US Bridges

I 84 over Juniper Rd;gs NO.1

Fair

Cassia County, Idaho · 3.1 E. Sublett · Structure no. 000000000016470

Built
1968
57 years old, rebuilt 1973
Condition
Fair
inspected April 2023
Type
Frame
Concrete
Length
24 ft
1 main span
Daily traffic
11,000
2023 count
Owner
State
State Highway Agency

About this bridge

I 84 over Juniper Rd;gs NO.1 is a concrete frame carrying I 84 over Juniper Rd;gs NO.1 in Cassia County, Idaho. It was built in 1968 and reconstructed in 1973, 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 11,000 vehicles a day, roughly 77% of them trucks, projected to reach 16,500 by 2042. The structure is 24 ft (7.3 m) long and 173 ft wide. If it were closed, the detour would be 9.9 mi (16 km).

Location

Open in Google Maps
CarriesI 84
CrossesJuniper Rd;gs NO.1
Location3.1 E. Sublett
RouteInterstate 84
CountyCassia County
StateIdaho
Coordinates42.29461, -113.17342
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.
Last inspectionApril 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourBridge not over waterway
Structural evaluation5: Somewhat better than minimum adequacy to tolerate being left in place as is
Deck geometry9: Superior to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating74 US tons
Inventory rating44 US tons

Structure

Structure typeFrame
MaterialConcrete
DeckConcrete, cast-in-place
Main spans1
Design loadHS 20
Structure length24 ft (7.3 m)
Longest span24 ft (7.3 m)
Deck width173 ft (52.7 m)
Roadway width91 ft (27.7 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic11,000 (2023)
Projected traffic16,500 by 2042
Trucks77%
Lanes on structure4
Traffic directionTwo-way traffic
CarriesHighway
CrossesHighway
Detour if closed9.9 mi (16 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$426,000 (2021 estimate)
NavigationNot applicable (no waterway)

Frequently asked questions

When was I 84 over Juniper Rd;gs NO.1 built?

It was built in 1968, making it 57 years old in 2025. It was reconstructed in 1973.

What condition is I 84 over Juniper Rd;gs NO.1 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 2023.

How much traffic does I 84 over Juniper Rd;gs NO.1 carry?

About 11,000 vehicles per day (2023 count), of which roughly 77% are trucks.

How long is I 84 over Juniper Rd;gs NO.1?

The structure is 24 ft (7.3 m) long with a longest span of 24 ft (7.3 m) and a deck 173 ft wide.

Who owns I 84 over Juniper Rd;gs NO.1?

It is owned by the State Highway Agency.