US Bridges

I 184 Ebl over I 84 Wbl

Good

Ada County, Idaho · 4.3 W. Boise · Structure no. 000000000018946

Built
2001
24 years old
Condition
Good
inspected January 2022
Type
Stringer/Multi-beam or Girder
Steel
Length
155 ft
1 main span
Daily traffic
68,500
2023 count
Owner
State
State Highway Agency

About this bridge

I 184 Ebl over I 84 Wbl is a steel stringer/multi-beam or girder carrying I 184 Ebl over I 84 Wbl in Ada County, Idaho. It was built in 2001, so it is 24 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 7 out of 9. All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted.

It carries about 68,500 vehicles a day, roughly 4% of them trucks, projected to reach 102,750 by 2042. The structure is 155 ft (47.2 m) long and 302 ft wide. If it were closed, the detour would be 3.1 mi (5 km).

Location

Open in Google Maps
CarriesI 184 Ebl
CrossesI 84 Wbl
Location4.3 W. Boise
RouteInterstate 184
CountyAda County
StateIdaho
Coordinates43.597, -116.29169
Functional classUrban Principal Arterial - Interstate

Condition and inspection

Good

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

ComponentRatingMeaning
Deck7 GoodSome minor problems.
Superstructure8 Very GoodNo problems noted.
Substructure8 Very GoodNo problems noted.
Last inspectionJanuary 2022
Inspection intervalevery 48 months
Operating statusOpen, no restriction
ScourBridge not over waterway
Structural evaluation8: Equal to present desirable criteria
Deck geometry7: Better than present minimum criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating110.1 US tons
Inventory rating75.9 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialSteel
DeckConcrete, cast-in-place
Main spans1
Design loadHS 25 or greater
Structure length155 ft (47.2 m)
Longest span149 ft (45.4 m)
Deck width302 ft (92.1 m)
Roadway width60 ft (18.3 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic68,500 (2023)
Projected traffic102,750 by 2042
Trucks4%
Lanes on structure3
Traffic directionOne-way traffic
CarriesOverpass structure at an interchange
CrossesHighway
Detour if closed3.1 mi (5 km)
TollOn a free road
National Highway SystemYes

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 184 Ebl over I 84 Wbl built?

It was built in 2001, making it 24 years old in 2025.

What condition is I 184 Ebl over I 84 Wbl 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 January 2022.

How much traffic does I 184 Ebl over I 84 Wbl carry?

About 68,500 vehicles per day (2023 count), of which roughly 4% are trucks.

How long is I 184 Ebl over I 84 Wbl?

The structure is 155 ft (47.2 m) long with a longest span of 149 ft (45.4 m) and a deck 302 ft wide.

Who owns I 184 Ebl over I 84 Wbl?

It is owned by the State Highway Agency.