US Bridges

I 84 Wbl over Canyon Cr;glenns Ferry

Fair

Elmore County, Idaho · At Glenns Ferry Ncl · Structure no. 000000000015955

Built
1976
49 years old
Condition
Fair
inspected August 2021
Type
Stringer/Multi-beam or Girder
Prestressed Concrete
Length
74 ft
1 main span
Daily traffic
9,750
2023 count
Owner
State
State Highway Agency

About this bridge

I 84 Wbl over Canyon Cr;glenns Ferry is a prestressed concrete stringer/multi-beam or girder carrying I 84 Wbl over Canyon Cr;glenns Ferry in Elmore County, Idaho. It was built in 1976, so it is 49 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 9,750 vehicles a day, roughly 30% of them trucks, projected to reach 14,625 by 2042. The structure is 74 ft (22.6 m) long and 44 ft wide. If it were closed, the detour would be 1.2 mi (2 km).

Location

Open in Google Maps
CarriesI 84 Wbl
CrossesCanyon Cr;glenns Ferry
LocationAt Glenns Ferry Ncl
RouteInterstate 84
CountyElmore County
StateIdaho
Coordinates42.9608, -115.30417
Functional classRural 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
Deck7 GoodSome minor problems.
Superstructure7 GoodSome minor problems.
Substructure6 SatisfactoryStructural elements show some minor deterioration.
Channel and channel protection8 Very GoodNo problems noted.
Last inspectionAugust 2021
Inspection intervalevery 48 months
Operating statusOpen, no restriction
ScourFoundations on dry land well above flood water elevations
Structural evaluation6: Equal to present minimum criteria
Deck geometry7: Better than present minimum criteria
Waterway adequacy8: Equal to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating73 US tons
Inventory rating39 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialPrestressed Concrete
DeckConcrete, cast-in-place
Main spans1
Design loadHS 20
Structure length74 ft (22.6 m)
Longest span71 ft (21.6 m)
Deck width44 ft (13.3 m)
Roadway width41 ft (12.4 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic9,750 (2023)
Projected traffic14,625 by 2042
Trucks30%
Lanes on structure2
Traffic directionOne-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 Wbl over Canyon Cr;glenns Ferry built?

It was built in 1976, making it 49 years old in 2025.

What condition is I 84 Wbl over Canyon Cr;glenns Ferry 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 August 2021.

How much traffic does I 84 Wbl over Canyon Cr;glenns Ferry carry?

About 9,750 vehicles per day (2023 count), of which roughly 30% are trucks.

How long is I 84 Wbl over Canyon Cr;glenns Ferry?

The structure is 74 ft (22.6 m) long with a longest span of 71 ft (21.6 m) and a deck 44 ft wide.

Who owns I 84 Wbl over Canyon Cr;glenns Ferry?

It is owned by the State Highway Agency.