US Bridges

Philbin Road over I 86 Eb-Wb;philbin RD Gs

Fair

Bannock County, Idaho · 1.5 W. Chubbuck · Structure no. 000000000022105

Built
1968
57 years old
Condition
Fair
inspected August 2024
Type
Stringer/Multi-beam or Girder
Prestressed Concrete
Length
242 ft
5 main spans
Daily traffic
7,000
2023 count
Owner
State
State Highway Agency

About this bridge

Philbin Road over I 86 Eb-Wb;philbin RD Gs is a prestressed concrete stringer/multi-beam or girder carrying Philbin Road over I 86 Eb-Wb;philbin RD Gs in Bannock County, Idaho. It was built in 1968, so it is 57 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 7,000 vehicles a day, roughly 3% of them trucks, projected to reach 10,500 by 2042. The structure is 242 ft (73.8 m) long and 33 ft wide. If it were closed, the detour would be 3.7 mi (6 km).

CarriesPhilbin Road
CrossesI 86 Eb-Wb;philbin RD Gs
Location1.5 W. Chubbuck
RouteCounty Highway 0
StateIdaho
Coordinates42.91253, -112.49583
Functional classUrban Minor Arterial

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.
Superstructure6 SatisfactoryStructural elements show some minor deterioration.
Substructure6 SatisfactoryStructural elements show some minor deterioration.
Last inspectionAugust 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourBridge not over waterway
Structural evaluation6: Equal to present minimum criteria
Deck geometry4: Meets minimum tolerable limits to be left in place as is
Approach roadway alignment8: Equal to present desirable criteria
Operating rating67 US tons
Inventory rating40 US tons

Structure

MaterialPrestressed Concrete
DeckConcrete, cast-in-place
Main spans5
Design loadHS 20
Structure length242 ft (73.8 m)
Longest span50 ft (15.2 m)
Deck width33 ft (10.2 m)
Roadway width28 ft (8.5 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic7,000 (2023)
Projected traffic10,500 by 2042
Trucks3%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesHighway
Detour if closed3.7 mi (6 km)
TollOn a free road
National Highway SystemNo

Ownership and planned work

OwnerState Highway Agency
Maintained byState Highway Agency
Historic statusHistorical significance not determinable at this time
Work proposedReplacement because of substandard load-carrying capacity or roadway geometry
Estimated improvement cost$3.8 million (2018 estimate)
NavigationNot applicable (no waterway)

Frequently asked questions

When was Philbin Road over I 86 Eb-Wb;philbin RD Gs built?

It was built in 1968, making it 57 years old in 2025.

What condition is Philbin Road over I 86 Eb-Wb;philbin RD Gs 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 August 2024.

How much traffic does Philbin Road over I 86 Eb-Wb;philbin RD Gs carry?

About 7,000 vehicles per day (2023 count), of which roughly 3% are trucks.

How long is Philbin Road over I 86 Eb-Wb;philbin RD Gs?

The structure is 242 ft (73.8 m) long with a longest span of 50 ft (15.2 m) and a deck 33 ft wide.

Who owns Philbin Road over I 86 Eb-Wb;philbin RD Gs?

It is owned by the State Highway Agency.