US Bridges

STP8393;FRANKLIN B over I 84;FRANKLIN Blvd Ic

Fair

Canyon County, Idaho · In Nampa · Structure no. 000000000021882

Built
2000
25 years old, rebuilt 2009
Condition
Fair
inspected January 2022
Type
Stringer/Multi-beam or Girder
Prestressed Concrete Continuous
Length
225 ft
4 main spans
Daily traffic
24,500
2023 count
Owner
State
State Highway Agency

About this bridge

STP8393;FRANKLIN B over I 84;FRANKLIN Blvd Ic is a prestressed concrete continuous stringer/multi-beam or girder carrying STP8393;FRANKLIN B over I 84;FRANKLIN Blvd Ic in Canyon County, Idaho. It was built in 2000 and reconstructed in 2009, so it is 25 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 24,500 vehicles a day, roughly 7% of them trucks, projected to reach 36,750 by 2042. The structure is 225 ft (68.6 m) long and 111 ft wide. If it were closed, the detour would be 1.9 mi (3 km).

Location

Open in Google Maps
CarriesSTP8393;FRANKLIN B
CrossesI 84;FRANKLIN Blvd Ic
LocationIn Nampa
RouteCity Street 8393
CountyCanyon County
StateIdaho
Coordinates43.59858, -116.55314
Functional classUrban Other Principal Arterial

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.
Last inspectionJanuary 2022
Inspection intervalevery 48 months
Operating statusOpen, no restriction
ScourBridge not over waterway
Structural evaluation6: Equal to present minimum criteria
Deck geometry9: Superior to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating75 US tons
Inventory rating45 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialPrestressed Concrete Continuous
DeckConcrete, cast-in-place
Main spans4
Design loadHS 25 or greater
Structure length225 ft (68.6 m)
Longest span77 ft (23.5 m)
Deck width111 ft (33.7 m)
Roadway width98 ft (29.9 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic24,500 (2023)
Projected traffic36,750 by 2042
Trucks7%
Lanes on structure5
Traffic directionTwo-way traffic
CarriesOverpass structure at an interchange
CrossesHighway
Detour if closed1.9 mi (3 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 STP8393;FRANKLIN B over I 84;FRANKLIN Blvd Ic built?

It was built in 2000, making it 25 years old in 2025. It was reconstructed in 2009.

What condition is STP8393;FRANKLIN B over I 84;FRANKLIN Blvd Ic 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 January 2022.

How much traffic does STP8393;FRANKLIN B over I 84;FRANKLIN Blvd Ic carry?

About 24,500 vehicles per day (2023 count), of which roughly 7% are trucks.

How long is STP8393;FRANKLIN B over I 84;FRANKLIN Blvd Ic?

The structure is 225 ft (68.6 m) long with a longest span of 77 ft (23.5 m) and a deck 111 ft wide.

Who owns STP8393;FRANKLIN B over I 84;FRANKLIN Blvd Ic?

It is owned by the State Highway Agency.