US Bridges

SMA7812;100 S. Rd. over A Canal

Fair

Minidoka County, Idaho · 1.0 S. 0.8 E. Rupert · Structure no. 000000000025210

Built
1973
52 years old
Condition
Fair
inspected March 2023
Type
Tee Beam
Prestressed Concrete
Length
44 ft
1 main span
Daily traffic
1,300
2023 count
Owner
County
County Highway Agency

About this bridge

SMA7812;100 S. Rd. over A Canal is a prestressed concrete tee beam carrying SMA7812;100 S. Rd. over A Canal in Minidoka County, Idaho. It was built in 1973, so it is 52 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 1,300 vehicles a day, roughly 6% of them trucks, projected to reach 1,950 by 2042. The structure is 44 ft (13.4 m) long and 30 ft wide. If it were closed, the detour would be 1.9 mi (3 km).

Location

Open in Google Maps
CarriesSMA7812;100 S. Rd.
CrossesA Canal
Location1.0 S. 0.8 E. Rupert
RouteCounty Highway 7812
CountyMinidoka County
StateIdaho
Coordinates42.60514, -113.65297
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.
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 alignment6: Equal to present minimum criteria
Operating rating38 US tons
Inventory rating23 US tons

Structure

Structure typeTee Beam
MaterialPrestressed Concrete
DeckConcrete, cast-in-place
Main spans1
Design loadH 15
Structure length44 ft (13.4 m)
Longest span42 ft (12.8 m)
Deck width30 ft (9.1 m)
Roadway width28 ft (8.5 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic1,300 (2023)
Projected traffic1,950 by 2042
Trucks6%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed1.9 mi (3 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$708,000 (2017 estimate)
NavigationNo navigation control on waterway

Frequently asked questions

When was SMA7812;100 S. Rd. over A Canal built?

It was built in 1973, making it 52 years old in 2025.

What condition is SMA7812;100 S. Rd. over A 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 SMA7812;100 S. Rd. over A Canal carry?

About 1,300 vehicles per day (2023 count), of which roughly 6% are trucks.

How long is SMA7812;100 S. Rd. over A Canal?

The structure is 44 ft (13.4 m) long with a longest span of 42 ft (12.8 m) and a deck 30 ft wide.

Who owns SMA7812;100 S. Rd. over A Canal?

It is owned by the County Highway Agency.