US Bridges

I-25 Nbl over US 20 / 26 Connector

Fair

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

Built
1984
41 years old
Condition
Fair
inspected April 2024
Type
Stringer/Multi-beam or Girder
Steel Continuous
Length
226 ft
3 main spans
Daily traffic
7,648
2024 count
Owner
State
State Highway Agency

About this bridge

I-25 Nbl over US 20 / 26 Connector is a steel continuous stringer/multi-beam or girder carrying I-25 Nbl over US 20 / 26 Connector in Natrona County, Wyoming. It was built in 1984, so it is 41 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 7,648 vehicles a day, roughly 13% of them trucks, projected to reach 10,707 by 2043. The structure is 226 ft (68.9 m) long and 45 ft wide.

Location

Open in Google Maps
CarriesI-25 Nbl
CrossesUS 20 / 26 Connector
LocationCasper Marginal
RouteInterstate 25
CountyNatrona County
StateWyoming
Coordinates42.86709, -106.34511
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 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourBridge not over waterway
Structural evaluation6: Equal to present minimum criteria
Deck geometry8: Equal to present desirable criteria
Approach roadway alignment6: Equal to present minimum criteria
Operating rating99 US tons
Inventory rating64 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialSteel Continuous
DeckConcrete, cast-in-place
Main spans3
Design loadHS 20 + Mod
Structure length226 ft (68.9 m)
Longest span142 ft (43.3 m)
Deck width45 ft (13.7 m)
Roadway width42 ft (12.8 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic7,648 (2024)
Projected traffic10,707 by 2043
Trucks13%
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 statusNot eligible for the National Register of Historic Places
Work proposedNone recorded
Estimated improvement cost—
NavigationNot applicable (no waterway)

Frequently asked questions

When was I-25 Nbl over US 20 / 26 Connector built?

It was built in 1984, making it 41 years old in 2025.

What condition is I-25 Nbl over US 20 / 26 Connector 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 US 20 / 26 Connector carry?

About 7,648 vehicles per day (2024 count), of which roughly 13% are trucks.

How long is I-25 Nbl over US 20 / 26 Connector?

The structure is 226 ft (68.9 m) long with a longest span of 142 ft (43.3 m) and a deck 45 ft wide.

Who owns I-25 Nbl over US 20 / 26 Connector?

It is owned by the State Highway Agency.