US Bridges

2500 North Road over Salmon Lateral NO.21

Fair

Twin Falls County, Idaho · 0.5 N. 1.5 W. Hollister · Structure no. 000000000025425

Built
1970
55 years old
Condition
Fair
inspected February 2024
Type
Tee Beam
Prestressed Concrete
Length
32 ft
1 main span
Daily traffic
60
2023 count
Owner
Local
Other Local Agency

About this bridge

2500 North Road over Salmon Lateral NO.21 is a prestressed concrete tee beam carrying 2500 North Road over Salmon Lateral NO.21 in Twin Falls County, Idaho. It was built in 1970, so it is 55 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 60 vehicles a day, roughly 10% of them trucks, projected to reach 90 by 2039. The structure is 32 ft (9.8 m) long and 28 ft wide. If it were closed, the detour would be 1.9 mi (3 km).

Location

Open in Google Maps
Carries2500 North Road
CrossesSalmon Lateral NO.21
Location0.5 N. 1.5 W. Hollister
RouteCounty Highway 0
CountyTwin Falls County
StateIdaho
Coordinates42.36056, -114.60333
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.
Channel and channel protection8 Very GoodNo problems noted.
Last inspectionFebruary 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation6: Equal to present minimum criteria
Deck geometry6: Equal to present minimum criteria
Waterway adequacy7: Better than present minimum criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating38 US tons
Inventory rating23 US tons

Structure

Structure typeTee Beam
MaterialPrestressed Concrete
DeckConcrete, cast-in-place
Main spans1
Design loadHS 20
Structure length32 ft (9.8 m)
Longest span31 ft (9.4 m)
Deck width28 ft (8.5 m)
Roadway width27 ft (8.1 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic60 (2023)
Projected traffic90 by 2039
Trucks10%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed1.9 mi (3 km)
TollOn a free road
National Highway SystemNo

Ownership and planned work

OwnerOther Local Agency
Maintained byOther Local Agency
Historic statusHistorical significance not determinable at this time
Work proposedReplacement because of substandard load-carrying capacity or roadway geometry
Estimated improvement cost$495,000 (2020 estimate)
NavigationNo navigation control on waterway

Frequently asked questions

When was 2500 North Road over Salmon Lateral NO.21 built?

It was built in 1970, making it 55 years old in 2025.

What condition is 2500 North Road over Salmon Lateral NO.21 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 February 2024.

How much traffic does 2500 North Road over Salmon Lateral NO.21 carry?

About 60 vehicles per day (2023 count), of which roughly 10% are trucks.

How long is 2500 North Road over Salmon Lateral NO.21?

The structure is 32 ft (9.8 m) long with a longest span of 31 ft (9.4 m) and a deck 28 ft wide.

Who owns 2500 North Road over Salmon Lateral NO.21?

It is owned by the Other Local Agency.