US Bridges

N 26th W over Osgood Canal

Fair

Bonneville County, Idaho · 3.88 NE Osgood · Structure no. 000000000036135

Built
1928
97 years old
Condition
Fair
inspected November 2023
Type
Frame
Concrete
Length
28 ft
1 main span
Daily traffic
20
2023 count
Owner
County
County Highway Agency

About this bridge

N 26th W over Osgood Canal is a concrete frame carrying N 26th W over Osgood 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 5 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 20 vehicles a day, roughly 1% of them trucks, projected to reach 30 by 2040. The structure is 28 ft (8.5 m) long and 29 ft wide. If it were closed, the detour would be 3.7 mi (6 km).

Location

Open in Google Maps
CarriesN 26th W
CrossesOsgood Canal
Location3.88 NE Osgood
RouteCounty Highway 0
CountyBonneville County
StateIdaho
Coordinates43.62481, -112.083
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 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation5: Somewhat better than minimum adequacy to tolerate being left in place as is
Deck geometry6: Equal to present minimum criteria
Waterway adequacy9: Superior to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating30 US tons
Inventory rating18 US tons

Structure

Structure typeFrame
MaterialConcrete
DeckConcrete, cast-in-place
Main spans1
Design loadH 15
Structure length28 ft (8.5 m)
Longest span26 ft (7.9 m)
Deck width29 ft (8.7 m)
Roadway width25 ft (7.5 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic20 (2023)
Projected traffic30 by 2040
Trucks1%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed3.7 mi (6 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$312,000 (2020 estimate)
NavigationNo navigation control on waterway

Frequently asked questions

When was N 26th W over Osgood Canal built?

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

What condition is N 26th W over Osgood 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 Osgood Canal carry?

About 20 vehicles per day (2023 count), of which roughly 1% are trucks.

How long is N 26th W over Osgood Canal?

The structure is 28 ft (8.5 m) long with a longest span of 26 ft (7.9 m) and a deck 29 ft wide.

Who owns N 26th W over Osgood Canal?

It is owned by the County Highway Agency.