US Bridges

Central Ave over Belt Creek 084

FairPosted for load

Cascade County, Montana · Armington · Structure no. L07237000+04001

Built
1938
87 years old
Condition
Fair
inspected January 2025
Type
Stringer/Multi-beam or Girder
Wood or Timber
Length
155 ft
6 main spans
Daily traffic
155
2023 count
Owner
County
County Highway Agency

About this bridge

Central Ave over Belt Creek 084 is a wood or timber stringer/multi-beam or girder carrying Central Ave over Belt Creek 084 in Cascade County, Montana. It was built in 1938, so it is 87 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. Its operating status is: posted for load restriction.

It carries about 155 vehicles a day, roughly 3% of them trucks, projected to reach 164 by 2043. The structure is 155 ft (47.2 m) long and 22 ft wide. If it were closed, the detour would be 3.1 mi (5 km).

Location

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CarriesCentral Ave
CrossesBelt Creek 084
LocationArmington
RouteCounty Highway 7237
CountyCascade County
StateMontana
Coordinates47.36551, -110.90639
Functional classRural Local

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.
Superstructure6 SatisfactoryStructural elements show some minor deterioration.
Substructure6 SatisfactoryStructural elements show some minor deterioration.
Channel and channel protection6 SatisfactoryStructural elements show some minor deterioration.
Last inspectionJanuary 2025
Inspection intervalevery 24 months
Operating statusPosted for load 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 alignment7: Better than present minimum criteria
Operating rating25 US tons
Inventory rating19 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialWood or Timber
DeckWood or timber
Main spans6
Design loadUnknown
Structure length155 ft (47.2 m)
Longest span27 ft (8.2 m)
Deck width22 ft (6.7 m)
Roadway width21 ft (6.3 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic155 (2023)
Projected traffic164 by 2043
Trucks3%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed3.1 mi (5 km)
TollOn a free road
National Highway SystemNo

Ownership and planned work

OwnerCounty Highway Agency
Maintained byCounty 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 Central Ave over Belt Creek 084 built?

It was built in 1938, making it 87 years old in 2025.

What condition is Central Ave over Belt Creek 084 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 January 2025.

How much traffic does Central Ave over Belt Creek 084 carry?

About 155 vehicles per day (2023 count), of which roughly 3% are trucks.

How long is Central Ave over Belt Creek 084?

The structure is 155 ft (47.2 m) long with a longest span of 27 ft (8.2 m) and a deck 22 ft wide.

Who owns Central Ave over Belt Creek 084?

It is owned by the County Highway Agency.