US Bridges

STC1838;STERLING W over Low Line Canal

FairPosted for load

Bingham County, Idaho · 2.4 W. Sterling · Structure no. 000000000022550

Built
1983
42 years old
Condition
Fair
inspected November 2024
Type
Stringer/Multi-beam or Girder
Steel
Length
33 ft
1 main span
Daily traffic
60
2023 count
Owner
County
County Highway Agency

About this bridge

STC1838;STERLING W over Low Line Canal is a steel stringer/multi-beam or girder carrying STC1838;STERLING W over Low Line Canal in Bingham County, Idaho. It was built in 1983, so it is 42 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 6 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 60 vehicles a day, roughly 20% of them trucks, projected to reach 90 by 2042. The structure is 33 ft (10.1 m) long and 34 ft wide. If it were closed, the detour would be 1.9 mi (3 km).

Location

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CarriesSTC1838;STERLING W
CrossesLow Line Canal
Location2.4 W. Sterling
RouteCounty Highway 1838
CountyBingham County
StateIdaho
Coordinates43.03839, -112.78017
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
Deck6 SatisfactoryStructural elements show some minor deterioration.
Superstructure6 SatisfactoryStructural elements show some minor deterioration.
Substructure6 SatisfactoryStructural elements show some minor deterioration.
Channel and channel protection8 Very GoodNo problems noted.
Last inspectionNovember 2024
Inspection intervalevery 24 months
Operating statusPosted for load restriction
ScourFoundations stable; scour above top of footing
Structural evaluation5: Somewhat better than minimum adequacy to tolerate being left in place as is
Deck geometry7: Better than present minimum criteria
Waterway adequacy8: Equal to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating32 US tons
Inventory rating19 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialSteel
DeckConcrete, cast-in-place
Main spans1
Design loadHS 20
Structure length33 ft (10.1 m)
Longest span32 ft (9.8 m)
Deck width34 ft (10.4 m)
Roadway width31 ft (9.6 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic60 (2023)
Projected traffic90 by 2042
Trucks20%
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$450,000 (2019 estimate)
NavigationNo navigation control on waterway

Frequently asked questions

When was STC1838;STERLING W over Low Line Canal built?

It was built in 1983, making it 42 years old in 2025.

What condition is STC1838;STERLING W over Low Line 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 STC1838;STERLING W over Low Line Canal carry?

About 60 vehicles per day (2023 count), of which roughly 20% are trucks.

How long is STC1838;STERLING W over Low Line Canal?

The structure is 33 ft (10.1 m) long with a longest span of 32 ft (9.8 m) and a deck 34 ft wide.

Who owns STC1838;STERLING W over Low Line Canal?

It is owned by the County Highway Agency.