US Bridges

S3784;LOCUST Grove over Kuna Canal

Fair

Ada County, Idaho · 0.1 N. 2.3 E. Kuna · Structure no. 000000000025780

Built
1949
76 years old, rebuilt 1969
Condition
Fair
inspected November 2021
Type
Tee Beam
Prestressed Concrete
Length
22 ft
1 main span
Daily traffic
620
2023 count
Owner
County
County Highway Agency

About this bridge

S3784;LOCUST Grove over Kuna Canal is a prestressed concrete tee beam carrying S3784;LOCUST Grove over Kuna Canal in Ada County, Idaho. It was built in 1949 and reconstructed in 1969, so it is 76 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 620 vehicles a day, roughly 11% of them trucks, projected to reach 930 by 2042. The structure is 22 ft (6.7 m) long and 30 ft wide. If it were closed, the detour would be 1.9 mi (3 km).

Location

Open in Google Maps
CarriesS3784;LOCUST Grove
CrossesKuna Canal
Location0.1 N. 2.3 E. Kuna
RouteCounty Highway 3784
CountyAda County
StateIdaho
Coordinates43.49247, -116.37428
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.
Superstructure8 Very GoodNo problems noted.
Substructure6 SatisfactoryStructural elements show some minor deterioration.
Channel and channel protection8 Very GoodNo problems noted.
Last inspectionNovember 2021
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 adequacy7: Better than present minimum criteria
Approach roadway alignment6: Equal to present minimum criteria
Operating rating48.6 US tons
Inventory rating34.7 US tons

Structure

Structure typeTee Beam
MaterialPrestressed Concrete
DeckConcrete, cast-in-place
Main spans1
Design loadHS 20
Structure length22 ft (6.7 m)
Longest span21 ft (6.4 m)
Deck width30 ft (9.1 m)
Roadway width28 ft (8.6 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic620 (2023)
Projected traffic930 by 2042
Trucks11%
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 S3784;LOCUST Grove over Kuna Canal built?

It was built in 1949, making it 76 years old in 2025. It was reconstructed in 1969.

What condition is S3784;LOCUST Grove over Kuna 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 2021.

How much traffic does S3784;LOCUST Grove over Kuna Canal carry?

About 620 vehicles per day (2023 count), of which roughly 11% are trucks.

How long is S3784;LOCUST Grove over Kuna Canal?

The structure is 22 ft (6.7 m) long with a longest span of 21 ft (6.4 m) and a deck 30 ft wide.

Who owns S3784;LOCUST Grove over Kuna Canal?

It is owned by the County Highway Agency.