US Bridges

I 94 over Armells Cr-Rr

Fair

Rosebud County, Montana · 6M W Forsyth · Structure no. I00094088+00982

Built
1972
53 years old
Condition
Fair
inspected February 2024
Type
Stringer/Multi-beam or Girder
Prestressed Concrete
Length
414 ft
6 main spans
Daily traffic
2,166
2023 count
Owner
State
State Highway Agency

About this bridge

I 94 over Armells Cr-Rr is a prestressed concrete stringer/multi-beam or girder carrying I 94 over Armells Cr-Rr in Rosebud County, Montana. It was built in 1972, so it is 53 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 2,166 vehicles a day, roughly 29% of them trucks, projected to reach 2,274 by 2043. The structure is 414 ft (126.2 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
CrossesArmells Cr-Rr
Location6M W Forsyth
RouteInterstate 94
CountyRosebud County
StateMontana
Coordinates46.25068, -106.80624
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.
Superstructure7 GoodSome minor problems.
Substructure6 SatisfactoryStructural elements show some minor deterioration.
Channel and channel protection7 GoodSome minor problems.
Last inspectionFebruary 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour within limits of footing or piles
Structural evaluation6: Equal to present minimum criteria
Deck geometry7: Better than present minimum criteria
Waterway adequacy8: Equal to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating48 US tons
Inventory rating27 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialPrestressed Concrete
DeckConcrete, cast-in-place
Main spans6
Design loadHS 20
Structure length414 ft (126.2 m)
Longest span75 ft (22.9 m)
Deck width44 ft (13.5 m)
Roadway width41 ft (12.6 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic2,166 (2023)
Projected traffic2,274 by 2043
Trucks29%
Lanes on structure2
Traffic directionOne-way traffic
CarriesHighway
CrossesRailroad and waterway
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—
NavigationNo navigation control on waterway

Frequently asked questions

When was I 94 over Armells Cr-Rr built?

It was built in 1972, making it 53 years old in 2025.

What condition is I 94 over Armells Cr-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 February 2024.

How much traffic does I 94 over Armells Cr-Rr carry?

About 2,166 vehicles per day (2023 count), of which roughly 29% are trucks.

How long is I 94 over Armells Cr-Rr?

The structure is 414 ft (126.2 m) long with a longest span of 75 ft (22.9 m) and a deck 44 ft wide.

Who owns I 94 over Armells Cr-Rr?

It is owned by the State Highway Agency.