US Bridges

Blackfoot Road over Blackfoot R. & Trail Cr.

Fair

Bingham County, Idaho · 9.7 S. 15.7 E. Kimball · Structure no. 000000000022920

Built
1985
40 years old
Condition
Fair
inspected October 2023
Type
Stringer/Multi-beam or Girder
Steel
Length
123 ft
2 main spans
Daily traffic
30
2023 count
Owner
County
County Highway Agency

About this bridge

Blackfoot Road over Blackfoot R. & Trail Cr. is a steel stringer/multi-beam or girder carrying Blackfoot Road over Blackfoot R. & Trail Cr. in Bingham County, Idaho. It was built in 1985, so it is 40 years old, younger 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 30 vehicles a day, roughly 50% of them trucks, projected to reach 45 by 2042. The structure is 123 ft (37.5 m) long and 26 ft wide. If it were closed, the detour would be 19.3 mi (31 km).

Location

Open in Google Maps
CarriesBlackfoot Road
CrossesBlackfoot R. & Trail Cr.
Location9.7 S. 15.7 E. Kimball
RouteCounty Highway 0
CountyBingham County
StateIdaho
Coordinates43.1291, -111.91104
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
Deck6 SatisfactoryStructural elements show some minor deterioration.
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 inspectionOctober 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourScour critical; foundations unstable for calculated scour conditions
Structural evaluation6: Equal to present minimum criteria
Deck geometry6: Equal to present minimum criteria
Waterway adequacy7: Better than present minimum criteria
Approach roadway alignment5: Somewhat better than minimum adequacy to tolerate being left in place as is
Operating rating101 US tons
Inventory rating60 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialSteel
DeckConcrete, cast-in-place
Main spans2
Design loadHS 20
Structure length123 ft (37.5 m)
Longest span60 ft (18.3 m)
Deck width26 ft (7.9 m)
Roadway width24 ft (7.3 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic30 (2023)
Projected traffic45 by 2042
Trucks50%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed19.3 mi (31 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 proposedNone recorded
Estimated improvement cost—
NavigationNo navigation control on waterway

Frequently asked questions

When was Blackfoot Road over Blackfoot R. & Trail Cr. built?

It was built in 1985, making it 40 years old in 2025.

What condition is Blackfoot Road over Blackfoot R. & Trail Cr. 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 Blackfoot Road over Blackfoot R. & Trail Cr. carry?

About 30 vehicles per day (2023 count), of which roughly 50% are trucks.

How long is Blackfoot Road over Blackfoot R. & Trail Cr.?

The structure is 123 ft (37.5 m) long with a longest span of 60 ft (18.3 m) and a deck 26 ft wide.

Who owns Blackfoot Road over Blackfoot R. & Trail Cr.?

It is owned by the County Highway Agency.