US Bridges

STC5745;E.FERNAN L over Fernan Lake

Good

Kootenai County, Idaho · 3 E. 0.3 N. Cda · Structure no. 000000000020448

Built
2010
15 years old
Condition
Good
inspected June 2021
Type
Stringer/Multi-beam or Girder
Prestressed Concrete
Length
444 ft
7 main spans
Daily traffic
820
2023 count
Owner
Local
Other Local Agency

About this bridge

STC5745;E.FERNAN L over Fernan Lake is a prestressed concrete stringer/multi-beam or girder carrying STC5745;E.FERNAN L over Fernan Lake in Kootenai County, Idaho. It was built in 2010, so it is 15 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 820 vehicles a day, roughly 12% of them trucks, projected to reach 1,230 by 2042. The structure is 444 ft (135.3 m) long and 35 ft wide. If it were closed, the detour would be 29.8 mi (48 km).

Location

Open in Google Maps
CarriesSTC5745;E.FERNAN L
CrossesFernan Lake
Location3 E. 0.3 N. Cda
RouteCounty Highway 5745
CountyKootenai County
StateIdaho
Coordinates47.68003, -116.71117
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
Deck7 GoodSome minor problems.
Superstructure8 Very GoodNo problems noted.
Substructure7 GoodSome minor problems.
Channel and channel protection8 Very GoodNo problems noted.
Last inspectionJune 2021
Inspection intervalevery 48 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation5: Somewhat better than minimum adequacy to tolerate being left in place as is
Deck geometry6: Equal to present minimum criteria
Waterway adequacy8: Equal to present desirable criteria
Approach roadway alignment6: Equal to present minimum criteria
Operating rating44.3 US tons
Inventory rating23.9 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialPrestressed Concrete
DeckConcrete, cast-in-place
Main spans7
Design loadHL 93
Structure length444 ft (135.3 m)
Longest span63 ft (19.2 m)
Deck width35 ft (10.7 m)
Roadway width32 ft (9.8 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic820 (2023)
Projected traffic1,230 by 2042
Trucks12%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed29.8 mi (48 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—
NavigationNo navigation control on waterway

Frequently asked questions

When was STC5745;E.FERNAN L over Fernan Lake built?

It was built in 2010, making it 15 years old in 2025.

What condition is STC5745;E.FERNAN L over Fernan Lake 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 June 2021.

How much traffic does STC5745;E.FERNAN L over Fernan Lake carry?

About 820 vehicles per day (2023 count), of which roughly 12% are trucks.

How long is STC5745;E.FERNAN L over Fernan Lake?

The structure is 444 ft (135.3 m) long with a longest span of 63 ft (19.2 m) and a deck 35 ft wide.

Who owns STC5745;E.FERNAN L over Fernan Lake?

It is owned by the Other Local Agency.