US Bridges

I-25 Nbl over I-80

Poor

Laramie County, Wyoming · Cheyenne Marginal · Structure no. AAR

Built
1963
62 years old
Condition
Poor
inspected April 2023
Type
Stringer/Multi-beam or Girder
Steel Continuous
Length
172 ft
2 main spans
Daily traffic
11,096
2024 count
Owner
State
State Highway Agency

About this bridge

I-25 Nbl over I-80 is a steel continuous stringer/multi-beam or girder carrying I-25 Nbl over I-80 in Laramie County, Wyoming. It was built in 1963, so it is 62 years old, older than the Wyoming average of 48.4 years.

The most recent inspection reported to the Federal Highway Administration rates it in poor condition with a lowest component rating of 4 out of 9. The lowest-rated primary component is rated 4 or below, indicating advanced deterioration. Poor does not mean unsafe; such bridges are inspected more often and may carry load restrictions.

It carries about 11,096 vehicles a day, roughly 19% of them trucks, projected to reach 15,534 by 2043. The structure is 172 ft (52.4 m) long and 45 ft wide. If it were closed, the detour would be 1.2 mi (2 km).

Location

Open in Google Maps
CarriesI-25 Nbl
CrossesI-80
LocationCheyenne Marginal
RouteInterstate 25
CountyLaramie County
StateWyoming
Coordinates41.11363, -104.85072
Functional classUrban Principal Arterial - Interstate

Condition and inspection

Poor

The lowest-rated primary component is rated 4 or below, indicating advanced deterioration. Poor does not mean unsafe; such bridges are inspected more often and may carry load restrictions.

ComponentRatingMeaning
Deck4 PoorAdvanced section loss, deterioration, spalling or scour.
Superstructure6 SatisfactoryStructural elements show some minor deterioration.
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 geometry2: Basically intolerable, requiring high priority of replacement
Approach roadway alignment8: Equal to present desirable criteria
Operating rating63.7 US tons
Inventory rating38.3 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialSteel Continuous
DeckConcrete, cast-in-place
Main spans2
Design loadHS 20 + Mod
Structure length172 ft (52.4 m)
Longest span84 ft (25.6 m)
Deck width45 ft (13.7 m)
Roadway width42 ft (12.8 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic11,096 (2024)
Projected traffic15,534 by 2043
Trucks19%
Lanes on structure3
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 I-80 built?

It was built in 1963, making it 62 years old in 2025.

What condition is I-25 Nbl over I-80 in?

The National Bridge Inventory rates it in poor condition. The lowest-rated primary component is rated 4 or below, indicating advanced deterioration. Poor does not mean unsafe; such bridges are inspected more often and may carry load restrictions. The last reported inspection was in April 2023.

How much traffic does I-25 Nbl over I-80 carry?

About 11,096 vehicles per day (2024 count), of which roughly 19% are trucks.

How long is I-25 Nbl over I-80?

The structure is 172 ft (52.4 m) long with a longest span of 84 ft (25.6 m) and a deck 45 ft wide.

Who owns I-25 Nbl over I-80?

It is owned by the State Highway Agency.