US Bridges

400 North Road over Main Northside Canal

Good

Minidoka County, Idaho · 4.0 N 9.3E. Rupert · Structure no. 14MIN1001

Built
1980
45 years old
Condition
Good
inspected March 2023
Type
Stringer/Multi-beam or Girder
Prestressed Concrete
Length
80 ft
1 main span
Daily traffic
120
2023 count
Owner
Federal
Bureau of Reclamation

About this bridge

400 North Road over Main Northside Canal is a prestressed concrete stringer/multi-beam or girder carrying 400 North Road over Main Northside Canal in Minidoka County, Idaho. It was built in 1980, so it is 45 years old, younger 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 120 vehicles a day, projected to reach 120 by 2043. The structure is 80 ft (24.5 m) long and 29 ft wide. If it were closed, the detour would be 15.5 mi (25 km).

Carries400 North Road
CrossesMain Northside Canal
Location4.0 N 9.3E. Rupert
RouteCounty Highway 0
StateIdaho
Coordinates42.67645, -113.48899
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
Deck8 Very GoodNo problems noted.
Superstructure8 Very GoodNo problems noted.
Substructure7 GoodSome minor problems.
Channel and channel protection7 GoodSome minor problems.
Last inspectionMarch 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation7: Better than present minimum criteria
Deck geometry5: Somewhat better than minimum adequacy to tolerate being left in place as is
Waterway adequacy9: Superior to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating58.2 US tons
Inventory rating34.8 US tons

Structure

MaterialPrestressed Concrete
DeckConcrete, cast-in-place
Main spans1
Design loadHS 20
Structure length80 ft (24.5 m)
Longest span78 ft (23.9 m)
Deck width29 ft (8.8 m)
Roadway width26 ft (7.9 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic120 (2023)
Projected traffic120 by 2043
Trucks0%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed15.5 mi (25 km)
TollOn a free road
National Highway SystemNo

Ownership and planned work

OwnerBureau of Reclamation
Maintained byBureau of Reclamation
Historic statusNot eligible for the National Register of Historic Places
Work proposedNone recorded
Estimated improvement cost—
NavigationNo navigation control on waterway

Frequently asked questions

When was 400 North Road over Main Northside Canal built?

It was built in 1980, making it 45 years old in 2025.

What condition is 400 North Road over Main Northside 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 March 2023.

How much traffic does 400 North Road over Main Northside Canal carry?

About 120 vehicles per day (2023 count).

How long is 400 North Road over Main Northside Canal?

The structure is 80 ft (24.5 m) long with a longest span of 78 ft (23.9 m) and a deck 29 ft wide.

Who owns 400 North Road over Main Northside Canal?

It is owned by the Bureau of Reclamation.