Structure 20448 · Kootenai County, ID

Stc5745;e.fernan L over Fernan Lake

Carries Stc5745;e.fernan L over Fernan Lake, 3 E. 0.3 N. Cda.

Overall conditionGood

Set by its lowest-rated component: Deck and Substructure at 7 of 9.

How ratings work
Decksets the rating7/9 · Good
Superstructure8/9 · Very Good
Substructuresets the rating7/9 · Good
Channelnot part of overall8/9 · Very Good
0 failed4 poor6 fair9 excellent

Elevation

Side view, colored by inspection rating
SEMI-TRUCK · 72 FT444 FT OVERALL50 FT0ELEVATION · LENGTHS TO SCALE
Deck 7/9 · sets the ratingSuperstructure 8/9Substructure 7/9 · sets the rating

444 ft end to end, longest span 63 ft: about 6 semi-trucks nose to tail. Lengths and the semi-truck on the deck are drawn to the same scale. Each part is colored by its latest inspection rating. The inventory records lengths but not heights or the layout of the shorter spans, so those are drawn as typical for a multi-beam bridge.

Built201016 years old
Length443.9 ft135.3 m
Daily traffic820counted 2023
Last inspectedJune 2021every 48 months

Location

StateIdaho
CountyKootenai
Location3 E. 0.3 N. Cda
CarriesStc5745;e.fernan L
CrossesFernan Lake
Coordinates47.68003, -116.71117

Physical Characteristics

MaterialPrestressed Concrete
DesignStringer/Multi-beam
Total Length443.9 ft (135.3 m)
Max Span63.0 ft (19.2 m)
Deck Width35.1 ft (10.7 m)
Deck Area1447.7 sq m
Main Spans7
Year Built2010

Traffic

Avg Daily Traffic820 (2023)
Truck Traffic12%
Lanes On Bridge2

Inspection & Ownership

Last InspectionJune 2021
Inspection FrequencyEvery 48 months
OwnerOther Local Agencies
Historical SignificanceHistorical significance is not determined
Scour Critical8 — Stable, low risk
Structure Number000000000020448

How Bridge Ratings Work

Inspectors rate each major part of a bridge (the deck you drive on, the superstructure of beams that holds it up, and the substructure of piers and abutments beneath) on a 0–9 scale. A bridge's overall condition is its lowest of those ratings, so one deteriorated component makes the whole bridge "poor."

0Failed
1Imminent failure
2Critical
3Serious
4Poor
5Fair
6Satisfactory
7Good
8Very good
9Excellent
Good · lowest component 7–9
Fair · lowest component 5–6
Poor · lowest component 0–4

A poor rating is not a closure. It means the bridge is flagged for priority repair or replacement; bridges judged unsafe are closed or posted with weight limits. The waterway (channel) rating is reported, but it does not count toward the overall classification.

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