US Bridges

Stc 1718;ARBON Vly over Bannock Cr.;michaud Br.

GoodPosted for load

Power County, Idaho · 15.6 N. Pauline · Structure no. 000000000019105

Built
1964
61 years old
Condition
Good
inspected April 2023
Type
Frame
Concrete
Length
23 ft
1 main span
Daily traffic
340
2023 count
Owner
County
County Highway Agency

About this bridge

Stc 1718;ARBON Vly over Bannock Cr.;michaud Br. is a concrete frame carrying Stc 1718;ARBON Vly over Bannock Cr.;michaud Br. in Power County, Idaho. It was built in 1964, so it is 61 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. Its operating status is: posted for load restriction.

It carries about 340 vehicles a day, roughly 17% of them trucks, projected to reach 510 by 2042. The structure is 23 ft (7 m) long and 30 ft wide. If it were closed, the detour would be 1.2 mi (2 km).

Location

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CarriesStc 1718;ARBON Vly
CrossesBannock Cr.;michaud Br.
Location15.6 N. Pauline
RouteCounty Highway 1718
CountyPower County
StateIdaho
Coordinates42.77411, -112.62469
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 inspectionApril 2023
Inspection intervalevery 24 months
Operating statusPosted for load 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 adequacy6: Equal to present minimum criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating31 US tons
Inventory rating18 US tons

Structure

Structure typeFrame
MaterialConcrete
DeckConcrete, cast-in-place
Main spans1
Design loadH 20
Structure length23 ft (7 m)
Longest span23 ft (7 m)
Deck width30 ft (9.1 m)
Roadway width28 ft (8.5 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic340 (2023)
Projected traffic510 by 2042
Trucks17%
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$450,000 (2019 estimate)
NavigationNo navigation control on waterway

Frequently asked questions

When was Stc 1718;ARBON Vly over Bannock Cr.;michaud Br. built?

It was built in 1964, making it 61 years old in 2025.

What condition is Stc 1718;ARBON Vly over Bannock Cr.;michaud Br. 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 April 2023.

How much traffic does Stc 1718;ARBON Vly over Bannock Cr.;michaud Br. carry?

About 340 vehicles per day (2023 count), of which roughly 17% are trucks.

How long is Stc 1718;ARBON Vly over Bannock Cr.;michaud Br.?

The structure is 23 ft (7 m) long with a longest span of 23 ft (7 m) and a deck 30 ft wide.

Who owns Stc 1718;ARBON Vly over Bannock Cr.;michaud Br.?

It is owned by the County Highway Agency.