US Bridges

Stc 6706;HITT Road over North Fork Willow Creek

Fair

Bonneville County, Idaho · 2.6 S. 1.0 W. Ucon · Structure no. 000000000031260

Built
1963
62 years old
Condition
Fair
inspected November 2023
Type
Frame
Concrete
Length
25 ft
1 main span
Daily traffic
8,400
2023 count
Owner
County
County Highway Agency

About this bridge

Stc 6706;HITT Road over North Fork Willow Creek is a concrete frame carrying Stc 6706;HITT Road over North Fork Willow Creek in Bonneville County, Idaho. It was built in 1963, so it is 62 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 5 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 8,400 vehicles a day, roughly 3% of them trucks, projected to reach 12,600 by 2042. The structure is 25 ft (7.6 m) long and 30 ft wide. If it were closed, the detour would be 1.9 mi (3 km).

Location

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CarriesStc 6706;HITT Road
CrossesNorth Fork Willow Creek
Location2.6 S. 1.0 W. Ucon
RouteCounty Highway 6706
CountyBonneville County
StateIdaho
Coordinates43.55364, -111.98392
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
Deck5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Superstructure5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Substructure6 SatisfactoryStructural elements show some minor deterioration.
Channel and channel protection7 GoodSome minor problems.
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 geometry2: Basically intolerable, requiring high priority of replacement
Waterway adequacy8: Equal to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating56 US tons
Inventory rating33 US tons

Structure

Structure typeFrame
MaterialConcrete
DeckConcrete, cast-in-place
Main spans1
Design loadH 15
Structure length25 ft (7.6 m)
Longest span25 ft (7.6 m)
Deck width30 ft (9.2 m)
Roadway width28 ft (8.6 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic8,400 (2023)
Projected traffic12,600 by 2042
Trucks3%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed1.9 mi (3 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$544,000 (2017 estimate)
NavigationNo navigation control on waterway

Frequently asked questions

When was Stc 6706;HITT Road over North Fork Willow Creek built?

It was built in 1963, making it 62 years old in 2025.

What condition is Stc 6706;HITT Road over North Fork Willow Creek 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 Stc 6706;HITT Road over North Fork Willow Creek carry?

About 8,400 vehicles per day (2023 count), of which roughly 3% are trucks.

How long is Stc 6706;HITT Road over North Fork Willow Creek?

The structure is 25 ft (7.6 m) long with a longest span of 25 ft (7.6 m) and a deck 30 ft wide.

Who owns Stc 6706;HITT Road over North Fork Willow Creek?

It is owned by the County Highway Agency.