US Bridges

STC6803;S Ylwstone over Salem Union Canal

Fair

Fremont County, Idaho · 6.5 N Sugar City · Structure no. 000000000032216

Built
2002
23 years old
Condition
Fair
inspected April 2023
Type
Frame
Concrete
Length
23 ft
1 main span
Daily traffic
1,600
2023 count
Owner
County
County Highway Agency

About this bridge

STC6803;S Ylwstone over Salem Union Canal is a concrete frame carrying STC6803;S Ylwstone over Salem Union Canal in Fremont County, Idaho. It was built in 2002, so it is 23 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.

It carries about 1,600 vehicles a day, roughly 19% of them trucks, projected to reach 2,400 by 2042. The structure is 23 ft (7 m) long and 49 ft wide. If it were closed, the detour would be 1.2 mi (2 km).

Location

Open in Google Maps
CarriesSTC6803;S Ylwstone
CrossesSalem Union Canal
Location6.5 N Sugar City
RouteCounty Highway 6803
CountyFremont County
StateIdaho
Coordinates43.95414, -111.68756
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 protection7 GoodSome minor problems.
Last inspectionApril 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 adequacy8: Equal to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating38 US tons
Inventory rating23 US tons

Structure

Structure typeFrame
MaterialConcrete
DeckConcrete, precast panels
Main spans1
Design loadHS 20
Structure length23 ft (7 m)
Longest span23 ft (7 m)
Deck width49 ft (14.9 m)
Roadway width38 ft (11.5 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic1,600 (2023)
Projected traffic2,400 by 2042
Trucks19%
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 STC6803;S Ylwstone over Salem Union Canal built?

It was built in 2002, making it 23 years old in 2025.

What condition is STC6803;S Ylwstone over Salem Union 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 April 2023.

How much traffic does STC6803;S Ylwstone over Salem Union Canal carry?

About 1,600 vehicles per day (2023 count), of which roughly 19% are trucks.

How long is STC6803;S Ylwstone over Salem Union Canal?

The structure is 23 ft (7 m) long with a longest span of 23 ft (7 m) and a deck 49 ft wide.

Who owns STC6803;S Ylwstone over Salem Union Canal?

It is owned by the County Highway Agency.