US Bridges

I 84 Wbl over Kuna Rd; Blacks Creek RD

Fair

Ada County, Idaho · 9.2 E. Boise Ecl · Structure no. 000000000015781

Built
2020
5 years old
Condition
Fair
inspected October 2022
Type
Stringer/Multi-beam or Girder
Prestressed Concrete
Length
114 ft
1 main span
Daily traffic
15,000
2023 count
Owner
State
State Highway Agency

About this bridge

I 84 Wbl over Kuna Rd; Blacks Creek RD is a prestressed concrete stringer/multi-beam or girder carrying I 84 Wbl over Kuna Rd; Blacks Creek RD 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 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 15,000 vehicles a day, roughly 25% of them trucks, projected to reach 22,500 by 2042. The structure is 114 ft (34.7 m) long and 61 ft wide. If it were closed, the detour would be 1.2 mi (2 km).

Location

Open in Google Maps
CarriesI 84 Wbl
CrossesKuna Rd; Blacks Creek RD
Location9.2 E. Boise Ecl
RouteInterstate 84
CountyAda County
StateIdaho
Coordinates43.46317, -116.09183
Functional classRural Principal Arterial - Interstate

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.
Substructure8 Very GoodNo problems noted.
Last inspectionOctober 2022
Inspection intervalevery 48 months
Operating statusOpen, no restriction
ScourBridge not over waterway
Structural evaluation8: Equal to present desirable criteria
Deck geometry9: Superior to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating53.6 US tons
Inventory rating41.4 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialPrestressed Concrete
DeckConcrete, cast-in-place
Main spans1
Design loadHL 93
Structure length114 ft (34.7 m)
Longest span112 ft (34.1 m)
Deck width61 ft (18.7 m)
Roadway width58 ft (17.8 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic15,000 (2023)
Projected traffic22,500 by 2042
Trucks25%
Lanes on structure2
Traffic directionOne-way traffic
CarriesHighway
CrossesHighway
Detour if closed1.2 mi (2 km)
TollOn a free road
National Highway SystemYes
Strategic Highway NetworkInterstate STRAHNET route

Ownership and planned work

OwnerState Highway Agency
Maintained byState Highway Agency
Historic statusHistorical significance not determinable at this time
Work proposedNone recorded
Estimated improvement cost—
NavigationNot applicable (no waterway)

Frequently asked questions

When was I 84 Wbl over Kuna Rd; Blacks Creek RD built?

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

What condition is I 84 Wbl over Kuna Rd; Blacks Creek RD 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 October 2022.

How much traffic does I 84 Wbl over Kuna Rd; Blacks Creek RD carry?

About 15,000 vehicles per day (2023 count), of which roughly 25% are trucks.

How long is I 84 Wbl over Kuna Rd; Blacks Creek RD?

The structure is 114 ft (34.7 m) long with a longest span of 112 ft (34.1 m) and a deck 61 ft wide.

Who owns I 84 Wbl over Kuna Rd; Blacks Creek RD?

It is owned by the State Highway Agency.