US Bridges

STC7808;MIDDLETON over Willow Creek

Fair

Canyon County, Idaho · 1.3 N. 0.3 E. Middleton · Structure no. 000000000027395

Built
1978
47 years old
Condition
Fair
inspected November 2023
Type
Tee Beam
Prestressed Concrete
Length
23 ft
1 main span
Daily traffic
950
2023 count
Owner
Local
Other Local Agency

About this bridge

STC7808;MIDDLETON over Willow Creek is a prestressed concrete tee beam carrying STC7808;MIDDLETON over Willow Creek in Canyon County, Idaho. It was built in 1978, so it is 47 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 950 vehicles a day, roughly 6% of them trucks, projected to reach 1,425 by 2042. The structure is 23 ft (7 m) long and 28 ft wide. If it were closed, the detour would be 1.9 mi (3 km).

Location

Open in Google Maps
CarriesSTC7808;MIDDLETON
CrossesWillow Creek
Location1.3 N. 0.3 E. Middleton
RouteCounty Highway 7808
CountyCanyon County
StateIdaho
Coordinates43.72555, -116.61264
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
Deck6 SatisfactoryStructural elements show some minor deterioration.
Superstructure6 SatisfactoryStructural elements show some minor deterioration.
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 within limits of footing or piles
Structural evaluation4: Meets minimum tolerable limits to be left in place as is
Deck geometry5: Somewhat better than minimum adequacy to tolerate being left in place as is
Waterway adequacy9: Superior to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating30 US tons
Inventory rating18 US tons

Structure

Structure typeTee Beam
MaterialPrestressed Concrete
DeckConcrete, cast-in-place
Main spans1
Design loadHS 15
Structure length23 ft (7 m)
Longest span22 ft (6.7 m)
Deck width28 ft (8.6 m)
Roadway width28 ft (8.5 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic950 (2023)
Projected traffic1,425 by 2042
Trucks6%
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

OwnerOther Local Agency
Maintained byOther Local Agency
Historic statusHistorical significance not determinable at this time
Work proposedReplacement because of substandard load-carrying capacity or roadway geometry
Estimated improvement cost$362,000 (2019 estimate)
NavigationNo navigation control on waterway

Frequently asked questions

When was STC7808;MIDDLETON over Willow Creek built?

It was built in 1978, making it 47 years old in 2025.

What condition is STC7808;MIDDLETON over 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 STC7808;MIDDLETON over Willow Creek carry?

About 950 vehicles per day (2023 count), of which roughly 6% are trucks.

How long is STC7808;MIDDLETON over Willow Creek?

The structure is 23 ft (7 m) long with a longest span of 22 ft (6.7 m) and a deck 28 ft wide.

Who owns STC7808;MIDDLETON over Willow Creek?

It is owned by the Other Local Agency.