US Bridges

Stc 1847; E 1250 N over Snake River;w.Shelley Br

Fair

Bingham County, Idaho · 2.1 W. Shelley · Structure no. 000000000019275

Built
1965
60 years old
Condition
Fair
inspected October 2024
Type
Stringer/Multi-beam or Girder
Prestressed Concrete
Length
416 ft
4 main spans
Daily traffic
3,300
2023 count
Owner
County
County Highway Agency

About this bridge

Stc 1847; E 1250 N over Snake River;w.Shelley Br is a prestressed concrete stringer/multi-beam or girder carrying Stc 1847; E 1250 N over Snake River;w.Shelley Br in Bingham County, Idaho. It was built in 1965, so it is 60 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 3,300 vehicles a day, roughly 10% of them trucks, projected to reach 4,950 by 2042. The structure is 416 ft (126.8 m) long and 33 ft wide. If it were closed, the detour would be 14.9 mi (24 km).

Location

Open in Google Maps
CarriesStc 1847; E 1250 N
CrossesSnake River;w.Shelley Br
Location2.1 W. Shelley
RouteCounty Highway 1847
CountyBingham County
StateIdaho
Coordinates43.37672, -112.16953
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.
Superstructure6 SatisfactoryStructural elements show some minor deterioration.
Substructure6 SatisfactoryStructural elements show some minor deterioration.
Channel and channel protection7 GoodSome minor problems.
Last inspectionOctober 2024
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 alignment8: Equal to present desirable criteria
Operating rating48 US tons
Inventory rating23 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialPrestressed Concrete
DeckConcrete, cast-in-place
Main spans4
Design loadHS 20
Structure length416 ft (126.8 m)
Longest span102 ft (31.1 m)
Deck width33 ft (10.1 m)
Roadway width28 ft (8.5 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic3,300 (2023)
Projected traffic4,950 by 2042
Trucks10%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed14.9 mi (24 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$4.9 million (2020 estimate)
NavigationNo navigation control on waterway

Frequently asked questions

When was Stc 1847; E 1250 N over Snake River;w.Shelley Br built?

It was built in 1965, making it 60 years old in 2025.

What condition is Stc 1847; E 1250 N over Snake River;w.Shelley 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 2024.

How much traffic does Stc 1847; E 1250 N over Snake River;w.Shelley Br carry?

About 3,300 vehicles per day (2023 count), of which roughly 10% are trucks.

How long is Stc 1847; E 1250 N over Snake River;w.Shelley Br?

The structure is 416 ft (126.8 m) long with a longest span of 102 ft (31.1 m) and a deck 33 ft wide.

Who owns Stc 1847; E 1250 N over Snake River;w.Shelley Br?

It is owned by the County Highway Agency.