US Bridges

SMA3343;COLUMBIA over Ridenbaugh Canal

Fair

Ada County, Idaho · 2.8 N. 1.8 W. Kuna · Structure no. 000000000026186

Built
1993
32 years old
Condition
Fair
inspected November 2022
Type
Frame
Concrete
Length
26 ft
1 main span
Daily traffic
5,200
2023 count
Owner
County
County Highway Agency

About this bridge

SMA3343;COLUMBIA over Ridenbaugh Canal is a concrete frame carrying SMA3343;COLUMBIA over Ridenbaugh Canal in Ada County, Idaho. It was built in 1993, so it is 32 years old, younger 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 5,200 vehicles a day, projected to reach 7,800 by 2042. The structure is 26 ft (7.9 m) long and 43 ft wide. If it were closed, the detour would be 1.9 mi (3 km).

Location

Open in Google Maps
CarriesSMA3343;COLUMBIA
CrossesRidenbaugh Canal
Location2.8 N. 1.8 W. Kuna
RouteCounty Highway 3343
CountyAda County
StateIdaho
Coordinates43.53203, -116.45483
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 inspectionNovember 2022
Inspection intervalevery 48 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 adequacy9: Superior to present desirable criteria
Approach roadway alignment9: Superior to present desirable criteria
Operating rating110.1 US tons
Inventory rating80 US tons

Structure

Structure typeFrame
MaterialConcrete
DeckConcrete, cast-in-place
Main spans1
Design loadHS 25 or greater
Structure length26 ft (7.9 m)
Longest span26 ft (7.9 m)
Deck width43 ft (13.1 m)
Roadway width40 ft (12.2 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic5,200 (2023)
Projected traffic7,800 by 2042
Trucks0%
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 proposedNone recorded
Estimated improvement cost—
NavigationNo navigation control on waterway

Frequently asked questions

When was SMA3343;COLUMBIA over Ridenbaugh Canal built?

It was built in 1993, making it 32 years old in 2025.

What condition is SMA3343;COLUMBIA over Ridenbaugh 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 November 2022.

How much traffic does SMA3343;COLUMBIA over Ridenbaugh Canal carry?

About 5,200 vehicles per day (2023 count).

How long is SMA3343;COLUMBIA over Ridenbaugh Canal?

The structure is 26 ft (7.9 m) long with a longest span of 26 ft (7.9 m) and a deck 43 ft wide.

Who owns SMA3343;COLUMBIA over Ridenbaugh Canal?

It is owned by the County Highway Agency.