US Bridges

S. 9th Avenue over Indian Creek

Fair

Canyon County, Idaho · In CALDWELL;S.9th Ave · Structure no. 000000000027615

Built
1968
57 years old
Condition
Fair
inspected March 2023
Type
Tee Beam
Prestressed Concrete
Length
39 ft
1 main span
Daily traffic
750
2023 count
Owner
City
City or Municipal Highway Agency

About this bridge

S. 9th Avenue over Indian Creek is a prestressed concrete tee beam carrying S. 9th Avenue over Indian Creek in Canyon County, Idaho. It was built in 1968, so it is 57 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 750 vehicles a day, roughly 10% of them trucks, projected to reach 1,125 by 2039. The structure is 39 ft (11.9 m) long and 81 ft wide. If it were closed, the detour would be 0.6 mi (1 km).

Location

Open in Google Maps
CarriesS. 9th Avenue
CrossesIndian Creek
LocationIn CALDWELL;S.9th Ave
RouteCity Street 0
CountyCanyon County
StateIdaho
Coordinates43.6645, -116.68753
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.
Substructure6 SatisfactoryStructural elements show some minor deterioration.
Channel and channel protection7 GoodSome minor problems.
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 rating38 US tons
Inventory rating23 US tons

Structure

Structure typeTee Beam
MaterialPrestressed Concrete
DeckConcrete, cast-in-place
Main spans1
Design loadH 20
Structure length39 ft (11.9 m)
Longest span38 ft (11.6 m)
Deck width81 ft (24.6 m)
Roadway width56 ft (17.2 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic750 (2023)
Projected traffic1,125 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. 9th Avenue over Indian Creek built?

It was built in 1968, making it 57 years old in 2025.

What condition is S. 9th 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. 9th Avenue over Indian Creek carry?

About 750 vehicles per day (2023 count), of which roughly 10% are trucks.

How long is S. 9th Avenue over Indian Creek?

The structure is 39 ft (11.9 m) long with a longest span of 38 ft (11.6 m) and a deck 81 ft wide.

Who owns S. 9th Avenue over Indian Creek?

It is owned by the City or Municipal Highway Agency.