US Bridges

I 84 Wbl over Sand Hollow Creek

Fair

Canyon County, Idaho · 8.3 W. Caldwell · Structure no. 000000000015430

Built
1962
63 years old
Condition
Fair
inspected October 2023
Type
Frame
Concrete
Length
26 ft
1 main span
Daily traffic
15,500
2023 count
Owner
State
State Highway Agency

About this bridge

I 84 Wbl over Sand Hollow Creek is a concrete frame carrying I 84 Wbl over Sand Hollow Creek in Canyon County, Idaho. It was built in 1962, so it is 63 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 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 15,500 vehicles a day, roughly 21% of them trucks, projected to reach 23,250 by 2042. The structure is 26 ft (7.8 m) long and 48 ft wide. If it were closed, the detour would be 1.2 mi (2 km).

Location

Open in Google Maps
CarriesI 84 Wbl
CrossesSand Hollow Creek
Location8.3 W. Caldwell
RouteInterstate 84
CountyCanyon County
StateIdaho
Coordinates43.80094, -116.74775
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
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 inspectionOctober 2023
Inspection intervalevery 48 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 adequacy8: Equal to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating70 US tons
Inventory rating42 US tons

Structure

Structure typeFrame
MaterialConcrete
DeckConcrete, cast-in-place
Main spans1
Design loadHS 20
Structure length26 ft (7.8 m)
Longest span23 ft (7 m)
Deck width48 ft (14.6 m)
Roadway width38 ft (11.6 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic15,500 (2023)
Projected traffic23,250 by 2042
Trucks21%
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 proposedNone recorded
Estimated improvement cost—
NavigationNo navigation control on waterway

Frequently asked questions

When was I 84 Wbl over Sand Hollow Creek built?

It was built in 1962, making it 63 years old in 2025.

What condition is I 84 Wbl over Sand Hollow 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 October 2023.

How much traffic does I 84 Wbl over Sand Hollow Creek carry?

About 15,500 vehicles per day (2023 count), of which roughly 21% are trucks.

How long is I 84 Wbl over Sand Hollow Creek?

The structure is 26 ft (7.8 m) long with a longest span of 23 ft (7 m) and a deck 48 ft wide.

Who owns I 84 Wbl over Sand Hollow Creek?

It is owned by the State Highway Agency.