US Bridges

Trail Creek Road over Blackfoot River

Good

Caribou County, Idaho · 15.6 N.E. Soda Springs · Structure no. 000000000023301

Built
2001
24 years old
Condition
Good
inspected April 2022
Type
Stringer/Multi-beam or Girder
Prestressed Concrete
Length
71 ft
1 main span
Daily traffic
100
2023 count
Owner
County
County Highway Agency

About this bridge

Trail Creek Road over Blackfoot River is a prestressed concrete stringer/multi-beam or girder carrying Trail Creek Road over Blackfoot River in Caribou County, Idaho. It was built in 2001, so it is 24 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 7 out of 9. All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted.

It carries about 100 vehicles a day, roughly 25% of them trucks, projected to reach 150 by 2042. The structure is 71 ft (21.6 m) long and 25 ft wide. If it were closed, the detour would be 19.9 mi (32 km).

Location

Open in Google Maps
CarriesTrail Creek Road
CrossesBlackfoot River
Location15.6 N.E. Soda Springs
RouteCounty Highway 0
CountyCaribou County
StateIdaho
Coordinates42.76728, -111.44693
Functional classRural Minor Collector

Condition and inspection

Good

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

ComponentRatingMeaning
Deck7 GoodSome minor problems.
Superstructure7 GoodSome minor problems.
Substructure7 GoodSome minor problems.
Channel and channel protection8 Very GoodNo problems noted.
Last inspectionApril 2022
Inspection intervalevery 48 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation7: Better than present minimum criteria
Deck geometry5: Somewhat better than minimum adequacy to tolerate being left in place as is
Waterway adequacy8: Equal to present desirable criteria
Approach roadway alignment6: Equal to present minimum criteria
Operating rating91.1 US tons
Inventory rating46 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialPrestressed Concrete
DeckConcrete, cast-in-place
Main spans1
Design loadHS 20
Structure length71 ft (21.6 m)
Longest span68 ft (20.7 m)
Deck width25 ft (7.7 m)
Roadway width22 ft (6.7 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic100 (2023)
Projected traffic150 by 2042
Trucks25%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed19.9 mi (32 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 Trail Creek Road over Blackfoot River built?

It was built in 2001, making it 24 years old in 2025.

What condition is Trail Creek Road over Blackfoot River 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 April 2022.

How much traffic does Trail Creek Road over Blackfoot River carry?

About 100 vehicles per day (2023 count), of which roughly 25% are trucks.

How long is Trail Creek Road over Blackfoot River?

The structure is 71 ft (21.6 m) long with a longest span of 68 ft (20.7 m) and a deck 25 ft wide.

Who owns Trail Creek Road over Blackfoot River?

It is owned by the County Highway Agency.