US Bridges

S 67 over Int N Shelby I 15

Fair

Toole County, Montana · 1M N Shelby · Structure no. P00067001+07541

Built
1960
65 years old
Condition
Fair
inspected May 2024
Type
Stringer/Multi-beam or Girder
Steel
Length
281 ft
4 main spans
Daily traffic
100
2025 count
Owner
State
State Highway Agency

About this bridge

S 67 over Int N Shelby I 15 is a steel stringer/multi-beam or girder carrying S 67 over Int N Shelby I 15 in Toole County, Montana. It was built in 1960, so it is 65 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 100 vehicles a day, roughly 3% of them trucks, projected to reach 100 by 2040. The structure is 281 ft (85.6 m) long and 32 ft wide.

CarriesS 67
CrossesInt N Shelby I 15
Location1M N Shelby
RouteState Highway 51036
StateMontana
Coordinates48.53036, -111.86122
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.
Superstructure6 SatisfactoryStructural elements show some minor deterioration.
Substructure7 GoodSome minor problems.
Last inspectionMay 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 rating39.7 US tons
Inventory rating29.7 US tons

Structure

MaterialSteel
DeckConcrete, cast-in-place
Main spans4
Design loadHS 20
Structure length281 ft (85.6 m)
Longest span80 ft (24.5 m)
Deck width32 ft (9.7 m)
Roadway width28 ft (8.5 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic100 (2025)
Projected traffic100 by 2040
Trucks3%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesOverpass structure at an interchange
CrossesHighway
Detour if closed—
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 S 67 over Int N Shelby I 15 built?

It was built in 1960, making it 65 years old in 2025.

What condition is S 67 over Int N Shelby I 15 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 2024.

How much traffic does S 67 over Int N Shelby I 15 carry?

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

How long is S 67 over Int N Shelby I 15?

The structure is 281 ft (85.6 m) long with a longest span of 80 ft (24.5 m) and a deck 32 ft wide.

Who owns S 67 over Int N Shelby I 15?

It is owned by the State Highway Agency.