US Bridges

I-25 Nbl over North Mckinley Street

Fair

Natrona County, Wyoming · Casper Marginal · Structure no. AIF

Built
1958
67 years old, rebuilt 1987
Condition
Fair
inspected June 2024
Type
Stringer/Multi-beam or Girder
Steel Continuous
Length
165 ft
4 main spans
Daily traffic
12,577
2024 count
Owner
State
State Highway Agency

About this bridge

I-25 Nbl over North Mckinley Street is a steel continuous stringer/multi-beam or girder carrying I-25 Nbl over North Mckinley Street in Natrona County, Wyoming. It was built in 1958 and reconstructed in 1987, 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 12,577 vehicles a day, roughly 8% of them trucks, projected to reach 17,608 by 2043. The structure is 165 ft (50.3 m) long and 38 ft wide.

CarriesI-25 Nbl
CrossesNorth Mckinley Street
LocationCasper Marginal
RouteInterstate 25
StateWyoming
Coordinates42.85702, -106.31191
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.
Superstructure6 SatisfactoryStructural elements show some minor deterioration.
Substructure6 SatisfactoryStructural elements show some minor deterioration.
Last inspectionJune 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourBridge not over waterway
Structural evaluation6: Equal to present minimum criteria
Deck geometry4: Meets minimum tolerable limits to be left in place as is
Approach roadway alignment8: Equal to present desirable criteria
Operating rating56.2 US tons
Inventory rating33.8 US tons

Structure

MaterialSteel Continuous
DeckConcrete, cast-in-place
Main spans4
Design loadHS 20 + Mod
Structure length165 ft (50.3 m)
Longest span47 ft (14.3 m)
Deck width38 ft (11.6 m)
Roadway width35 ft (10.7 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic12,577 (2024)
Projected traffic17,608 by 2043
Trucks8%
Lanes on structure2
Traffic directionOne-way traffic
CarriesOverpass structure at an interchange
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 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 North Mckinley Street built?

It was built in 1958, making it 67 years old in 2025. It was reconstructed in 1987.

What condition is I-25 Nbl over North Mckinley Street 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 June 2024.

How much traffic does I-25 Nbl over North Mckinley Street carry?

About 12,577 vehicles per day (2024 count), of which roughly 8% are trucks.

How long is I-25 Nbl over North Mckinley Street?

The structure is 165 ft (50.3 m) long with a longest span of 47 ft (14.3 m) and a deck 38 ft wide.

Who owns I-25 Nbl over North Mckinley Street?

It is owned by the State Highway Agency.