Structure 100521000010761 · Petersburg County, AK

Logging Road over Stream

Carries Logging Road over Stream, Kupreanof Island At Kake.

Overall conditionPoor

Set by its lowest-rated component: Superstructure at 2 of 9.

How ratings work
Superstructuresets the rating2/9 · Critical
Substructure6/9 · Satisfactory
Channelnot part of overall8/9 · Very Good
0 failed4 poor6 fair9 excellent

Elevation

Side view, colored by inspection rating
CAR · 15 FT50 FT OVERALL25 FT0ELEVATION · LENGTHS TO SCALE
Deck not ratedSuperstructure 2/9 · sets the ratingSubstructure 6/9

50 ft end to end. Lengths and the car 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.

Built200323 years old
Length49.5 ft15.1 m
Daily traffic10counted 2006
Last inspectedAugust 2023every 12 months

Location

StateAlaska
CountyPetersburg
LocationKupreanof Island At Kake
CarriesLogging Road
CrossesStream
Coordinates56.62600, -133.46000

Physical Characteristics

MaterialWood or Timber
DesignStringer/Multi-beam
Total Length49.5 ft (15.1 m)
Max Span46.6 ft (14.2 m)
Deck Width21.0 ft (6.4 m)
Deck Area96.6 sq m
Main Spans1
Year Built2003

Traffic

Avg Daily Traffic10 (2006)
Lanes On Bridge1

Inspection & Ownership

Last InspectionAugust 2023
Inspection FrequencyEvery 12 months
OwnerU.S. Forest Service
Historical SignificanceHistorical significance is not determined
Scour Critical5 — Stable for scour
Structure Number100521000010761

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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