US Bridges

I 84 Wbl over Indian Creek

Fair

Ada County, Idaho · 15.9 E. Boise Ecl · Structure no. 000000000015810

Built
1960
65 years old, rebuilt 1980
Condition
Fair
inspected April 2024
Type
Tee Beam
Concrete
Length
26 ft
1 main span
Daily traffic
15,250
2023 count
Owner
State
State Highway Agency

About this bridge

I 84 Wbl over Indian Creek is a concrete tee beam carrying I 84 Wbl over Indian Creek in Ada County, Idaho. It was built in 1960 and reconstructed in 1980, so it is 65 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 15,250 vehicles a day, roughly 20% of them trucks, projected to reach 22,875 by 2042. The structure is 26 ft (7.9 m) long and 44 ft wide. If it were closed, the detour would be 1.2 mi (2 km).

Location

Open in Google Maps
CarriesI 84 Wbl
CrossesIndian Creek
Location15.9 E. Boise Ecl
RouteInterstate 84
CountyAda County
StateIdaho
Coordinates43.39118, -116.00316
Functional classRural 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.
Superstructure5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Substructure6 SatisfactoryStructural elements show some minor deterioration.
Channel and channel protection7 GoodSome minor problems.
Last inspectionApril 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; action required to protect exposed foundations
Structural evaluation5: Somewhat better than minimum adequacy to tolerate being left in place as is
Deck geometry7: Better than present minimum criteria
Waterway adequacy8: Equal to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating54 US tons
Inventory rating32 US tons

Structure

Structure typeTee Beam
MaterialConcrete
DeckConcrete, cast-in-place
Main spans1
Design loadHS 20
Structure length26 ft (7.9 m)
Longest span24 ft (7.3 m)
Deck width44 ft (13.3 m)
Roadway width41 ft (12.4 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic15,250 (2023)
Projected traffic22,875 by 2042
Trucks20%
Lanes on structure2
Traffic directionOne-way traffic
CarriesHighway
CrossesWaterway
Detour if closed1.2 mi (2 km)
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 proposedReplacement because of substandard load-carrying capacity or roadway geometry
Estimated improvement cost$489,000 (2020 estimate)
NavigationNo navigation control on waterway

Frequently asked questions

When was I 84 Wbl over Indian Creek built?

It was built in 1960, making it 65 years old in 2025. It was reconstructed in 1980.

What condition is I 84 Wbl 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 April 2024.

How much traffic does I 84 Wbl over Indian Creek carry?

About 15,250 vehicles per day (2023 count), of which roughly 20% are trucks.

How long is I 84 Wbl over Indian Creek?

The structure is 26 ft (7.9 m) long with a longest span of 24 ft (7.3 m) and a deck 44 ft wide.

Who owns I 84 Wbl over Indian Creek?

It is owned by the State Highway Agency.