US Bridges

I 84 ;us 20-26 over Stp 7773;10th Ave Ic

Fair

Canyon County, Idaho · In CALDWELL;10th Ave · Structure no. 000000000015505

Built
1983
42 years old
Condition
Fair
inspected October 2023
Type
Box Beam or Girders - Single or Spread
Concrete Continuous
Length
249 ft
3 main spans
Daily traffic
58,000
2023 count
Owner
State
State Highway Agency

About this bridge

I 84 ;us 20-26 over Stp 7773;10th Ave Ic is a concrete continuous box beam or girders - single or spread carrying I 84 ;us 20-26 over Stp 7773;10th Ave Ic in Canyon County, Idaho. It was built in 1983, so it is 42 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 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 58,000 vehicles a day, roughly 25% of them trucks, projected to reach 87,000 by 2042. The structure is 249 ft (75.9 m) long and 114 ft wide.

Location

Open in Google Maps
CarriesI 84 ;us 20-26
CrossesStp 7773;10th Ave Ic
LocationIn CALDWELL;10th Ave
RouteInterstate 84
CountyCanyon County
StateIdaho
Coordinates43.67106, -116.67847
Functional classUrban Principal Arterial - Interstate

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.
Last inspectionOctober 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourBridge not over waterway
Structural evaluation6: Equal to present minimum criteria
Deck geometry9: Superior to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating53.6 US tons
Inventory rating41.4 US tons

Structure

Structure typeBox Beam or Girders - Single or Spread
MaterialConcrete Continuous
DeckConcrete, cast-in-place
Main spans3
Design loadHS 25 or greater
Structure length249 ft (75.9 m)
Longest span128 ft (39 m)
Deck width114 ft (34.8 m)
Roadway width111 ft (33.9 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic58,000 (2023)
Projected traffic87,000 by 2042
Trucks25%
Lanes on structure5
Traffic directionTwo-way traffic
CarriesOverpass structure at an interchange
CrossesHighway
Detour if closed—
TollOn a free road
National Highway SystemYes
Strategic Highway NetworkInterstate STRAHNET route

Ownership and planned work

OwnerState Highway Agency
Maintained byState Highway Agency
Historic statusHistorical significance not determinable at this time
Work proposedNone recorded
Estimated improvement cost—
NavigationNot applicable (no waterway)

Frequently asked questions

When was I 84 ;us 20-26 over Stp 7773;10th Ave Ic built?

It was built in 1983, making it 42 years old in 2025.

What condition is I 84 ;us 20-26 over Stp 7773;10th Ave Ic 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 October 2023.

How much traffic does I 84 ;us 20-26 over Stp 7773;10th Ave Ic carry?

About 58,000 vehicles per day (2023 count), of which roughly 25% are trucks.

How long is I 84 ;us 20-26 over Stp 7773;10th Ave Ic?

The structure is 249 ft (75.9 m) long with a longest span of 128 ft (39 m) and a deck 114 ft wide.

Who owns I 84 ;us 20-26 over Stp 7773;10th Ave Ic?

It is owned by the State Highway Agency.