US Bridges

I 84 Ebl & Wbl over Ridenbaugh Canal

Fair

Ada County, Idaho · 6.7 W. Boise · Structure no. 000000000015680

Built
1966
59 years old, rebuilt 1994
Condition
Fair
inspected February 2024
Type
Stringer/Multi-beam or Girder
Concrete
Length
30 ft
1 main span
Daily traffic
144,500
2023 count
Owner
State
State Highway Agency

About this bridge

I 84 Ebl & Wbl over Ridenbaugh Canal is a concrete stringer/multi-beam or girder carrying I 84 Ebl & Wbl over Ridenbaugh Canal in Ada County, Idaho. It was built in 1966 and reconstructed in 1994, so it is 59 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 144,500 vehicles a day, roughly 12% of them trucks, projected to reach 216,750 by 2042. The structure is 30 ft (9.1 m) long and 144 ft wide. If it were closed, the detour would be 1.2 mi (2 km).

Location

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CarriesI 84 Ebl & Wbl
CrossesRidenbaugh Canal
Location6.7 W. Boise
RouteInterstate 84
CountyAda County
StateIdaho
Coordinates43.59728, -116.34014
Functional classUrban 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.
Superstructure7 GoodSome minor problems.
Substructure6 SatisfactoryStructural elements show some minor deterioration.
Channel and channel protection7 GoodSome minor problems.
Last inspectionFebruary 2024
Inspection intervalevery 48 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation6: Equal to present minimum criteria
Deck geometry9: Superior to present desirable criteria
Waterway adequacy8: Equal to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating59 US tons
Inventory rating35.1 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialConcrete
DeckConcrete, cast-in-place
Main spans1
Design loadHS 20
Structure length30 ft (9.1 m)
Longest span28 ft (8.5 m)
Deck width144 ft (44 m)
Roadway width140 ft (42.7 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic144,500 (2023)
Projected traffic216,750 by 2042
Trucks12%
Lanes on structure8
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
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—
NavigationNo navigation control on waterway

Frequently asked questions

When was I 84 Ebl & Wbl over Ridenbaugh Canal built?

It was built in 1966, making it 59 years old in 2025. It was reconstructed in 1994.

What condition is I 84 Ebl & Wbl over Ridenbaugh 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 February 2024.

How much traffic does I 84 Ebl & Wbl over Ridenbaugh Canal carry?

About 144,500 vehicles per day (2023 count), of which roughly 12% are trucks.

How long is I 84 Ebl & Wbl over Ridenbaugh Canal?

The structure is 30 ft (9.1 m) long with a longest span of 28 ft (8.5 m) and a deck 144 ft wide.

Who owns I 84 Ebl & Wbl over Ridenbaugh Canal?

It is owned by the State Highway Agency.