US Bridges

Ferry Butte RD over I 15;FERRY Butte Road Gs

Fair

Bingham County, Idaho · 5.5 S. Blackfoot · Structure no. 000000000023100

Built
1959
66 years old
Condition
Fair
inspected June 2023
Type
Stringer/Multi-beam or Girder
Prestressed Concrete
Length
282 ft
5 main spans
Daily traffic
2,250
2023 count
Owner
State
State Highway Agency

About this bridge

Ferry Butte RD over I 15;FERRY Butte Road Gs is a prestressed concrete stringer/multi-beam or girder carrying Ferry Butte RD over I 15;FERRY Butte Road Gs in Bingham 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 2,250 vehicles a day, roughly 10% of them trucks, projected to reach 375 by 2042. The structure is 282 ft (86 m) long and 29 ft wide. If it were closed, the detour would be 11.2 mi (18 km).

Location

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CarriesFerry Butte RD
CrossesI 15;FERRY Butte Road Gs
Location5.5 S. Blackfoot
RouteCounty Highway 0
CountyBingham County
StateIdaho
Coordinates43.12367, -112.38925
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.
Substructure6 SatisfactoryStructural elements show some minor deterioration.
Last inspectionJune 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourBridge not over waterway
Structural evaluation6: Equal to present minimum criteria
Deck geometry2: Basically intolerable, requiring high priority of replacement
Approach roadway alignment8: Equal to present desirable criteria
Operating rating56 US tons
Inventory rating34 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialPrestressed Concrete
DeckConcrete, cast-in-place
Main spans5 (+1 approach)
Design loadHS 20
Structure length282 ft (86 m)
Longest span49 ft (14.9 m)
Deck width29 ft (8.7 m)
Roadway width24 ft (7.3 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic2,250 (2023)
Projected traffic375 by 2042
Trucks10%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesHighway
Detour if closed11.2 mi (18 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$2.3 million (2018 estimate)
NavigationNot applicable (no waterway)

Frequently asked questions

When was Ferry Butte RD over I 15;FERRY Butte Road Gs built?

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

What condition is Ferry Butte RD over I 15;FERRY Butte Road 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 June 2023.

How much traffic does Ferry Butte RD over I 15;FERRY Butte Road Gs carry?

About 2,250 vehicles per day (2023 count), of which roughly 10% are trucks.

How long is Ferry Butte RD over I 15;FERRY Butte Road Gs?

The structure is 282 ft (86 m) long with a longest span of 49 ft (14.9 m) and a deck 29 ft wide.

Who owns Ferry Butte RD over I 15;FERRY Butte Road Gs?

It is owned by the State Highway Agency.