US Bridges

E 800 N Road over I 15 Nb-Sb; E 800 N

Fair

Jefferson County, Idaho · 1.8 N. Roberts · Structure no. 000000000032625

Built
1968
57 years old
Condition
Fair
inspected April 2024
Type
Stringer/Multi-beam or Girder
Prestressed Concrete
Length
223 ft
5 main spans
Daily traffic
310
2023 count
Owner
State
State Highway Agency

About this bridge

E 800 N Road over I 15 Nb-Sb; E 800 N is a prestressed concrete stringer/multi-beam or girder carrying E 800 N Road over I 15 Nb-Sb; E 800 N in Jefferson County, Idaho. It was built in 1968, so it is 57 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 310 vehicles a day, roughly 10% of them trucks, projected to reach 465 by 2042. The structure is 223 ft (68 m) long and 29 ft wide. If it were closed, the detour would be 6.2 mi (10 km).

Location

Open in Google Maps
CarriesE 800 N Road
CrossesI 15 Nb-Sb; E 800 N
Location1.8 N. Roberts
RouteCounty Highway 0
CountyJefferson County
StateIdaho
Coordinates43.74178, -112.14769
Functional classRural Local

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.
Last inspectionApril 2024
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 geometry5: Somewhat better than minimum adequacy to tolerate being left in place as is
Approach roadway alignment6: Equal to present minimum criteria
Operating rating53 US tons
Inventory rating32 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialPrestressed Concrete
DeckConcrete, cast-in-place
Main spans5
Design loadHS 20
Structure length223 ft (68 m)
Longest span49 ft (14.9 m)
Deck width29 ft (8.9 m)
Roadway width26 ft (7.9 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic310 (2023)
Projected traffic465 by 2042
Trucks10%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesHighway
Detour if closed6.2 mi (10 km)
TollOn a free road
National Highway SystemNo

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$1.9 million (2018 estimate)
NavigationNot applicable (no waterway)

Frequently asked questions

When was E 800 N Road over I 15 Nb-Sb; E 800 N built?

It was built in 1968, making it 57 years old in 2025.

What condition is E 800 N Road over I 15 Nb-Sb; E 800 N 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 April 2024.

How much traffic does E 800 N Road over I 15 Nb-Sb; E 800 N carry?

About 310 vehicles per day (2023 count), of which roughly 10% are trucks.

How long is E 800 N Road over I 15 Nb-Sb; E 800 N?

The structure is 223 ft (68 m) long with a longest span of 49 ft (14.9 m) and a deck 29 ft wide.

Who owns E 800 N Road over I 15 Nb-Sb; E 800 N?

It is owned by the State Highway Agency.