US Bridges

High Bridge RD over Beaverhead River 125

Fair

Beaverhead County, Montana · 5M N Clark Canyon Dam · Structure no. L01196005+04901

Built
1980
45 years old
Condition
Fair
inspected November 2023
Type
Stringer/Multi-beam or Girder
Prestressed Concrete
Length
154 ft
3 main spans
Daily traffic
100
2025 count
Owner
State
State Highway Agency

About this bridge

High Bridge RD over Beaverhead River 125 is a prestressed concrete stringer/multi-beam or girder carrying High Bridge RD over Beaverhead River 125 in Beaverhead County, Montana. It was built in 1980, so it is 45 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 100 vehicles a day, roughly 3% of them trucks, projected to reach 100 by 2040. The structure is 154 ft (46.9 m) long and 30 ft wide. If it were closed, the detour would be 14.3 mi (23 km).

Location

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CarriesHigh Bridge RD
CrossesBeaverhead River 125
Location5M N Clark Canyon Dam
RouteState Highway 196
CountyBeaverhead County
StateMontana
Coordinates45.06588, -112.80118
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.
Superstructure7 GoodSome minor problems.
Substructure6 SatisfactoryStructural elements show some minor deterioration.
Channel and channel protection7 GoodSome minor problems.
Last inspectionNovember 2023
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 geometry6: Equal to present minimum criteria
Waterway adequacy7: Better than present minimum criteria
Approach roadway alignment7: Better than present minimum criteria
Operating rating53 US tons
Inventory rating30 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialPrestressed Concrete
DeckConcrete, cast-in-place
Main spans3
Design loadHS 20
Structure length154 ft (46.9 m)
Longest span60 ft (18.3 m)
Deck width30 ft (9.2 m)
Roadway width27 ft (8.3 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic100 (2025)
Projected traffic100 by 2040
Trucks3%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed14.3 mi (23 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 High Bridge RD over Beaverhead River 125 built?

It was built in 1980, making it 45 years old in 2025.

What condition is High Bridge RD over Beaverhead River 125 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 High Bridge RD over Beaverhead River 125 carry?

About 100 vehicles per day (2025 count), of which roughly 3% are trucks.

How long is High Bridge RD over Beaverhead River 125?

The structure is 154 ft (46.9 m) long with a longest span of 60 ft (18.3 m) and a deck 30 ft wide.

Who owns High Bridge RD over Beaverhead River 125?

It is owned by the State Highway Agency.