US Bridges

Sma 7856;N 1000 E over Teton Island Canal

Fair

Madison County, Idaho · 2.4 N. 1.6 E. Rexburg · Structure no. 000000000032905

Built
1977
48 years old
Condition
Fair
inspected March 2023
Type
Frame
Concrete
Length
22 ft
1 main span
Daily traffic
330
2023 count
Owner
County
County Highway Agency

About this bridge

Sma 7856;N 1000 E over Teton Island Canal is a concrete frame carrying Sma 7856;N 1000 E over Teton Island Canal in Madison County, Idaho. It was built in 1977, so it is 48 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 330 vehicles a day, roughly 6% of them trucks, projected to reach 495 by 2042. The structure is 22 ft (6.7 m) long and 30 ft wide. If it were closed, the detour would be 1.2 mi (2 km).

Location

Open in Google Maps
CarriesSma 7856;N 1000 E
CrossesTeton Island Canal
Location2.4 N. 1.6 E. Rexburg
RouteCounty Highway 7856
CountyMadison County
StateIdaho
Coordinates43.86203, -111.75794
Functional classRural Minor Arterial

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.
Substructure7 GoodSome minor problems.
Channel and channel protection8 Very GoodNo problems noted.
Last inspectionMarch 2023
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 adequacy7: Better than present minimum criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating38 US tons
Inventory rating23 US tons

Structure

Structure typeFrame
MaterialConcrete
DeckConcrete, cast-in-place
Main spans1
Design loadHS 20
Structure length22 ft (6.7 m)
Longest span22 ft (6.7 m)
Deck width30 ft (9.1 m)
Roadway width26 ft (7.9 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic330 (2023)
Projected traffic495 by 2042
Trucks6%
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 proposedReplacement because of substandard load-carrying capacity or roadway geometry
Estimated improvement cost$374,000 (2023 estimate)
NavigationNo navigation control on waterway

Frequently asked questions

When was Sma 7856;N 1000 E over Teton Island Canal built?

It was built in 1977, making it 48 years old in 2025.

What condition is Sma 7856;N 1000 E over Teton 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 2023.

How much traffic does Sma 7856;N 1000 E over Teton Island Canal carry?

About 330 vehicles per day (2023 count), of which roughly 6% are trucks.

How long is Sma 7856;N 1000 E over Teton Island Canal?

The structure is 22 ft (6.7 m) long with a longest span of 22 ft (6.7 m) and a deck 30 ft wide.

Who owns Sma 7856;N 1000 E over Teton Island Canal?

It is owned by the County Highway Agency.