US Bridges

E. Center Road over Blackfoot Canal

Fair

Bingham County, Idaho · In Firth · Structure no. 000000000022845

Built
1972
53 years old
Condition
Fair
inspected November 2023
Type
Tee Beam
Prestressed Concrete
Length
42 ft
1 main span
Daily traffic
1,300
2023 count
Owner
City
City or Municipal Highway Agency

About this bridge

E. Center Road over Blackfoot Canal is a prestressed concrete tee beam carrying E. Center Road over Blackfoot Canal in Bingham County, Idaho. It was built in 1972, so it is 53 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 1,300 vehicles a day, roughly 9% of them trucks, projected to reach 1,950 by 2042. The structure is 42 ft (12.8 m) long and 35 ft wide. If it were closed, the detour would be 1.2 mi (2 km).

Location

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CarriesE. Center Road
CrossesBlackfoot Canal
LocationIn Firth
RouteCity Street 0
CountyBingham County
StateIdaho
Coordinates43.3043, -112.18038
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.
Channel and channel protection6 SatisfactoryStructural elements show some minor deterioration.
Last inspectionNovember 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 geometry5: Somewhat better than minimum adequacy to tolerate being left in place as is
Waterway adequacy7: Better than present minimum criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating38 US tons
Inventory rating23 US tons

Structure

Structure typeTee Beam
MaterialPrestressed Concrete
DeckConcrete, cast-in-place
Main spans1
Design loadH 20
Structure length42 ft (12.8 m)
Longest span41 ft (12.5 m)
Deck width35 ft (10.7 m)
Roadway width28 ft (8.5 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic1,300 (2023)
Projected traffic1,950 by 2042
Trucks9%
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 proposedReplacement because of substandard load-carrying capacity or roadway geometry
Estimated improvement cost$603,000 (2019 estimate)
NavigationNo navigation control on waterway

Frequently asked questions

When was E. Center Road over Blackfoot Canal built?

It was built in 1972, making it 53 years old in 2025.

What condition is E. Center Road over Blackfoot Canal 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 November 2023.

How much traffic does E. Center Road over Blackfoot Canal carry?

About 1,300 vehicles per day (2023 count), of which roughly 9% are trucks.

How long is E. Center Road over Blackfoot Canal?

The structure is 42 ft (12.8 m) long with a longest span of 41 ft (12.5 m) and a deck 35 ft wide.

Who owns E. Center Road over Blackfoot Canal?

It is owned by the City or Municipal Highway Agency.