US Bridges

SH 57 over Kalispell Creek

Good

Bonner County, Idaho · 3.2 S. Nordman · Structure no. 000000000014901

Built
2020
5 years old
Condition
Good
inspected August 2023
Type
Box Beam or Girders - Multiple
Prestressed Concrete
Length
46 ft
1 main span
Daily traffic
880
2023 count
Owner
State
State Highway Agency

About this bridge

SH 57 over Kalispell Creek is a prestressed concrete box beam or girders - multiple carrying SH 57 over Kalispell Creek in Bonner County, Idaho. It was built in 2020, so it is 5 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 880 vehicles a day, roughly 13% of them trucks, projected to reach 1,320 by 2042. The structure is 46 ft (14 m) long and 44 ft wide. If it were closed, the detour would be 98.8 mi (159 km).

CarriesSH 57
CrossesKalispell Creek
Location3.2 S. Nordman
RouteState Highway 57
StateIdaho
Coordinates48.60083, -116.96875
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.
Superstructure8 Very GoodNo problems noted.
Substructure8 Very GoodNo problems noted.
Channel and channel protection9 ExcellentNo problems noted.
Last inspectionAugust 2023
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 rating59 US tons
Inventory rating45.3 US tons

Structure

MaterialPrestressed Concrete
DeckConcrete, precast panels
Main spans1
Design loadHL 93
Structure length46 ft (14 m)
Longest span43 ft (13.1 m)
Deck width44 ft (13.4 m)
Roadway width41 ft (12.6 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic880 (2023)
Projected traffic1,320 by 2042
Trucks13%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed98.8 mi (159 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 57 over Kalispell Creek built?

It was built in 2020, making it 5 years old in 2025.

What condition is SH 57 over Kalispell 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 August 2023.

How much traffic does SH 57 over Kalispell Creek carry?

About 880 vehicles per day (2023 count), of which roughly 13% are trucks.

How long is SH 57 over Kalispell Creek?

The structure is 46 ft (14 m) long with a longest span of 43 ft (13.1 m) and a deck 44 ft wide.

Who owns SH 57 over Kalispell Creek?

It is owned by the State Highway Agency.