US Bridges

I 15 over Int Barretts-Rebich LN

Fair

Beaverhead County, Montana · 7.4M S Dillon · Structure no. I00015056+00201

Built
1965
60 years old
Condition
Fair
inspected February 2025
Type
Stringer/Multi-beam or Girder
Prestressed Concrete
Length
123 ft
3 main spans
Daily traffic
2,239
2023 count
Owner
State
State Highway Agency

About this bridge

I 15 over Int Barretts-Rebich LN is a prestressed concrete stringer/multi-beam or girder carrying I 15 over Int Barretts-Rebich LN in Beaverhead County, Montana. It was built in 1965, so it is 60 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 5 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 2,239 vehicles a day, roughly 24% of them trucks, projected to reach 2,395 by 2042. The structure is 123 ft (37.5 m) long and 47 ft wide.

CarriesI 15
CrossesInt Barretts-Rebich LN
Location7.4M S Dillon
RouteInterstate 15
StateMontana
Coordinates45.13682, -112.73717
Functional classRural Principal Arterial - Interstate

Condition and inspection

Fair

The lowest-rated primary component is rated 5 or 6. Minor deterioration is present but the structure is sound.

ComponentRatingMeaning
Deck5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Superstructure6 SatisfactoryStructural elements show some minor deterioration.
Substructure6 SatisfactoryStructural elements show some minor deterioration.
Last inspectionFebruary 2025
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourBridge not over waterway
Structural evaluation6: Equal to present minimum criteria
Deck geometry9: Superior to present desirable criteria
Approach roadway alignment7: Better than present minimum criteria
Operating rating55 US tons
Inventory rating37 US tons

Structure

MaterialPrestressed Concrete
DeckConcrete, cast-in-place
Main spans3
Design loadHS 20
Structure length123 ft (37.5 m)
Longest span50 ft (15.2 m)
Deck width47 ft (14.3 m)
Roadway width43 ft (13 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic2,239 (2023)
Projected traffic2,395 by 2042
Trucks24%
Lanes on structure2
Traffic directionOne-way traffic
CarriesOverpass structure at an interchange
CrossesHighway
Detour if closed—
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—
NavigationNot applicable (no waterway)

Frequently asked questions

When was I 15 over Int Barretts-Rebich LN built?

It was built in 1965, making it 60 years old in 2025.

What condition is I 15 over Int Barretts-Rebich LN 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 February 2025.

How much traffic does I 15 over Int Barretts-Rebich LN carry?

About 2,239 vehicles per day (2023 count), of which roughly 24% are trucks.

How long is I 15 over Int Barretts-Rebich LN?

The structure is 123 ft (37.5 m) long with a longest span of 50 ft (15.2 m) and a deck 47 ft wide.

Who owns I 15 over Int Barretts-Rebich LN?

It is owned by the State Highway Agency.