beam or girder carrying I680 over Abnd CNWTC/N36 in Douglas County, Nebraska. It was built in 1972 and reconstructed in 1994, so it is 53 years old, older than the Nebraska average of 47.1 years.

The most recent inspection reported to the Federal Highway Administration rates it in fair condition with a lowest component rating of 5 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 31,775 vehicles a day, roughly 6% of them trucks, projected to reach 31,775 by 2038. The structure is 358 ft (109.1 m) long and 41 ft wide. If it were closed, the detour would be 12.4 mi (20 km).

Location

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CarriesI680
CrossesAbnd CNWTC/N36
LocationUS75 Intrchg 1W
RouteInterstate 680
CountyDouglas County
StateNebraska
Coordinates41.347, -95.9938
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
Deck6 SatisfactoryStructural elements show some minor deterioration.
Superstructure5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Substructure7 GoodSome minor problems.
Last inspectionMarch 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourBridge not over waterway
Structural evaluation5: Somewhat better than minimum adequacy to tolerate being left in place as is
Deck geometry6: Equal to present minimum criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating69.4 US tons
Inventory rating36.4 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialPrestressed Concrete Continuous
DeckConcrete, cast-in-place
Main spans6
Design loadHS 20
Structure length358 ft (109.1 m)
Longest span65 ft (19.8 m)
Deck width41 ft (12.4 m)
Roadway width38 ft (11.6 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic31,775 (2018)
Projected traffic31,775 by 2038
Trucks6%
Lanes on structure2
Traffic directionOne-way traffic
CarriesHighway
CrossesHighway
Detour if closed12.4 mi (20 km)
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 proposedWidening with deck rehabilitation or replacement
Estimated improvement cost—
NavigationNot applicable (no waterway)

Frequently asked questions

When was I680 over Abnd CNWTC/N36 built?

It was built in 1972, making it 53 years old in 2025. It was reconstructed in 1994.

What condition is I680 over Abnd CNWTC/N36 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 March 2023.

How much traffic does I680 over Abnd CNWTC/N36 carry?

About 31,775 vehicles per day (2018 count), of which roughly 6% are trucks.

How long is I680 over Abnd CNWTC/N36?

The structure is 358 ft (109.1 m) long with a longest span of 65 ft (19.8 m) and a deck 41 ft wide.

Who owns I680 over Abnd CNWTC/N36?

It is owned by the State Highway Agency.