Structure 1425 · Kodiak Island County, AK

Marine HWY Route over Kodiak City Dock

Carries Marine HWY Route over Kodiak City Dock, Kodiak.

Overall conditionGood

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

How ratings work
Decksets the rating7/9 · Good
Superstructuresets the rating7/9 · Good
Substructuresets the rating7/9 · Good
Channelnot part of overall9/9 · Excellent
0 failed4 poor6 fair9 excellent

Elevation

Side view, colored by inspection rating
SEMI-TRUCK · 72 FT230 FT OVERALL50 FT0ELEVATION · LENGTHS TO SCALE
Deck 7/9Superstructure 7/9Substructure 7/9

230 ft end to end, longest span 21 ft: about 3 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 slab bridge.

Built201610 years old
Length230.0 ft70.1 m
Daily traffic216counted 2018
Last inspectedAugust 2024every 24 months

Location

StateAlaska
CountyKodiak Island
LocationKodiak
CarriesMarine HWY Route
CrossesKodiak City Dock
Coordinates57.78719, -152.40254

Physical Characteristics

MaterialPrestressed Concrete
DesignSlab
Total Length230.0 ft (70.1 m)
Max Span21.0 ft (6.4 m)
Deck Width75.1 ft (22.9 m)
Deck Area1605.3 sq m
Main Spans2
Year Built2016

Traffic

Avg Daily Traffic216 (2018)
Truck Traffic6%
Lanes On Bridge2

Inspection & Ownership

Last InspectionAugust 2024
Inspection FrequencyEvery 24 months
OwnerCity/Municipal Highway Agency
Historical SignificanceBridge is not eligible for the National Register
Scour Critical8 — Stable, low risk
Structure Number1425

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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