US Bridges

US 20 over Sma 7096;RIVERSIDE Dr.Ic

Fair

Bonneville County, Idaho · In Idaho Falls;riverside · Structure no. 000000000012340

Built
1969
56 years old, rebuilt 1989
Condition
Fair
inspected May 2023
Type
Stringer/Multi-beam or Girder
Steel Continuous
Length
160 ft
2 main spans
Daily traffic
38,000
2023 count
Owner
State
State Highway Agency

About this bridge

US 20 over Sma 7096;RIVERSIDE Dr.Ic is a steel continuous stringer/multi-beam or girder carrying US 20 over Sma 7096;RIVERSIDE Dr.Ic in Bonneville County, Idaho. It was built in 1969 and reconstructed in 1989, so it is 56 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 38,000 vehicles a day, roughly 18% of them trucks, projected to reach 57,000 by 2042. The structure is 160 ft (48.8 m) long and 79 ft wide.

Location

Open in Google Maps
CarriesUS 20
CrossesSma 7096;RIVERSIDE Dr.Ic
LocationIn Idaho Falls;riverside
RouteU.S. Route 20
CountyBonneville County
StateIdaho
Coordinates43.5085, -112.04717
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.
Superstructure5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Substructure6 SatisfactoryStructural elements show some minor deterioration.
Last inspectionMay 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourBridge not over waterway
Structural evaluation5: Somewhat better than minimum adequacy to tolerate being left in place as is
Deck geometry9: Superior to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating61.9 US tons
Inventory rating37 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialSteel Continuous
DeckConcrete, cast-in-place
Main spans2
Design loadHS 20
Structure length160 ft (48.8 m)
Longest span94 ft (28.7 m)
Deck width79 ft (24.2 m)
Roadway width76 ft (23.3 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic38,000 (2023)
Projected traffic57,000 by 2042
Trucks18%
Lanes on structure4
Traffic directionTwo-way traffic
CarriesOverpass structure at an interchange
CrossesHighway
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 proposedReplacement because of substandard load-carrying capacity or roadway geometry
Estimated improvement cost$2.3 million (2017 estimate)
NavigationNot applicable (no waterway)

Frequently asked questions

When was US 20 over Sma 7096;RIVERSIDE Dr.Ic built?

It was built in 1969, making it 56 years old in 2025. It was reconstructed in 1989.

What condition is US 20 over Sma 7096;RIVERSIDE Dr.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 May 2023.

How much traffic does US 20 over Sma 7096;RIVERSIDE Dr.Ic carry?

About 38,000 vehicles per day (2023 count), of which roughly 18% are trucks.

How long is US 20 over Sma 7096;RIVERSIDE Dr.Ic?

The structure is 160 ft (48.8 m) long with a longest span of 94 ft (28.7 m) and a deck 79 ft wide.

Who owns US 20 over Sma 7096;RIVERSIDE Dr.Ic?

It is owned by the State Highway Agency.