US Bridges

Sma 7406;17th ST over Butte Arm Canal

Fair

Bonneville County, Idaho · In Idaho Falls · Structure no. 000000000021575

Built
1959
66 years old
Condition
Fair
inspected March 2023
Type
Frame
Concrete
Length
45 ft
1 main span
Daily traffic
22,500
2023 count
Owner
City
City or Municipal Highway Agency

About this bridge

Sma 7406;17th ST over Butte Arm Canal is a concrete frame carrying Sma 7406;17th ST over Butte Arm Canal in Bonneville 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 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 22,500 vehicles a day, roughly 1% of them trucks, projected to reach 33,750 by 2042. The structure is 45 ft (13.7 m) long and 70 ft wide. If it were closed, the detour would be 1.2 mi (2 km).

Location

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CarriesSma 7406;17th ST
CrossesButte Arm Canal
LocationIn Idaho Falls
RouteCity Street 7406
CountyBonneville County
StateIdaho
Coordinates43.48258, -112.03394
Functional classUrban 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.
Substructure6 SatisfactoryStructural elements show some minor deterioration.
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 geometry4: Meets minimum tolerable limits to be left in place as is
Waterway adequacy9: Superior to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating53 US tons
Inventory rating32 US tons

Structure

Structure typeFrame
MaterialConcrete
DeckConcrete, cast-in-place
Main spans1
Design loadH 20
Structure length45 ft (13.7 m)
Longest span45 ft (13.6 m)
Deck width70 ft (21.3 m)
Roadway width62 ft (18.9 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic22,500 (2023)
Projected traffic33,750 by 2042
Trucks1%
Lanes on structure5
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed1.2 mi (2 km)
TollOn a free road
National Highway SystemNo

Ownership and planned work

OwnerCity or Municipal Highway Agency
Maintained byCity or Municipal Highway Agency
Historic statusHistorical significance not determinable at this time
Work proposedReplacement because of substandard load-carrying capacity or roadway geometry
Estimated improvement cost$990,000 (2019 estimate)
NavigationNo navigation control on waterway

Frequently asked questions

When was Sma 7406;17th ST over Butte Arm Canal built?

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

What condition is Sma 7406;17th ST over Butte Arm 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 7406;17th ST over Butte Arm Canal carry?

About 22,500 vehicles per day (2023 count), of which roughly 1% are trucks.

How long is Sma 7406;17th ST over Butte Arm Canal?

The structure is 45 ft (13.7 m) long with a longest span of 45 ft (13.6 m) and a deck 70 ft wide.

Who owns Sma 7406;17th ST over Butte Arm Canal?

It is owned by the City or Municipal Highway Agency.