US Bridges

US 20 Ebl over Snake River;lorenzo Br.

Fair

Jefferson County, Idaho · 0.3 N. Lorenzo · Structure no. 000000000012495

Built
1980
45 years old
Condition
Fair
inspected September 2023
Type
Stringer/Multi-beam or Girder
Prestressed Concrete
Length
639 ft
6 main spans
Daily traffic
15,250
2023 count
Owner
State
State Highway Agency

About this bridge

US 20 Ebl over Snake River;lorenzo Br. is a prestressed concrete stringer/multi-beam or girder carrying US 20 Ebl over Snake River;lorenzo Br. in Jefferson County, Idaho. It was built in 1980, so it is 45 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 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 15,250 vehicles a day, roughly 7% of them trucks, projected to reach 22,875 by 2042. The structure is 639 ft (194.8 m) long and 45 ft wide. If it were closed, the detour would be 1.2 mi (2 km).

Location

Open in Google Maps
CarriesUS 20 Ebl
CrossesSnake River;lorenzo Br.
Location0.3 N. Lorenzo
RouteU.S. Route 20
CountyJefferson County
StateIdaho
Coordinates43.73078, -111.86886
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
Deck7 GoodSome minor problems.
Superstructure5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Substructure6 SatisfactoryStructural elements show some minor deterioration.
Channel and channel protection5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Last inspectionSeptember 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour within limits of footing or piles
Structural evaluation5: Somewhat better than minimum adequacy to tolerate being left in place as is
Deck geometry8: Equal to present desirable criteria
Waterway adequacy9: Superior to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating57 US tons
Inventory rating35.1 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialPrestressed Concrete
DeckConcrete, cast-in-place
Main spans6
Design loadHS 20
Structure length639 ft (194.8 m)
Longest span107 ft (32.6 m)
Deck width45 ft (13.6 m)
Roadway width42 ft (12.8 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic15,250 (2023)
Projected traffic22,875 by 2042
Trucks7%
Lanes on structure2
Traffic directionOne-way traffic
CarriesHighway
CrossesWaterway
Detour if closed1.2 mi (2 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—
NavigationNo navigation control on waterway

Frequently asked questions

When was US 20 Ebl over Snake River;lorenzo Br. built?

It was built in 1980, making it 45 years old in 2025.

What condition is US 20 Ebl over Snake River;lorenzo Br. 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 September 2023.

How much traffic does US 20 Ebl over Snake River;lorenzo Br. carry?

About 15,250 vehicles per day (2023 count), of which roughly 7% are trucks.

How long is US 20 Ebl over Snake River;lorenzo Br.?

The structure is 639 ft (194.8 m) long with a longest span of 107 ft (32.6 m) and a deck 45 ft wide.

Who owns US 20 Ebl over Snake River;lorenzo Br.?

It is owned by the State Highway Agency.