US Bridges

Sand Hollow Road over I 84;SAND Hollow RD Gs

Fair

Canyon County, Idaho · 6.3 W. Caldwell · Structure no. 000000000027580

Built
1962
63 years old
Condition
Fair
inspected June 2023
Type
Stringer/Multi-beam or Girder
Prestressed Concrete
Length
228 ft
3 main spans
Daily traffic
30,500
2023 count
Owner
State
State Highway Agency

About this bridge

Sand Hollow Road over I 84;SAND Hollow RD Gs is a prestressed concrete stringer/multi-beam or girder carrying Sand Hollow Road over I 84;SAND Hollow RD Gs 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 30,500 vehicles a day, roughly 23% of them trucks, projected to reach 675 by 2042. The structure is 228 ft (69.5 m) long and 29 ft wide. If it were closed, the detour would be 14.9 mi (24 km).

Location

Open in Google Maps
CarriesSand Hollow Road
CrossesI 84;SAND Hollow RD Gs
Location6.3 W. Caldwell
RouteCounty Highway 0
CountyCanyon County
StateIdaho
Coordinates43.77725, -116.72553
Functional classRural 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
Deck7 GoodSome minor problems.
Superstructure6 SatisfactoryStructural elements show some minor deterioration.
Substructure6 SatisfactoryStructural elements show some minor deterioration.
Last inspectionJune 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourBridge not over waterway
Structural evaluation6: Equal to present minimum criteria
Deck geometry2: Basically intolerable, requiring high priority of replacement
Approach roadway alignment8: Equal to present desirable criteria
Operating rating55 US tons
Inventory rating33 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialPrestressed Concrete
DeckConcrete, cast-in-place
Main spans3 (+2 approach)
Design loadHS 20
Structure length228 ft (69.5 m)
Longest span49 ft (14.8 m)
Deck width29 ft (8.7 m)
Roadway width24 ft (7.3 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic30,500 (2023)
Projected traffic675 by 2042
Trucks23%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesHighway
Detour if closed14.9 mi (24 km)
TollOn a free road
National Highway SystemNo

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$220,000 (2023 estimate)
NavigationNot applicable (no waterway)

Frequently asked questions

When was Sand Hollow Road over I 84;SAND Hollow RD Gs built?

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

What condition is Sand Hollow Road over I 84;SAND Hollow RD Gs 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 June 2023.

How much traffic does Sand Hollow Road over I 84;SAND Hollow RD Gs carry?

About 30,500 vehicles per day (2023 count), of which roughly 23% are trucks.

How long is Sand Hollow Road over I 84;SAND Hollow RD Gs?

The structure is 228 ft (69.5 m) long with a longest span of 49 ft (14.8 m) and a deck 29 ft wide.

Who owns Sand Hollow Road over I 84;SAND Hollow RD Gs?

It is owned by the State Highway Agency.