US Bridges

I-25 Nbl over N Antelope Creek RD

Fair

Platte County, Wyoming · Chugwater - Wheatland · Structure no. ADK

Built
1958
67 years old
Condition
Fair
inspected April 2024
Type
Slab
Concrete Continuous
Length
80 ft
3 main spans
Daily traffic
3,514
2024 count
Owner
State
State Highway Agency

About this bridge

I-25 Nbl over N Antelope Creek RD is a concrete continuous slab carrying I-25 Nbl over N Antelope Creek RD in Platte County, Wyoming. It was built in 1958, so it is 67 years old, older 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 3,514 vehicles a day, roughly 22% of them trucks, projected to reach 4,920 by 2043. The structure is 80 ft (24.4 m) long and 43 ft wide. If it were closed, the detour would be 1.2 mi (2 km).

CarriesI-25 Nbl
CrossesN Antelope Creek RD
LocationChugwater - Wheatland
RouteInterstate 25
StateWyoming
Coordinates41.90426, -104.91636
Functional classRural 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.
Superstructure6 SatisfactoryStructural elements show some minor deterioration.
Substructure7 GoodSome minor problems.
Last inspectionApril 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourBridge not over waterway
Structural evaluation6: Equal to present minimum criteria
Deck geometry7: Better than present minimum criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating68.8 US tons
Inventory rating41 US tons

Structure

Structure typeSlab
MaterialConcrete Continuous
DeckConcrete, cast-in-place
Main spans3
Design loadHS 20 + Mod
Structure length80 ft (24.4 m)
Longest span30 ft (9.1 m)
Deck width43 ft (13.1 m)
Roadway width40 ft (12.2 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic3,514 (2024)
Projected traffic4,920 by 2043
Trucks22%
Lanes on structure2
Traffic directionOne-way traffic
CarriesOverpass structure at an interchange
CrossesHighway
Detour if closed1.2 mi (2 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 statusHistorical significance not determinable at this time
Work proposedNone recorded
Estimated improvement cost—
NavigationNot applicable (no waterway)

Frequently asked questions

When was I-25 Nbl over N Antelope Creek RD built?

It was built in 1958, making it 67 years old in 2025.

What condition is I-25 Nbl over N Antelope Creek RD 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 2024.

How much traffic does I-25 Nbl over N Antelope Creek RD carry?

About 3,514 vehicles per day (2024 count), of which roughly 22% are trucks.

How long is I-25 Nbl over N Antelope Creek RD?

The structure is 80 ft (24.4 m) long with a longest span of 30 ft (9.1 m) and a deck 43 ft wide.

Who owns I-25 Nbl over N Antelope Creek RD?

It is owned by the State Highway Agency.