US Bridges

I 84 Off Ramp over Drainage Run Off

Good

Canyon County, Idaho · In Nampa · Structure no. 000000000014723

Built
2006
19 years old
Condition
Good
inspected February 2021
Type
Stringer/Multi-beam or Girder
Prestressed Concrete Continuous
Length
133 ft
2 main spans
Daily traffic
7,500
2023 count
Owner
State
State Highway Agency

About this bridge

I 84 Off Ramp over Drainage Run Off is a prestressed concrete continuous stringer/multi-beam or girder carrying I 84 Off Ramp over Drainage Run Off in Canyon County, Idaho. It was built in 2006, so it is 19 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 7,500 vehicles a day, projected to reach 11,250 by 2042. The structure is 133 ft (40.5 m) long and 31 ft wide.

Location

Open in Google Maps
CarriesI 84 Off Ramp
CrossesDrainage Run Off
LocationIn Nampa
RouteInterstate 84
CountyCanyon County
StateIdaho
Coordinates43.6094, -116.59817
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 inspectionFebruary 2021
Inspection intervalevery 48 months
Operating statusOpen, no restriction
ScourBridge not over waterway
Structural evaluation8: Equal to present desirable criteria
Deck geometry9: Superior to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating110.1 US tons
Inventory rating65 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialPrestressed Concrete Continuous
DeckConcrete, cast-in-place
Main spans2
Design loadHL 93
Structure length133 ft (40.5 m)
Longest span66 ft (20.1 m)
Deck width31 ft (9.6 m)
Roadway width29 ft (8.8 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic7,500 (2023)
Projected traffic11,250 by 2042
Trucks0%
Lanes on structure1
Traffic directionOne-way traffic
CarriesHighway
CrossesOther
Detour if closed—
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 84 Off Ramp over Drainage Run Off built?

It was built in 2006, making it 19 years old in 2025.

What condition is I 84 Off Ramp over Drainage Run Off 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 February 2021.

How much traffic does I 84 Off Ramp over Drainage Run Off carry?

About 7,500 vehicles per day (2023 count).

How long is I 84 Off Ramp over Drainage Run Off?

The structure is 133 ft (40.5 m) long with a longest span of 66 ft (20.1 m) and a deck 31 ft wide.

Who owns I 84 Off Ramp over Drainage Run Off?

It is owned by the State Highway Agency.