US Bridges

E 400 N over Independent Canal

FairPosted for load

Fremont County, Idaho · 1.1 S. 1.4 W. Parker · Structure no. 000000000031990

Built
1960
65 years old
Condition
Fair
inspected November 2024
Type
Box Beam or Girders - Multiple
Prestressed Concrete
Length
35 ft
1 main span
Daily traffic
580
2023 count
Owner
County
County Highway Agency

About this bridge

E 400 N over Independent Canal is a prestressed concrete box beam or girders - multiple carrying E 400 N over Independent Canal in Fremont County, Idaho. It was built in 1960, so it is 65 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. Its operating status is: posted for load restriction.

It carries about 580 vehicles a day, roughly 2% of them trucks, projected to reach 870 by 2042. The structure is 35 ft (10.7 m) long and 25 ft wide. If it were closed, the detour would be 1.2 mi (2 km).

Location

Open in Google Maps
CarriesE 400 N
CrossesIndependent Canal
Location1.1 S. 1.4 W. Parker
RouteCounty Highway 0
CountyFremont County
StateIdaho
Coordinates43.94144, -111.78653
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
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.
Substructure5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Channel and channel protection7 GoodSome minor problems.
Last inspectionNovember 2024
Inspection intervalevery 24 months
Operating statusPosted for load restriction
ScourFoundations stable; scour above top of footing
Structural evaluation4: Meets minimum tolerable limits to be left in place as is
Deck geometry4: Meets minimum tolerable limits to be left in place as is
Waterway adequacy8: Equal to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating30 US tons
Inventory rating18 US tons

Structure

Structure typeBox Beam or Girders - Multiple
MaterialPrestressed Concrete
DeckConcrete, cast-in-place
Main spans1
Design loadH 15
Structure length35 ft (10.7 m)
Longest span32 ft (9.8 m)
Deck width25 ft (7.7 m)
Roadway width24 ft (7.2 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic580 (2023)
Projected traffic870 by 2042
Trucks2%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed1.2 mi (2 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$423,000 (2020 estimate)
NavigationNo navigation control on waterway

Frequently asked questions

When was E 400 N over Independent Canal built?

It was built in 1960, making it 65 years old in 2025.

What condition is E 400 N over Independent Canal 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 November 2024.

How much traffic does E 400 N over Independent Canal carry?

About 580 vehicles per day (2023 count), of which roughly 2% are trucks.

How long is E 400 N over Independent Canal?

The structure is 35 ft (10.7 m) long with a longest span of 32 ft (9.8 m) and a deck 25 ft wide.

Who owns E 400 N over Independent Canal?

It is owned by the County Highway Agency.