US Bridges

Osgood Road over I 15 Nb-Sb;osgood Rd.Gs

Fair

Bonneville County, Idaho · 3.4 N. 1.4 W. Idaho Falls · Structure no. 000000000031385

Built
1962
63 years old
Condition
Fair
inspected May 2021
Type
Stringer/Multi-beam or Girder
Prestressed Concrete
Length
233 ft
3 main spans
Daily traffic
300
2023 count
Owner
State
State Highway Agency

About this bridge

Osgood Road over I 15 Nb-Sb;osgood Rd.Gs is a prestressed concrete stringer/multi-beam or girder carrying Osgood Road over I 15 Nb-Sb;osgood Rd.Gs in Bonneville County, Idaho. It was built in 1962, so it is 63 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 300 vehicles a day, roughly 11% of them trucks, projected to reach 450 by 2042. The structure is 233 ft (71 m) long and 29 ft wide. If it were closed, the detour would be 3.7 mi (6 km).

Location

Open in Google Maps
CarriesOsgood Road
CrossesI 15 Nb-Sb;osgood Rd.Gs
Location3.4 N. 1.4 W. Idaho Falls
RouteCounty Highway 0
CountyBonneville County
StateIdaho
Coordinates43.53899, -112.06909
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.
Superstructure7 GoodSome minor problems.
Substructure6 SatisfactoryStructural elements show some minor deterioration.
Last inspectionMay 2021
Inspection intervalevery 48 months
Operating statusOpen, no restriction
ScourBridge not over waterway
Structural evaluation6: Equal to present minimum criteria
Deck geometry5: Somewhat better than minimum adequacy to tolerate being left in place as is
Approach roadway alignment7: Better than present minimum criteria
Operating rating65 US tons
Inventory rating39 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialPrestressed Concrete
DeckConcrete, cast-in-place
Main spans3 (+2 approach)
Design loadHS 20
Structure length233 ft (71 m)
Longest span51 ft (15.5 m)
Deck width29 ft (8.7 m)
Roadway width24 ft (7.3 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic300 (2023)
Projected traffic450 by 2042
Trucks11%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesHighway
Detour if closed3.7 mi (6 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$2.3 million (2021 estimate)
NavigationNot applicable (no waterway)

Frequently asked questions

When was Osgood Road over I 15 Nb-Sb;osgood Rd.Gs built?

It was built in 1962, making it 63 years old in 2025.

What condition is Osgood Road over I 15 Nb-Sb;osgood Rd.Gs 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 2021.

How much traffic does Osgood Road over I 15 Nb-Sb;osgood Rd.Gs carry?

About 300 vehicles per day (2023 count), of which roughly 11% are trucks.

How long is Osgood Road over I 15 Nb-Sb;osgood Rd.Gs?

The structure is 233 ft (71 m) long with a longest span of 51 ft (15.5 m) and a deck 29 ft wide.

Who owns Osgood Road over I 15 Nb-Sb;osgood Rd.Gs?

It is owned by the State Highway Agency.