US Bridges

Stc 6709;N 4200 E over Long Island Canal

Fair

Jefferson County, Idaho · 0.7 S. 0.2 W. Labelle · Structure no. 000000000032570

Built
1969
56 years old
Condition
Fair
inspected March 2024
Type
Tee Beam
Prestressed Concrete
Length
41 ft
1 main span
Daily traffic
170
2023 count
Owner
County
County Highway Agency

About this bridge

Stc 6709;N 4200 E over Long Island Canal is a prestressed concrete tee beam carrying Stc 6709;N 4200 E over Long Island Canal in Jefferson County, Idaho. It was built in 1969, so it is 56 years old, older 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 170 vehicles a day, roughly 13% of them trucks, projected to reach 255 by 2042. The structure is 41 ft (12.5 m) long and 28 ft wide. If it were closed, the detour would be 3.7 mi (6 km).

Location

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CarriesStc 6709;N 4200 E
CrossesLong Island Canal
Location0.7 S. 0.2 W. Labelle
RouteCounty Highway 6709
CountyJefferson County
StateIdaho
Coordinates43.69397, -111.86361
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
Deck7 GoodSome minor problems.
Superstructure7 GoodSome minor problems.
Substructure6 SatisfactoryStructural elements show some minor deterioration.
Channel and channel protection7 GoodSome minor problems.
Last inspectionMarch 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation6: Equal to 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 rating37.7 US tons
Inventory rating24.8 US tons

Structure

Structure typeTee Beam
MaterialPrestressed Concrete
DeckConcrete, precast panels
Main spans1
Design loadHS 15
Structure length41 ft (12.5 m)
Longest span40 ft (12.2 m)
Deck width28 ft (8.5 m)
Roadway width26 ft (8 m)
Vertical clearance over deck25 ft (7.6 m)

Traffic and service

Average daily traffic170 (2023)
Projected traffic255 by 2042
Trucks13%
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 proposedNone recorded
Estimated improvement cost—
NavigationNo navigation control on waterway

Frequently asked questions

When was Stc 6709;N 4200 E over Long Island Canal built?

It was built in 1969, making it 56 years old in 2025.

What condition is Stc 6709;N 4200 E over Long Island 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 6709;N 4200 E over Long Island Canal carry?

About 170 vehicles per day (2023 count), of which roughly 13% are trucks.

How long is Stc 6709;N 4200 E over Long Island Canal?

The structure is 41 ft (12.5 m) long with a longest span of 40 ft (12.2 m) and a deck 28 ft wide.

Who owns Stc 6709;N 4200 E over Long Island Canal?

It is owned by the County Highway Agency.