US Bridges

SH 36 over Bear River

Good

Franklin County, Idaho · 1.0 W. Preston · Structure no. 000000000014101

Built
2018
7 years old
Condition
Good
inspected July 2022
Type
Stringer/Multi-beam or Girder
Prestressed Concrete
Length
274 ft
2 main spans
Daily traffic
3,000
2023 count
Owner
State
State Highway Agency

About this bridge

SH 36 over Bear River is a prestressed concrete stringer/multi-beam or girder carrying SH 36 over Bear River in Franklin County, Idaho. It was built in 2018, so it is 7 years old, younger than the Idaho average of 45.3 years.

The most recent inspection reported to the Federal Highway Administration rates it in good condition with a lowest component rating of 7 out of 9. All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted.

It carries about 3,000 vehicles a day, roughly 4% of them trucks, projected to reach 4,500 by 2042. The structure is 274 ft (83.5 m) long and 40 ft wide. If it were closed, the detour would be 14.9 mi (24 km).

Location

Open in Google Maps
CarriesSH 36
CrossesBear River
Location1.0 W. Preston
RouteState Highway 36
CountyFranklin County
StateIdaho
Coordinates42.097, -111.91672
Functional classRural Major Collector

Condition and inspection

Good

All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted.

ComponentRatingMeaning
Deck8 Very GoodNo problems noted.
Superstructure7 GoodSome minor problems.
Substructure7 GoodSome minor problems.
Channel and channel protection8 Very GoodNo problems noted.
Last inspectionJuly 2022
Inspection intervalevery 48 months
Operating statusOpen, no restriction
ScourFoundations stable; scour within limits of footing or piles
Structural evaluation7: Better than present minimum criteria
Deck geometry5: Somewhat better than minimum adequacy to tolerate being left in place as is
Waterway adequacy9: Superior to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating58.5 US tons
Inventory rating44.6 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialPrestressed Concrete
DeckConcrete, cast-in-place
Main spans2
Design loadHL 93
Structure length274 ft (83.5 m)
Longest span137 ft (41.8 m)
Deck width40 ft (12.2 m)
Roadway width37 ft (11.4 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic3,000 (2023)
Projected traffic4,500 by 2042
Trucks4%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed14.9 mi (24 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 proposedNone recorded
Estimated improvement cost—
NavigationNo navigation control on waterway

Frequently asked questions

When was SH 36 over Bear River built?

It was built in 2018, making it 7 years old in 2025.

What condition is SH 36 over Bear River in?

The National Bridge Inventory rates it in good condition. All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted. The last reported inspection was in July 2022.

How much traffic does SH 36 over Bear River carry?

About 3,000 vehicles per day (2023 count), of which roughly 4% are trucks.

How long is SH 36 over Bear River?

The structure is 274 ft (83.5 m) long with a longest span of 137 ft (41.8 m) and a deck 40 ft wide.

Who owns SH 36 over Bear River?

It is owned by the State Highway Agency.