US Bridges

Stc 6743 (e 200 N) over Market Lake Canal

Good

Jefferson County, Idaho · 4.5 S. 0.7 E. Roberts · Structure no. 000000000032410

Built
1959
66 years old
Condition
Good
inspected March 2023
Type
Frame
Concrete
Length
21 ft
1 main span
Daily traffic
810
2023 count
Owner
County
County Highway Agency

About this bridge

Stc 6743 (e 200 N) over Market Lake Canal is a concrete frame carrying Stc 6743 (e 200 N) over Market Lake Canal in Jefferson County, Idaho. It was built in 1959, so it is 66 years old, older than the Idaho average of 45.3 years.

The most recent inspection reported to the Federal Highway Administration rates it in good condition with a lowest component rating of 7 out of 9. All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted.

It carries about 810 vehicles a day, roughly 3% of them trucks, projected to reach 1,215 by 2042. The structure is 21 ft (6.4 m) long and 30 ft wide. If it were closed, the detour would be 3.7 mi (6 km).

Location

Open in Google Maps
CarriesStc 6743 (e 200 N)
CrossesMarket Lake Canal
Location4.5 S. 0.7 E. Roberts
RouteCounty Highway 6743
CountyJefferson County
StateIdaho
Coordinates43.65519, -112.11411
Functional classRural Major Collector

Condition and inspection

Good

All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted.

ComponentRatingMeaning
Deck7 GoodSome minor problems.
Superstructure7 GoodSome minor problems.
Substructure7 GoodSome minor problems.
Channel and channel protection7 GoodSome minor problems.
Last inspectionMarch 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 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 rating34 US tons
Inventory rating20 US tons

Structure

Structure typeFrame
MaterialConcrete
DeckConcrete, cast-in-place
Main spans1
Design loadHS 20
Structure length21 ft (6.4 m)
Longest span21 ft (6.4 m)
Deck width30 ft (9.1 m)
Roadway width28 ft (8.5 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic810 (2023)
Projected traffic1,215 by 2042
Trucks3%
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$345,000 (2023 estimate)
NavigationNo navigation control on waterway

Frequently asked questions

When was Stc 6743 (e 200 N) over Market Lake Canal built?

It was built in 1959, making it 66 years old in 2025.

What condition is Stc 6743 (e 200 N) over Market Lake Canal in?

The National Bridge Inventory rates it in good condition. All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted. The last reported inspection was in March 2023.

How much traffic does Stc 6743 (e 200 N) over Market Lake Canal carry?

About 810 vehicles per day (2023 count), of which roughly 3% are trucks.

How long is Stc 6743 (e 200 N) over Market Lake Canal?

The structure is 21 ft (6.4 m) long with a longest span of 21 ft (6.4 m) and a deck 30 ft wide.

Who owns Stc 6743 (e 200 N) over Market Lake Canal?

It is owned by the County Highway Agency.