US Bridges

N. Kay Avenue over Kuna Canal

Good

Ada County, Idaho · 0.8 E. 1.2 N. of Kuna · Structure no. 000000000026047

Built
2020
5 years old
Condition
Good
inspected October 2022
Type
Frame
Concrete
Length
21 ft
1 main span
Daily traffic
50
2023 count
Owner
County
County Highway Agency

About this bridge

N. Kay Avenue over Kuna Canal is a concrete frame carrying N. Kay Avenue over Kuna Canal in Ada County, Idaho. It was built in 2020, so it is 5 years old, younger 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 8 out of 9. All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted.

It carries about 50 vehicles a day, roughly 10% of them trucks, projected to reach 75 by 2040. The structure is 21 ft (6.4 m) long and 56 ft wide. If it were closed, the detour would be 1.9 mi (3 km).

Location

Open in Google Maps
CarriesN. Kay Avenue
CrossesKuna Canal
Location0.8 E. 1.2 N. of Kuna
RouteCity Street 0
CountyAda County
StateIdaho
Coordinates43.50864, -116.40375
Functional classUrban Local

Condition and inspection

Good

All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted.

ComponentRatingMeaning
Deck8 Very GoodNo problems noted.
Superstructure8 Very GoodNo problems noted.
Substructure8 Very GoodNo problems noted.
Channel and channel protection8 Very GoodNo problems noted.
Last inspectionOctober 2022
Inspection intervalevery 48 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation8: Equal to present desirable criteria
Deck geometry6: Equal to present minimum criteria
Waterway adequacy9: Superior to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating69.3 US tons
Inventory rating53.6 US tons

Structure

Structure typeFrame
MaterialConcrete
DeckConcrete, precast panels
Main spans1
Design loadHL 93
Structure length21 ft (6.4 m)
Longest span20 ft (6.1 m)
Deck width56 ft (17.2 m)
Roadway width26 ft (8 m)
Vertical clearance over deck100 ft (30.5 m)

Traffic and service

Average daily traffic50 (2023)
Projected traffic75 by 2040
Trucks10%
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 N. Kay Avenue over Kuna Canal built?

It was built in 2020, making it 5 years old in 2025.

What condition is N. Kay Avenue over Kuna Canal 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 October 2022.

How much traffic does N. Kay Avenue over Kuna Canal carry?

About 50 vehicles per day (2023 count), of which roughly 10% are trucks.

How long is N. Kay Avenue over Kuna Canal?

The structure is 21 ft (6.4 m) long with a longest span of 20 ft (6.1 m) and a deck 56 ft wide.

Who owns N. Kay Avenue over Kuna Canal?

It is owned by the County Highway Agency.