US Bridges

I 94 over RR

Fair

Prairie County, Montana · 3M E Terry · Structure no. I00094179+05172

Built
1969
56 years old
Condition
Fair
inspected November 2023
Type
Stringer/Multi-beam or Girder
Steel
Length
440 ft
2 main spans
Daily traffic
1,939
2023 count
Owner
State
State Highway Agency

About this bridge

I 94 over RR is a steel stringer/multi-beam or girder carrying I 94 over RR in Prairie County, Montana. It was built in 1969, so it is 56 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 1,939 vehicles a day, roughly 28% of them trucks, projected to reach 2,220 by 2043. The structure is 440 ft (134.1 m) long and 44 ft wide. If it were closed, the detour would be 1.2 mi (2 km).

Location

Open in Google Maps
CarriesI 94
CrossesRR
Location3M E Terry
RouteInterstate 94
CountyPrairie County
StateMontana
Coordinates46.79552, -105.24177
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.
Substructure6 SatisfactoryStructural elements show some minor deterioration.
Last inspectionNovember 2023
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 alignment6: Equal to present minimum criteria
Operating rating73 US tons
Inventory rating38 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialSteel
DeckConcrete, cast-in-place
Main spans2 (+4 approach)
Design loadHS 20
Structure length440 ft (134.1 m)
Longest span85 ft (25.8 m)
Deck width44 ft (13.5 m)
Roadway width41 ft (12.6 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic1,939 (2023)
Projected traffic2,220 by 2043
Trucks28%
Lanes on structure2
Traffic directionOne-way traffic
CarriesHighway
CrossesRailroad
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 RR built?

It was built in 1969, making it 56 years old in 2025.

What condition is I 94 over RR 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 November 2023.

How much traffic does I 94 over RR carry?

About 1,939 vehicles per day (2023 count), of which roughly 28% are trucks.

How long is I 94 over RR?

The structure is 440 ft (134.1 m) long with a longest span of 85 ft (25.8 m) and a deck 44 ft wide.

Who owns I 94 over RR?

It is owned by the State Highway Agency.