US Bridges

Stc 1847; Fir Road over Government Canal

Fair

Bingham County, Idaho · 1.2 W. Shelley · Structure no. 000000000019280

Built
1980
45 years old
Condition
Fair
inspected March 2024
Type
Culvert
Steel
Length
60 ft
1 main span
Daily traffic
3,300
2023 count
Owner
County
County Highway Agency

About this bridge

Stc 1847; Fir Road over Government Canal is a steel culvert carrying Stc 1847; Fir Road over Government Canal in Bingham 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 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 3,300 vehicles a day, roughly 10% of them trucks, projected to reach 4,950 by 2042. The structure is 60 ft (18.3 m) long and 94 ft wide. If it were closed, the detour would be 6.2 mi (10 km).

Location

Open in Google Maps
CarriesStc 1847; Fir Road
CrossesGovernment Canal
Location1.2 W. Shelley
RouteCounty Highway 1847
CountyBingham County
StateIdaho
Coordinates43.37392, -112.15194
Functional classRural Major Collector

Condition and inspection

Fair

The lowest-rated primary component is rated 5 or 6. Minor deterioration is present but the structure is sound.

ComponentRatingMeaning
Channel and channel protection7 GoodSome minor problems.
Culvert5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Last inspectionMarch 2024
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 adequacy6: Equal to present minimum criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating52 US tons
Inventory rating37 US tons

Structure

Structure typeCulvert
MaterialSteel
DeckNot applicable
Main spans1
Design loadHS 20
Structure length60 ft (18.3 m)
Longest span60 ft (18.3 m)
Deck width94 ft (28.5 m)
Roadway width42 ft (12.8 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic3,300 (2023)
Projected traffic4,950 by 2042
Trucks10%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed6.2 mi (10 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$653,000 (2020 estimate)
NavigationNo navigation control on waterway

Frequently asked questions

When was Stc 1847; Fir Road over Government Canal built?

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

What condition is Stc 1847; Fir Road over Government 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 March 2024.

How much traffic does Stc 1847; Fir Road over Government Canal carry?

About 3,300 vehicles per day (2023 count), of which roughly 10% are trucks.

How long is Stc 1847; Fir Road over Government Canal?

The structure is 60 ft (18.3 m) long with a longest span of 60 ft (18.3 m) and a deck 94 ft wide.

Who owns Stc 1847; Fir Road over Government Canal?

It is owned by the County Highway Agency.