US Bridges

Stc 3771;STROEBEL over North Indian Creek

Fair

Ada County, Idaho · 0.4 S. 1.8 E. Kuna · Structure no. 000000000026055

Built
1982
43 years old
Condition
Fair
inspected March 2024
Type
Tee Beam
Prestressed Concrete
Length
73 ft
2 main spans
Daily traffic
400
2023 count
Owner
County
County Highway Agency

About this bridge

Stc 3771;STROEBEL over North Indian Creek is a prestressed concrete tee beam carrying Stc 3771;STROEBEL over North Indian Creek in Ada County, Idaho. It was built in 1982, so it is 43 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 400 vehicles a day, roughly 10% of them trucks, projected to reach 600 by 2039. The structure is 73 ft (22.3 m) long and 32 ft wide. If it were closed, the detour would be 3.1 mi (5 km).

CarriesStc 3771;STROEBEL
CrossesNorth Indian Creek
Location0.4 S. 1.8 E. Kuna
RouteCounty Highway 3771
StateIdaho
Coordinates43.48478, -116.38433
Functional classRural Minor Arterial

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.
Superstructure7 GoodSome minor problems.
Substructure6 SatisfactoryStructural elements show some minor deterioration.
Channel and channel protection6 SatisfactoryStructural elements show some minor deterioration.
Last inspectionMarch 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour within limits of footing or piles
Structural evaluation6: Equal to present minimum criteria
Deck geometry6: Equal to present minimum criteria
Waterway adequacy9: Superior to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating52 US tons
Inventory rating31 US tons

Structure

Structure typeTee Beam
MaterialPrestressed Concrete
DeckConcrete, cast-in-place
Main spans2
Design loadHS 20
Structure length73 ft (22.3 m)
Longest span36 ft (11 m)
Deck width32 ft (9.8 m)
Roadway width30 ft (9.2 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic400 (2023)
Projected traffic600 by 2039
Trucks10%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed3.1 mi (5 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 Stc 3771;STROEBEL over North Indian Creek built?

It was built in 1982, making it 43 years old in 2025.

What condition is Stc 3771;STROEBEL over North Indian 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 March 2024.

How much traffic does Stc 3771;STROEBEL over North Indian Creek carry?

About 400 vehicles per day (2023 count), of which roughly 10% are trucks.

How long is Stc 3771;STROEBEL over North Indian Creek?

The structure is 73 ft (22.3 m) long with a longest span of 36 ft (11 m) and a deck 32 ft wide.

Who owns Stc 3771;STROEBEL over North Indian Creek?

It is owned by the County Highway Agency.