US Bridges

300 West Road over B-4 Canal

Good

Minidoka County, Idaho · 1.1 S. 3.0 E. Paul · Structure no. 000000000025280

Built
1968
57 years old, rebuilt 2015
Condition
Good
inspected April 2021
Type
Slab
Concrete
Length
27 ft
1 main span
Daily traffic
100
2023 count
Owner
County
County Highway Agency

About this bridge

300 West Road over B-4 Canal is a concrete slab carrying 300 West Road over B-4 Canal in Minidoka County, Idaho. It was built in 1968 and reconstructed in 2015, 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 good condition with a lowest component rating of 7 out of 9. All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted.

It carries about 100 vehicles a day, roughly 10% of them trucks, projected to reach 150 by 2039. The structure is 27 ft (8.2 m) long and 36 ft wide. If it were closed, the detour would be 1.9 mi (3 km).

Carries300 West Road
CrossesB-4 Canal
Location1.1 S. 3.0 E. Paul
RouteCounty Highway 0
StateIdaho
Coordinates42.59, -113.72483
Functional classRural Local

Condition and inspection

Good

All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted.

ComponentRatingMeaning
Deck7 GoodSome minor problems.
Superstructure7 GoodSome minor problems.
Substructure7 GoodSome minor problems.
Channel and channel protection8 Very GoodNo problems noted.
Last inspectionApril 2021
Inspection intervalevery 48 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation6: Equal to present minimum criteria
Deck geometry9: Superior to present desirable criteria
Waterway adequacy8: Equal to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating32.5 US tons
Inventory rating25 US tons

Structure

Structure typeSlab
MaterialConcrete
DeckConcrete, precast panels
Main spans1
Design loadHL 93
Structure length27 ft (8.2 m)
Longest span26 ft (7.9 m)
Deck width36 ft (11 m)
Roadway width33 ft (10.2 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic100 (2023)
Projected traffic150 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

OwnerCounty Highway Agency
Maintained byCounty Highway Agency
Historic statusHistorical significance not determinable at this time
Work proposedReplacement because of substandard load-carrying capacity or roadway geometry
Estimated improvement cost$411,000 (2017 estimate)
NavigationNo navigation control on waterway

Frequently asked questions

When was 300 West Road over B-4 Canal built?

It was built in 1968, making it 57 years old in 2025. It was reconstructed in 2015.

What condition is 300 West Road over B-4 Canal in?

The National Bridge Inventory rates it in good condition. All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted. The last reported inspection was in April 2021.

How much traffic does 300 West Road over B-4 Canal carry?

About 100 vehicles per day (2023 count), of which roughly 10% are trucks.

How long is 300 West Road over B-4 Canal?

The structure is 27 ft (8.2 m) long with a longest span of 26 ft (7.9 m) and a deck 36 ft wide.

Who owns 300 West Road over B-4 Canal?

It is owned by the County Highway Agency.