US Bridges

I 94 over Armells Cr-Rr

Good

Rosebud County, Montana · 6M W Forsyth · Structure no. I00094088+00981

Built
1967
58 years old
Condition
Good
inspected February 2024
Type
Stringer/Multi-beam or Girder
Prestressed Concrete
Length
395 ft
7 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 1967, so it is 58 years old, older than the Montana average of 47 years.

The most recent inspection reported to the Federal Highway Administration rates it in good condition with a lowest component rating of 7 out of 9. All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted.

It carries about 2,166 vehicles a day, roughly 29% of them trucks, projected to reach 2,274 by 2043. The structure is 395 ft (120.5 m) long and 35 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
Coordinates46.2504, -106.80618
Functional classRural Principal Arterial - Interstate

Condition and inspection

Good

All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted.

ComponentRatingMeaning
Deck7 GoodSome minor problems.
Superstructure8 Very GoodNo problems noted.
Substructure7 GoodSome minor problems.
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 evaluation5: Somewhat better than minimum adequacy to tolerate being left in place as is
Deck geometry4: Meets minimum tolerable limits to be left in place as is
Waterway adequacy8: Equal to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating52 US tons
Inventory rating25 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialPrestressed Concrete
DeckConcrete, cast-in-place
Main spans7
Design loadHS 20
Structure length395 ft (120.5 m)
Longest span72 ft (21.8 m)
Deck width35 ft (10.7 m)
Roadway width30 ft (9.1 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 1967, making it 58 years old in 2025.

What condition is I 94 over Armells Cr-Rr in?

The National Bridge Inventory rates it in good condition. All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted. 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 395 ft (120.5 m) long with a longest span of 72 ft (21.8 m) and a deck 35 ft wide.

Who owns I 94 over Armells Cr-Rr?

It is owned by the State Highway Agency.