US Bridges

US 89 over ST Charles Creek

Good

Bear Lake County, Idaho · In ST Charles · Structure no. 000000000016676

Built
2013
12 years old
Condition
Good
inspected September 2022
Type
Stringer/Multi-beam or Girder
Prestressed Concrete
Length
87 ft
1 main span
Daily traffic
1,800
2023 count
Owner
State
State Highway Agency

About this bridge

US 89 over ST Charles Creek is a prestressed concrete stringer/multi-beam or girder carrying US 89 over ST Charles Creek in Bear Lake County, Idaho. It was built in 2013, so it is 12 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 8 out of 9. All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted.

It carries about 1,800 vehicles a day, roughly 12% of them trucks, projected to reach 2,700 by 2042. The structure is 87 ft (26.5 m) long and 60 ft wide. If it were closed, the detour would be 0.6 mi (1 km).

CarriesUS 89
CrossesST Charles Creek
LocationIn ST Charles
RouteU.S. Route 89
StateIdaho
Coordinates42.12356, -111.39081
Functional classRural Principal Arterial - Other

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.
Superstructure8 Very GoodNo problems noted.
Substructure8 Very GoodNo problems noted.
Channel and channel protection8 Very GoodNo problems noted.
Last inspectionSeptember 2022
Inspection intervalevery 48 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation8: Equal to present desirable criteria
Deck geometry9: Superior to present desirable criteria
Waterway adequacy9: Superior to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating54.2 US tons
Inventory rating41.8 US tons

Structure

MaterialPrestressed Concrete
DeckConcrete, cast-in-place
Main spans1
Design loadHL 93
Structure length87 ft (26.5 m)
Longest span85 ft (25.9 m)
Deck width60 ft (18.4 m)
Roadway width58 ft (17.6 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic1,800 (2023)
Projected traffic2,700 by 2042
Trucks12%
Lanes on structure3
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed0.6 mi (1 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 89 over ST Charles Creek built?

It was built in 2013, making it 12 years old in 2025.

What condition is US 89 over ST Charles Creek 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 September 2022.

How much traffic does US 89 over ST Charles Creek carry?

About 1,800 vehicles per day (2023 count), of which roughly 12% are trucks.

How long is US 89 over ST Charles Creek?

The structure is 87 ft (26.5 m) long with a longest span of 85 ft (25.9 m) and a deck 60 ft wide.

Who owns US 89 over ST Charles Creek?

It is owned by the State Highway Agency.