US Bridges

I 15 Sbl over Private Rd.;machine Pass

Fair

Bannock County, Idaho · 6.9 N. Pocatello · Structure no. 000000000011310

Built
1959
66 years old
Condition
Fair
inspected May 2022
Type
Frame
Concrete
Length
24 ft
1 main span
Daily traffic
14,250
2023 count
Owner
State
State Highway Agency

About this bridge

I 15 Sbl over Private Rd.;machine Pass is a concrete frame carrying I 15 Sbl over Private Rd.;machine Pass in Bannock County, Idaho. It was built in 1959, so it is 66 years old, older than the Idaho average of 45.3 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 14,250 vehicles a day, roughly 18% of them trucks, projected to reach 21,375 by 2042. The structure is 24 ft (7.3 m) long and 48 ft wide. If it were closed, the detour would be 1.2 mi (2 km).

CarriesI 15 Sbl
CrossesPrivate Rd.;machine Pass
Location6.9 N. Pocatello
RouteInterstate 15
StateIdaho
Coordinates42.97125, -112.42537
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
Deck7 GoodSome minor problems.
Superstructure7 GoodSome minor problems.
Substructure6 SatisfactoryStructural elements show some minor deterioration.
Last inspectionMay 2022
Inspection intervalevery 48 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 rating69 US tons
Inventory rating41 US tons

Structure

Structure typeFrame
MaterialConcrete
DeckConcrete, cast-in-place
Main spans1
Design loadHS 20
Structure length24 ft (7.3 m)
Longest span24 ft (7.3 m)
Deck width48 ft (14.6 m)
Roadway width41 ft (12.6 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic14,250 (2023)
Projected traffic21,375 by 2042
Trucks18%
Lanes on structure2
Traffic directionOne-way traffic
CarriesHighway
CrossesOther
Detour if closed1.2 mi (2 km)
TollOn a free road
National Highway SystemYes
Strategic Highway NetworkInterstate STRAHNET route

Ownership and planned work

OwnerState Highway Agency
Maintained byState Highway Agency
Historic statusHistorical significance not determinable at this time
Work proposedNone recorded
Estimated improvement cost—
NavigationNot applicable (no waterway)

Frequently asked questions

When was I 15 Sbl over Private Rd.;machine Pass built?

It was built in 1959, making it 66 years old in 2025.

What condition is I 15 Sbl over Private Rd.;machine Pass 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 2022.

How much traffic does I 15 Sbl over Private Rd.;machine Pass carry?

About 14,250 vehicles per day (2023 count), of which roughly 18% are trucks.

How long is I 15 Sbl over Private Rd.;machine Pass?

The structure is 24 ft (7.3 m) long with a longest span of 24 ft (7.3 m) and a deck 48 ft wide.

Who owns I 15 Sbl over Private Rd.;machine Pass?

It is owned by the State Highway Agency.