US Bridges

STC1888;FERRY Bte over Snake R.;ferry Butte Br.

Fair

Bingham County, Idaho · 4.5 S. 1.0 E. Rockford · Structure no. 000000000019340

Built
1964
61 years old
Condition
Fair
inspected October 2023
Type
Stringer/Multi-beam or Girder
Prestressed Concrete
Length
483 ft
4 main spans
Daily traffic
1,800
2023 count
Owner
County
County Highway Agency

About this bridge

STC1888;FERRY Bte over Snake R.;ferry Butte Br. is a prestressed concrete stringer/multi-beam or girder carrying STC1888;FERRY Bte over Snake R.;ferry Butte Br. in Bingham County, Idaho. It was built in 1964, so it is 61 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 5 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 1,800 vehicles a day, projected to reach 2,700 by 2042. The structure is 483 ft (147.2 m) long and 31 ft wide. If it were closed, the detour would be 21.1 mi (34 km).

Location

Open in Google Maps
CarriesSTC1888;FERRY Bte
CrossesSnake R.;ferry Butte Br.
Location4.5 S. 1.0 E. Rockford
RouteCounty Highway 1888
CountyBingham County
StateIdaho
Coordinates43.12736, -112.51414
Functional classRural Major Collector

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.
Superstructure5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Substructure6 SatisfactoryStructural elements show some minor deterioration.
Channel and channel protection6 SatisfactoryStructural elements show some minor deterioration.
Last inspectionOctober 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation5: Somewhat better than minimum adequacy to tolerate being left in place as is
Deck geometry4: Meets minimum tolerable limits to be left in place as is
Waterway adequacy8: Equal to present desirable criteria
Approach roadway alignment6: Equal to present minimum criteria
Operating rating61.9 US tons
Inventory rating28 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialPrestressed Concrete
DeckConcrete, cast-in-place
Main spans4
Design loadH 15
Structure length483 ft (147.2 m)
Longest span119 ft (36.3 m)
Deck width31 ft (9.4 m)
Roadway width26 ft (7.9 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic1,800 (2023)
Projected traffic2,700 by 2042
Trucks0%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed21.1 mi (34 km)
TollOn a free road
National Highway SystemNo

Ownership and planned work

OwnerCounty Highway Agency
Maintained byCounty Highway Agency
Historic statusHistorical significance not determinable at this time
Work proposedReplacement because of substandard load-carrying capacity or roadway geometry
Estimated improvement cost$5.3 million (2019 estimate)
NavigationNo navigation control on waterway

Frequently asked questions

When was STC1888;FERRY Bte over Snake R.;ferry Butte Br. built?

It was built in 1964, making it 61 years old in 2025.

What condition is STC1888;FERRY Bte over Snake R.;ferry Butte Br. 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 October 2023.

How much traffic does STC1888;FERRY Bte over Snake R.;ferry Butte Br. carry?

About 1,800 vehicles per day (2023 count).

How long is STC1888;FERRY Bte over Snake R.;ferry Butte Br.?

The structure is 483 ft (147.2 m) long with a longest span of 119 ft (36.3 m) and a deck 31 ft wide.

Who owns STC1888;FERRY Bte over Snake R.;ferry Butte Br.?

It is owned by the County Highway Agency.