US Bridges

S. 12th Avenue over Indian Creek

Fair

Canyon County, Idaho · In CALDWELL;S.12th Ave · Structure no. 000000000027665

Built
1935
90 years old, rebuilt 1980
Condition
Fair
inspected March 2023
Type
Slab
Concrete
Length
40 ft
2 main spans
Daily traffic
560
2023 count
Owner
City
City or Municipal Highway Agency

About this bridge

S. 12th Avenue over Indian Creek is a concrete slab carrying S. 12th Avenue over Indian Creek in Canyon County, Idaho. It was built in 1935 and reconstructed in 1980, so it is 90 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 560 vehicles a day, roughly 10% of them trucks, projected to reach 840 by 2039. The structure is 40 ft (12.2 m) long and 80 ft wide. If it were closed, the detour would be 0.6 mi (1 km).

Location

Open in Google Maps
CarriesS. 12th Avenue
CrossesIndian Creek
LocationIn CALDWELL;S.12th Ave
RouteCity Street 0
CountyCanyon County
StateIdaho
Coordinates43.66314, -116.68342
Functional classUrban 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
Deck5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Superstructure6 SatisfactoryStructural elements show some minor deterioration.
Substructure5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Channel and channel protection6 SatisfactoryStructural elements show some minor deterioration.
Last inspectionMarch 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourUnknown foundation; not evaluated for scour
Structural evaluation5: Somewhat better than minimum adequacy to tolerate being left in place as is
Deck geometry9: Superior to present desirable criteria
Waterway adequacy7: Better than present minimum criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating41 US tons
Inventory rating24 US tons

Structure

Structure typeSlab
MaterialConcrete
DeckConcrete, cast-in-place
Main spans2
Design loadH 20
Structure length40 ft (12.2 m)
Longest span19 ft (5.8 m)
Deck width80 ft (24.4 m)
Roadway width50 ft (15.2 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic560 (2023)
Projected traffic840 by 2039
Trucks10%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway and pedestrian
CrossesWaterway
Detour if closed0.6 mi (1 km)
TollOn a free road
National Highway SystemNo

Ownership and planned work

OwnerCity or Municipal Highway Agency
Maintained byCity or Municipal 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 S. 12th Avenue over Indian Creek built?

It was built in 1935, making it 90 years old in 2025. It was reconstructed in 1980.

What condition is S. 12th Avenue over 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 2023.

How much traffic does S. 12th Avenue over Indian Creek carry?

About 560 vehicles per day (2023 count), of which roughly 10% are trucks.

How long is S. 12th Avenue over Indian Creek?

The structure is 40 ft (12.2 m) long with a longest span of 19 ft (5.8 m) and a deck 80 ft wide.

Who owns S. 12th Avenue over Indian Creek?

It is owned by the City or Municipal Highway Agency.