US Bridges

Stc 7486;12th ST over Idaho Canal

Good

Bonneville County, Idaho · In Idaho FALLS;12th ST · Structure no. 000000000031341

Built
2020
5 years old
Condition
Good
inspected March 2022
Type
Box Beam or Girders - Multiple
Prestressed Concrete
Length
58 ft
1 main span
Daily traffic
4,200
2023 count
Owner
City
City or Municipal Highway Agency

About this bridge

Stc 7486;12th ST over Idaho Canal is a prestressed concrete box beam or girders - multiple carrying Stc 7486;12th ST over Idaho Canal in Bonneville County, Idaho. It was built in 2020, so it is 5 years old, younger than the Idaho average of 45.3 years.

The most recent inspection reported to the Federal Highway Administration rates it in good condition with a lowest component rating of 8 out of 9. All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted.

It carries about 4,200 vehicles a day, roughly 2% of them trucks, projected to reach 6,300 by 2042. The structure is 58 ft (17.7 m) long and 56 ft wide. If it were closed, the detour would be 1.2 mi (2 km).

Location

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CarriesStc 7486;12th ST
CrossesIdaho Canal
LocationIn Idaho FALLS;12th ST
RouteCity Street 7486
CountyBonneville County
StateIdaho
Coordinates43.48703, -112.01247
Functional classUrban Collector

Condition and inspection

Good

All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted.

ComponentRatingMeaning
Deck8 Very GoodNo problems noted.
Superstructure8 Very GoodNo problems noted.
Substructure8 Very GoodNo problems noted.
Channel and channel protection9 ExcellentNo problems noted.
Last inspectionMarch 2022
Inspection intervalevery 48 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation8: Equal to present desirable criteria
Deck geometry6: Equal to present minimum criteria
Waterway adequacy8: Equal to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating67.5 US tons
Inventory rating52.1 US tons

Structure

Structure typeBox Beam or Girders - Multiple
MaterialPrestressed Concrete
DeckConcrete, precast panels
Main spans1
Design loadHL 93
Structure length58 ft (17.7 m)
Longest span55 ft (16.8 m)
Deck width56 ft (17.1 m)
Roadway width40 ft (12.2 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic4,200 (2023)
Projected traffic6,300 by 2042
Trucks2%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway and pedestrian
CrossesWaterway
Detour if closed1.2 mi (2 km)
TollOn a free road
National Highway SystemNo

Ownership and planned work

OwnerCity or Municipal Highway Agency
Maintained byCity or Municipal Highway Agency
Historic statusHistorical significance not determinable at this time
Work proposedNone recorded
Estimated improvement cost—
NavigationNo navigation control on waterway

Frequently asked questions

When was Stc 7486;12th ST over Idaho Canal built?

It was built in 2020, making it 5 years old in 2025.

What condition is Stc 7486;12th ST over Idaho Canal in?

The National Bridge Inventory rates it in good condition. All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted. The last reported inspection was in March 2022.

How much traffic does Stc 7486;12th ST over Idaho Canal carry?

About 4,200 vehicles per day (2023 count), of which roughly 2% are trucks.

How long is Stc 7486;12th ST over Idaho Canal?

The structure is 58 ft (17.7 m) long with a longest span of 55 ft (16.8 m) and a deck 56 ft wide.

Who owns Stc 7486;12th ST over Idaho Canal?

It is owned by the City or Municipal Highway Agency.