US Bridges

SMA3340;MCDERMMOTT over Ridenbaugh High Line Cnl

Fair

Canyon County, Idaho · 2.0 N. 2.7 W. Kuna · Structure no. 000000000026100

Built
1987
38 years old
Condition
Fair
inspected March 2021
Type
Culvert
Concrete
Length
25 ft
1 main span
Daily traffic
300
2023 count
Owner
Local
Other Local Agency

About this bridge

SMA3340;MCDERMMOTT over Ridenbaugh High Line Cnl is a concrete culvert carrying SMA3340;MCDERMMOTT over Ridenbaugh High Line Cnl in Canyon County, Idaho. It was built in 1987, so it is 38 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 300 vehicles a day, projected to reach 450 by 2042. The structure is 25 ft (7.6 m) long and 34 ft wide. If it were closed, the detour would be 1.9 mi (3 km).

Location

Open in Google Maps
CarriesSMA3340;MCDERMMOTT
CrossesRidenbaugh High Line Cnl
Location2.0 N. 2.7 W. Kuna
RouteCounty Highway 3340
CountyCanyon County
StateIdaho
Coordinates43.52056, -116.47361
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
Channel and channel protection8 Very GoodNo problems noted.
Culvert6 SatisfactoryStructural elements show some minor deterioration.
Last inspectionMarch 2021
Inspection intervalevery 48 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation6: Equal to present minimum criteria
Deck geometry6: Equal to present minimum criteria
Waterway adequacy9: Superior to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating110.1 US tons
Inventory rating110.1 US tons

Structure

Structure typeCulvert
MaterialConcrete
DeckConcrete, cast-in-place
Main spans1
Design loadHS 20
Structure length25 ft (7.6 m)
Longest span25 ft (7.6 m)
Deck width34 ft (10.4 m)
Roadway width31 ft (9.3 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic300 (2023)
Projected traffic450 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

OwnerOther Local Agency
Maintained byOther Local 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 SMA3340;MCDERMMOTT over Ridenbaugh High Line Cnl built?

It was built in 1987, making it 38 years old in 2025.

What condition is SMA3340;MCDERMMOTT over Ridenbaugh High Line Cnl 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 2021.

How much traffic does SMA3340;MCDERMMOTT over Ridenbaugh High Line Cnl carry?

About 300 vehicles per day (2023 count).

How long is SMA3340;MCDERMMOTT over Ridenbaugh High Line Cnl?

The structure is 25 ft (7.6 m) long with a longest span of 25 ft (7.6 m) and a deck 34 ft wide.

Who owns SMA3340;MCDERMMOTT over Ridenbaugh High Line Cnl?

It is owned by the Other Local Agency.