US Bridges

US 89 FH 32 over Belt Creek

Fair

Cascade County, Montana · 1M SE Neihart · Structure no. P00060034+08971

Built
2001
24 years old
Condition
Fair
inspected May 2023
Type
Stringer/Multi-beam or Girder
Prestressed Concrete
Length
97 ft
1 main span
Daily traffic
387
2023 count
Owner
State
State Highway Agency

About this bridge

US 89 FH 32 over Belt Creek is a prestressed concrete stringer/multi-beam or girder carrying US 89 FH 32 over Belt Creek in Cascade County, Montana. It was built in 2001, so it is 24 years old, younger 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 387 vehicles a day, roughly 11% of them trucks, projected to reach 406 by 2043. The structure is 97 ft (29.7 m) long and 32 ft wide. If it were closed, the detour would be 123.7 mi (199 km).

Location

Open in Google Maps
CarriesUS 89 FH 32
CrossesBelt Creek
Location1M SE Neihart
RouteU.S. Route 89
CountyCascade County
StateMontana
Coordinates46.91278, -110.699
Functional classRural Minor Arterial

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.
Superstructure8 Very GoodNo problems noted.
Substructure8 Very GoodNo problems noted.
Channel and channel protection8 Very GoodNo problems noted.
Last inspectionMay 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation8: Equal to present desirable criteria
Deck geometry6: Equal to present minimum criteria
Waterway adequacy8: Equal to present desirable criteria
Approach roadway alignment7: Better than present minimum criteria
Operating rating57 US tons
Inventory rating36 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialPrestressed Concrete
DeckConcrete, cast-in-place
Main spans1
Design loadHS 20
Structure length97 ft (29.7 m)
Longest span97 ft (29.7 m)
Deck width32 ft (9.7 m)
Roadway width29 ft (8.7 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic387 (2023)
Projected traffic406 by 2043
Trucks11%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed123.7 mi (199 km)
TollOn a free road
National Highway SystemNo

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 US 89 FH 32 over Belt Creek built?

It was built in 2001, making it 24 years old in 2025.

What condition is US 89 FH 32 over Belt Creek 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 May 2023.

How much traffic does US 89 FH 32 over Belt Creek carry?

About 387 vehicles per day (2023 count), of which roughly 11% are trucks.

How long is US 89 FH 32 over Belt Creek?

The structure is 97 ft (29.7 m) long with a longest span of 97 ft (29.7 m) and a deck 32 ft wide.

Who owns US 89 FH 32 over Belt Creek?

It is owned by the State Highway Agency.