US Bridges

US 20 Ebl over Ririe Outlet Channel

Fair

Bonneville County, Idaho · 5.4 N. Idaho Falls · Structure no. 000000000012390

Built
1974
51 years old
Condition
Fair
inspected August 2023
Type
Slab
Concrete
Length
58 ft
1 main span
Daily traffic
17,750
2023 count
Owner
State
State Highway Agency

About this bridge

US 20 Ebl over Ririe Outlet Channel is a concrete slab carrying US 20 Ebl over Ririe Outlet Channel in Bonneville County, Idaho. It was built in 1974, so it is 51 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 5 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 17,750 vehicles a day, roughly 7% of them trucks, projected to reach 26,625 by 2042. The structure is 58 ft (17.7 m) long and 44 ft wide.

Location

Open in Google Maps
CarriesUS 20 Ebl
CrossesRirie Outlet Channel
Location5.4 N. Idaho Falls
RouteU.S. Route 20
CountyBonneville County
StateIdaho
Coordinates43.57558, -111.97911
Functional classRural Principal Arterial - Other

Condition and inspection

Fair

The lowest-rated primary component is rated 5 or 6. Minor deterioration is present but the structure is sound.

ComponentRatingMeaning
Deck5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Superstructure5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Substructure7 GoodSome minor problems.
Channel and channel protection8 Very GoodNo problems noted.
Last inspectionAugust 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation5: Somewhat better than minimum adequacy to tolerate being left in place as is
Deck geometry7: Better than present minimum criteria
Waterway adequacy9: Superior to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating80 US tons
Inventory rating48 US tons

Structure

Structure typeSlab
MaterialConcrete
DeckConcrete, cast-in-place
Main spans1
Design loadHS 20
Structure length58 ft (17.7 m)
Longest span58 ft (17.7 m)
Deck width44 ft (13.3 m)
Roadway width41 ft (12.4 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic17,750 (2023)
Projected traffic26,625 by 2042
Trucks7%
Lanes on structure2
Traffic directionOne-way traffic
CarriesHighway
CrossesWaterway
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—
NavigationNo navigation control on waterway

Frequently asked questions

When was US 20 Ebl over Ririe Outlet Channel built?

It was built in 1974, making it 51 years old in 2025.

What condition is US 20 Ebl over Ririe Outlet Channel 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 2023.

How much traffic does US 20 Ebl over Ririe Outlet Channel carry?

About 17,750 vehicles per day (2023 count), of which roughly 7% are trucks.

How long is US 20 Ebl over Ririe Outlet Channel?

The structure is 58 ft (17.7 m) long with a longest span of 58 ft (17.7 m) and a deck 44 ft wide.

Who owns US 20 Ebl over Ririe Outlet Channel?

It is owned by the State Highway Agency.