US Bridges

I-180 Nbl and Sbl over Deming Drive

Fair

Laramie County, Wyoming · Cheyenne Central Ave · Structure no. DER

Built
1980
45 years old
Condition
Fair
inspected April 2023
Type
Stringer/Multi-beam or Girder
Steel
Length
175 ft
1 main span
Daily traffic
21,146
2024 count
Owner
State
State Highway Agency

About this bridge

I-180 Nbl and Sbl over Deming Drive is a steel stringer/multi-beam or girder carrying I-180 Nbl and Sbl over Deming Drive in Laramie County, Wyoming. It was built in 1980, so it is 45 years old, younger than the Wyoming average of 48.4 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 21,146 vehicles a day, roughly 4% of them trucks, projected to reach 29,604 by 2043. The structure is 175 ft (53.3 m) long and 95 ft wide. If it were closed, the detour would be 1.2 mi (2 km).

Location

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CarriesI-180 Nbl and Sbl
CrossesDeming Drive
LocationCheyenne Central Ave
RouteInterstate 180
CountyLaramie County
StateWyoming
Coordinates41.12101, -104.80595
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.
Superstructure7 GoodSome minor problems.
Substructure6 SatisfactoryStructural elements show some minor deterioration.
Last inspectionApril 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourBridge not over waterway
Structural evaluation6: Equal to present minimum criteria
Deck geometry9: Superior to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating83.9 US tons
Inventory rating48.3 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialSteel
DeckConcrete, cast-in-place
Main spans1 (+2 approach)
Design loadHS 20 + Mod
Structure length175 ft (53.3 m)
Longest span90 ft (27.4 m)
Deck width95 ft (28.9 m)
Roadway width92 ft (28 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic21,146 (2024)
Projected traffic29,604 by 2043
Trucks4%
Lanes on structure4
Traffic directionTwo-way traffic
CarriesHighway
CrossesHighway
Detour if closed1.2 mi (2 km)
TollOn a free road
National Highway SystemYes

Ownership and planned work

OwnerState Highway Agency
Maintained byState Highway Agency
Historic statusHistorical significance not determinable at this time
Work proposedNone recorded
Estimated improvement cost—
NavigationNot applicable (no waterway)

Frequently asked questions

When was I-180 Nbl and Sbl over Deming Drive built?

It was built in 1980, making it 45 years old in 2025.

What condition is I-180 Nbl and Sbl over Deming Drive 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 April 2023.

How much traffic does I-180 Nbl and Sbl over Deming Drive carry?

About 21,146 vehicles per day (2024 count), of which roughly 4% are trucks.

How long is I-180 Nbl and Sbl over Deming Drive?

The structure is 175 ft (53.3 m) long with a longest span of 90 ft (27.4 m) and a deck 95 ft wide.

Who owns I-180 Nbl and Sbl over Deming Drive?

It is owned by the State Highway Agency.