US Bridges

I 184 Ebl Connectr over US 20-26;BOISE Rv Slough

Fair

Ada County, Idaho · In Boise; Nwcl · Structure no. 000000000018996

Built
1991
34 years old
Condition
Fair
inspected June 2022
Type
Box Beam or Girders - Single or Spread
Prestressed Concrete Continuous
Length
622 ft
5 main spans
Daily traffic
28,250
2023 count
Owner
State
State Highway Agency

About this bridge

I 184 Ebl Connectr over US 20-26;BOISE Rv Slough is a prestressed concrete continuous box beam or girders - single or spread carrying I 184 Ebl Connectr over US 20-26;BOISE Rv Slough in Ada County, Idaho. It was built in 1991, so it is 34 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 28,250 vehicles a day, roughly 4% of them trucks, projected to reach 42,375 by 2042. The structure is 622 ft (189.6 m) long and 55 ft wide. If it were closed, the detour would be 1.2 mi (2 km).

Location

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CarriesI 184 Ebl Connectr
CrossesUS 20-26;BOISE Rv Slough
LocationIn Boise; Nwcl
RouteInterstate 184
CountyAda County
StateIdaho
Coordinates43.61847, -116.23403
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.
Superstructure6 SatisfactoryStructural elements show some minor deterioration.
Substructure7 GoodSome minor problems.
Channel and channel protection8 Very GoodNo problems noted.
Last inspectionJune 2022
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 adequacy9: Superior to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating70 US tons
Inventory rating37 US tons

Structure

Structure typeBox Beam or Girders - Single or Spread
MaterialPrestressed Concrete Continuous
DeckConcrete, cast-in-place
Main spans5
Design loadHS 25 or greater
Structure length622 ft (189.6 m)
Longest span150 ft (45.7 m)
Deck width55 ft (16.9 m)
Roadway width52 ft (16 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic28,250 (2023)
Projected traffic42,375 by 2042
Trucks4%
Lanes on structure3
Traffic directionOne-way traffic
CarriesHighway
CrossesHighway and waterway
Detour if closed1.2 mi (2 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—
NavigationNo navigation control on waterway

Frequently asked questions

When was I 184 Ebl Connectr over US 20-26;BOISE Rv Slough built?

It was built in 1991, making it 34 years old in 2025.

What condition is I 184 Ebl Connectr over US 20-26;BOISE Rv Slough 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 June 2022.

How much traffic does I 184 Ebl Connectr over US 20-26;BOISE Rv Slough carry?

About 28,250 vehicles per day (2023 count), of which roughly 4% are trucks.

How long is I 184 Ebl Connectr over US 20-26;BOISE Rv Slough?

The structure is 622 ft (189.6 m) long with a longest span of 150 ft (45.7 m) and a deck 55 ft wide.

Who owns I 184 Ebl Connectr over US 20-26;BOISE Rv Slough?

It is owned by the State Highway Agency.