US Bridges

I 94 over S 25th RD

Fair

Yellowstone County, Montana · 3.7M W Pompeys Pillar · Structure no. I00094019+05761

Built
1968
57 years old
Condition
Fair
inspected October 2023
Type
Stringer/Multi-beam or Girder
Prestressed Concrete
Length
129 ft
3 main spans
Daily traffic
2,611
2023 count
Owner
State
State Highway Agency

About this bridge

I 94 over S 25th RD is a prestressed concrete stringer/multi-beam or girder carrying I 94 over S 25th RD in Yellowstone County, Montana. It was built in 1968, so it is 57 years old, older than the Montana average of 47 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 2,611 vehicles a day, roughly 26% of them trucks, projected to reach 2,741 by 2043. The structure is 129 ft (39.3 m) long and 41 ft wide. If it were closed, the detour would be 1.2 mi (2 km).

Location

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CarriesI 94
CrossesS 25th RD
Location3.7M W Pompeys Pillar
RouteInterstate 94
CountyYellowstone County
StateMontana
Coordinates45.96407, -108.05911
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
Deck7 GoodSome minor problems.
Superstructure7 GoodSome minor problems.
Substructure6 SatisfactoryStructural elements show some minor deterioration.
Last inspectionOctober 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourBridge not over waterway
Structural evaluation6: Equal to present minimum criteria
Deck geometry6: Equal to present minimum criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating61.9 US tons
Inventory rating43 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialPrestressed Concrete
DeckConcrete, cast-in-place
Main spans3
Design loadHS 20
Structure length129 ft (39.3 m)
Longest span47 ft (14.3 m)
Deck width41 ft (12.5 m)
Roadway width38 ft (11.6 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic2,611 (2023)
Projected traffic2,741 by 2043
Trucks26%
Lanes on structure2
Traffic directionOne-way traffic
CarriesHighway
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 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 94 over S 25th RD built?

It was built in 1968, making it 57 years old in 2025.

What condition is I 94 over S 25th 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 October 2023.

How much traffic does I 94 over S 25th RD carry?

About 2,611 vehicles per day (2023 count), of which roughly 26% are trucks.

How long is I 94 over S 25th RD?

The structure is 129 ft (39.3 m) long with a longest span of 47 ft (14.3 m) and a deck 41 ft wide.

Who owns I 94 over S 25th RD?

It is owned by the State Highway Agency.