US Bridges

N Yellowstone HWY over Dry Bed Canal

Fair

Jefferson County, Idaho · 1.7 N. 1.2 E. Rigby · Structure no. 000000000032651

Built
1999
26 years old
Condition
Fair
inspected October 2023
Type
Stringer/Multi-beam or Girder
Steel
Length
81 ft
2 main spans
Daily traffic
3,500
2023 count
Owner
County
County Highway Agency

About this bridge

N Yellowstone HWY over Dry Bed Canal is a steel stringer/multi-beam or girder carrying N Yellowstone HWY over Dry Bed Canal in Jefferson County, Idaho. It was built in 1999, so it is 26 years old, younger 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 3,500 vehicles a day, projected to reach 5,250 by 2042. The structure is 81 ft (24.7 m) long and 40 ft wide. If it were closed, the detour would be 1.2 mi (2 km).

Location

Open in Google Maps
CarriesN Yellowstone HWY
CrossesDry Bed Canal
Location1.7 N. 1.2 E. Rigby
RouteCounty Highway 0
CountyJefferson County
StateIdaho
Coordinates43.69681, -111.89303
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.
Superstructure8 Very GoodNo problems noted.
Substructure7 GoodSome minor problems.
Channel and channel protection7 GoodSome minor problems.
Last inspectionOctober 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 adequacy8: Equal to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating72 US tons
Inventory rating43 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialSteel
DeckConcrete, cast-in-place
Main spans2
Design loadHS 25 or greater
Structure length81 ft (24.7 m)
Longest span40 ft (12.2 m)
Deck width40 ft (12.2 m)
Roadway width37 ft (11.4 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic3,500 (2023)
Projected traffic5,250 by 2042
Trucks0%
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 proposedNone recorded
Estimated improvement cost—
NavigationNo navigation control on waterway

Frequently asked questions

When was N Yellowstone HWY over Dry Bed Canal built?

It was built in 1999, making it 26 years old in 2025.

What condition is N Yellowstone HWY over Dry Bed 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 October 2023.

How much traffic does N Yellowstone HWY over Dry Bed Canal carry?

About 3,500 vehicles per day (2023 count).

How long is N Yellowstone HWY over Dry Bed Canal?

The structure is 81 ft (24.7 m) long with a longest span of 40 ft (12.2 m) and a deck 40 ft wide.

Who owns N Yellowstone HWY over Dry Bed Canal?

It is owned by the County Highway Agency.