US Bridges

Bond RD over Sep I 15 12

Fair

Beaverhead County, Montana · 7M N Dillon · Structure no. L01316006+05001

Built
1973
52 years old
Condition
Fair
inspected October 2024
Type
Stringer/Multi-beam or Girder
Prestressed Concrete
Length
313 ft
4 main spans
Daily traffic
54
2023 count
Owner
State
State Highway Agency

About this bridge

Bond RD over Sep I 15 12 is a prestressed concrete stringer/multi-beam or girder carrying Bond RD over Sep I 15 12 in Beaverhead County, Montana. It was built in 1973, so it is 52 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 54 vehicles a day, roughly 3% of them trucks, projected to reach 58 by 2043. The structure is 313 ft (95.4 m) long and 32 ft wide. If it were closed, the detour would be 1.2 mi (2 km).

Location

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CarriesBond RD
CrossesSep I 15 12
Location7M N Dillon
RouteCounty Highway 1316
CountyBeaverhead County
StateMontana
Coordinates45.30543, -112.6757
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
Deck6 SatisfactoryStructural elements show some minor deterioration.
Superstructure7 GoodSome minor problems.
Substructure6 SatisfactoryStructural elements show some minor deterioration.
Last inspectionOctober 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourBridge not over waterway
Structural evaluation6: Equal to present minimum criteria
Deck geometry7: Better than present minimum criteria
Approach roadway alignment7: Better than present minimum criteria
Operating rating65 US tons
Inventory rating30 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialPrestressed Concrete
DeckConcrete, cast-in-place
Main spans4
Design loadHS 20
Structure length313 ft (95.4 m)
Longest span100 ft (30.5 m)
Deck width32 ft (9.8 m)
Roadway width30 ft (9 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic54 (2023)
Projected traffic58 by 2043
Trucks3%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesHighway
Detour if closed1.2 mi (2 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—
NavigationNot applicable (no waterway)

Frequently asked questions

When was Bond RD over Sep I 15 12 built?

It was built in 1973, making it 52 years old in 2025.

What condition is Bond RD over Sep I 15 12 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 October 2024.

How much traffic does Bond RD over Sep I 15 12 carry?

About 54 vehicles per day (2023 count), of which roughly 3% are trucks.

How long is Bond RD over Sep I 15 12?

The structure is 313 ft (95.4 m) long with a longest span of 100 ft (30.5 m) and a deck 32 ft wide.

Who owns Bond RD over Sep I 15 12?

It is owned by the State Highway Agency.