US Bridges

I 15 over Bell Creek

Fair

Silver Bow County, Montana · W Oregon Ave Overpass · Structure no. 000000202408081

Built
1963
62 years old
Condition
Fair
inspected November 2024
Type
Culvert
Steel
Length
32 ft
2 main spans
Daily traffic
19,755
2023 count
Owner
State
State Highway Agency

About this bridge

I 15 over Bell Creek is a steel culvert carrying I 15 over Bell Creek in Silver Bow County, Montana. It was built in 1963, so it is 62 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 19,755 vehicles a day, roughly 11% of them trucks, projected to reach 21,138 by 2043. The structure is 32 ft (9.7 m) long.

CarriesI 15
CrossesBell Creek
LocationW Oregon Ave Overpass
RouteInterstate 15
StateMontana
Coordinates45.98928, -112.52347
Functional classUrban 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
Channel and channel protection7 GoodSome minor problems.
Culvert6 SatisfactoryStructural elements show some minor deterioration.
Last inspectionNovember 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation*: *
Waterway adequacy8: Equal to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating—
Inventory rating—

Structure

Structure typeCulvert
MaterialSteel
DeckNot applicable
Main spans2
Design loadUnknown
Structure length32 ft (9.7 m)
Longest span14 ft (4.2 m)
Deck width0 ft (0 m)
Roadway width0 ft (0 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic19,755 (2023)
Projected traffic21,138 by 2043
Trucks11%
Lanes on structure4
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
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—
NavigationNo navigation control on waterway

Frequently asked questions

When was I 15 over Bell Creek built?

It was built in 1963, making it 62 years old in 2025.

What condition is I 15 over Bell Creek 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 2024.

How much traffic does I 15 over Bell Creek carry?

About 19,755 vehicles per day (2023 count), of which roughly 11% are trucks.

How long is I 15 over Bell Creek?

The structure is 32 ft (9.7 m) long with a longest span of 14 ft (4.2 m).

Who owns I 15 over Bell Creek?

It is owned by the State Highway Agency.