US Bridges

N 26th W over Great Western Canal

Fair

Bonneville County, Idaho · 3.0 N. 2.2 W. Idaho Falls · Structure no. 000000000031230

Built
1928
97 years old
Condition
Fair
inspected November 2023
Type
Stringer/Multi-beam or Girder
Concrete
Length
53 ft
2 main spans
Daily traffic
480
2023 count
Owner
County
County Highway Agency

About this bridge

N 26th W over Great Western Canal is a concrete stringer/multi-beam or girder carrying N 26th W over Great Western Canal in Bonneville County, Idaho. It was built in 1928, so it is 97 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 480 vehicles a day, roughly 23% of them trucks, projected to reach 720 by 2042. The structure is 53 ft (16.2 m) long and 28 ft wide. If it were closed, the detour would be 1.9 mi (3 km).

Location

Open in Google Maps
CarriesN 26th W
CrossesGreat Western Canal
Location3.0 N. 2.2 W. Idaho Falls
RouteCounty Highway 0
CountyBonneville County
StateIdaho
Coordinates43.53339, -112.08303
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
Deck6 SatisfactoryStructural elements show some minor deterioration.
Superstructure6 SatisfactoryStructural elements show some minor deterioration.
Substructure6 SatisfactoryStructural elements show some minor deterioration.
Channel and channel protection7 GoodSome minor problems.
Last inspectionNovember 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation6: Equal to present minimum criteria
Deck geometry4: Meets minimum tolerable limits to be left in place as is
Waterway adequacy9: Superior to present desirable criteria
Approach roadway alignment7: Better than present minimum criteria
Operating rating48 US tons
Inventory rating29 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialConcrete
DeckConcrete, cast-in-place
Main spans2
Design loadH 20
Structure length53 ft (16.2 m)
Longest span26 ft (7.9 m)
Deck width28 ft (8.5 m)
Roadway width24 ft (7.4 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic480 (2023)
Projected traffic720 by 2042
Trucks23%
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$648,000 (2017 estimate)
NavigationNo navigation control on waterway

Frequently asked questions

When was N 26th W over Great Western Canal built?

It was built in 1928, making it 97 years old in 2025.

What condition is N 26th W over Great Western 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 2023.

How much traffic does N 26th W over Great Western Canal carry?

About 480 vehicles per day (2023 count), of which roughly 23% are trucks.

How long is N 26th W over Great Western Canal?

The structure is 53 ft (16.2 m) long with a longest span of 26 ft (7.9 m) and a deck 28 ft wide.

Who owns N 26th W over Great Western Canal?

It is owned by the County Highway Agency.