US Bridges

I 15 over Int Woodville

Fair

Jefferson County, Montana · 3.1M N Butte · Structure no. I00015134+00391

Built
1976
49 years old
Condition
Fair
inspected December 2024
Type
Stringer/Multi-beam or Girder
Prestressed Concrete
Length
148 ft
3 main spans
Daily traffic
1,576
2023 count
Owner
State
State Highway Agency

About this bridge

I 15 over Int Woodville is a prestressed concrete stringer/multi-beam or girder carrying I 15 over Int Woodville in Jefferson County, Montana. It was built in 1976, so it is 49 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 1,576 vehicles a day, roughly 16% of them trucks, projected to reach 1,701 by 2043. The structure is 148 ft (45.1 m) long and 44 ft wide.

Location

Open in Google Maps
CarriesI 15
CrossesInt Woodville
Location3.1M N Butte
RouteInterstate 15
CountyJefferson County
StateMontana
Coordinates46.04095, -112.45421
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
Deck6 SatisfactoryStructural elements show some minor deterioration.
Superstructure7 GoodSome minor problems.
Substructure6 SatisfactoryStructural elements show some minor deterioration.
Last inspectionDecember 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 alignment8: Equal to present desirable criteria
Operating rating50 US tons
Inventory rating39 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialPrestressed Concrete
DeckConcrete, cast-in-place
Main spans3
Design loadHS 20
Structure length148 ft (45.1 m)
Longest span76 ft (23.3 m)
Deck width44 ft (13.5 m)
Roadway width42 ft (12.7 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic1,576 (2023)
Projected traffic1,701 by 2043
Trucks16%
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 Woodville built?

It was built in 1976, making it 49 years old in 2025.

What condition is I 15 over Int Woodville 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 December 2024.

How much traffic does I 15 over Int Woodville carry?

About 1,576 vehicles per day (2023 count), of which roughly 16% are trucks.

How long is I 15 over Int Woodville?

The structure is 148 ft (45.1 m) long with a longest span of 76 ft (23.3 m) and a deck 44 ft wide.

Who owns I 15 over Int Woodville?

It is owned by the State Highway Agency.