US Bridges

Northwest Passage over Ski Trail

Good

Bonner County, Idaho · 6.0 N. 3.5 W. Sandpoint · Structure no. 000000000033576

Built
2023
2 years old
Condition
Good
inspected October 2023
Type
Stringer/Multi-beam or Girder
Steel
Length
42 ft
1 main span
Daily traffic
100
2023 count
Owner
Local
Other Local Agency

About this bridge

Northwest Passage over Ski Trail is a steel stringer/multi-beam or girder carrying Northwest Passage over Ski Trail in Bonner County, Idaho. It was built in 2023, so it is 2 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 9 out of 9. All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted.

It carries about 100 vehicles a day, roughly 5% of them trucks, projected to reach 150 by 2042. The structure is 42 ft (12.9 m) long and 30 ft wide. If it were closed, the detour would be 1.2 mi (2 km).

Location

Open in Google Maps
CarriesNorthwest Passage
CrossesSki Trail
Location6.0 N. 3.5 W. Sandpoint
RouteCounty Highway 0
CountyBonner County
StateIdaho
Coordinates48.3657, -116.6217
Functional classRural Local

Condition and inspection

Good

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

ComponentRatingMeaning
Deck9 ExcellentNo problems noted.
Superstructure9 ExcellentNo problems noted.
Substructure9 ExcellentNo problems noted.
Last inspectionOctober 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourBridge not over waterway
Structural evaluation9: Superior to present desirable criteria
Deck geometry7: Better than present minimum criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating57.9 US tons
Inventory rating44.6 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialSteel
DeckCorrugated steel
Main spans1
Design loadHL 93
Structure length42 ft (12.9 m)
Longest span41 ft (12.6 m)
Deck width30 ft (9.1 m)
Roadway width30 ft (9.1 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic100 (2023)
Projected traffic150 by 2042
Trucks5%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesPedestrian / bicycle
Detour if closed1.2 mi (2 km)
TollOn a free road
National Highway SystemNo

Ownership and planned work

OwnerOther Local Agency
Maintained byOther Local Agency
Historic statusHistorical significance not determinable at this time
Work proposedNone recorded
Estimated improvement cost—
NavigationNot applicable (no waterway)

Frequently asked questions

When was Northwest Passage over Ski Trail built?

It was built in 2023, making it 2 years old in 2025.

What condition is Northwest Passage over Ski Trail 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 October 2023.

How much traffic does Northwest Passage over Ski Trail carry?

About 100 vehicles per day (2023 count), of which roughly 5% are trucks.

How long is Northwest Passage over Ski Trail?

The structure is 42 ft (12.9 m) long with a longest span of 41 ft (12.6 m) and a deck 30 ft wide.

Who owns Northwest Passage over Ski Trail?

It is owned by the Other Local Agency.