US Bridges

I 184B Ebl & Wbl over S7403;UPRR;FRANKLIN Ic

Good

Ada County, Idaho · 1.0 W. Boise · Structure no. 000000000018956

Built
2001
24 years old
Condition
Good
inspected June 2023
Type
Stringer/Multi-beam or Girder
Steel Continuous
Length
428 ft
3 main spans
Daily traffic
76,500
2023 count
Owner
State
State Highway Agency

About this bridge

I 184B Ebl & Wbl over S7403;UPRR;FRANKLIN Ic is a steel continuous stringer/multi-beam or girder carrying I 184B Ebl & Wbl over S7403;UPRR;FRANKLIN Ic 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 76,500 vehicles a day, roughly 5% of them trucks, projected to reach 114,750 by 2042. The structure is 428 ft (130.5 m) long and 138 ft wide. If it were closed, the detour would be 1.2 mi (2 km).

Location

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CarriesI 184B Ebl & Wbl
CrossesS7403;UPRR;FRANKLIN Ic
Location1.0 W. Boise
RouteInterstate 184
CountyAda County
StateIdaho
Coordinates43.60464, -116.2785
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.
Superstructure7 GoodSome minor problems.
Substructure7 GoodSome minor problems.
Last inspectionJune 2023
Inspection intervalevery 48 months
Operating statusOpen, no restriction
ScourBridge not over waterway
Structural evaluation7: Better than present minimum criteria
Deck geometry9: Superior to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating82 US tons
Inventory rating49.1 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialSteel Continuous
DeckConcrete, cast-in-place
Main spans3
Design loadHS 25 or greater
Structure length428 ft (130.5 m)
Longest span190 ft (58 m)
Deck width138 ft (42.1 m)
Roadway width133 ft (40.5 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic76,500 (2023)
Projected traffic114,750 by 2042
Trucks5%
Lanes on structure8
Traffic directionTwo-way traffic
CarriesOverpass structure at an interchange
CrossesHighway and railroad
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—
NavigationNot applicable (no waterway)

Frequently asked questions

When was I 184B Ebl & Wbl over S7403;UPRR;FRANKLIN Ic built?

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

What condition is I 184B Ebl & Wbl over S7403;UPRR;FRANKLIN Ic 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 June 2023.

How much traffic does I 184B Ebl & Wbl over S7403;UPRR;FRANKLIN Ic carry?

About 76,500 vehicles per day (2023 count), of which roughly 5% are trucks.

How long is I 184B Ebl & Wbl over S7403;UPRR;FRANKLIN Ic?

The structure is 428 ft (130.5 m) long with a longest span of 190 ft (58 m) and a deck 138 ft wide.

Who owns I 184B Ebl & Wbl over S7403;UPRR;FRANKLIN Ic?

It is owned by the State Highway Agency.