Structure 2273 · Anchorage County, AK

West Dowling Road over W Dowling Road Oc

Carries West Dowling Road over W Dowling Road Oc, Mile Point 3.0.

Overall conditionGood

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

How ratings work
Deck9/9 · Excellent
Superstructure8/9 · Very Good
Substructuresets the rating7/9 · Good
0 failed4 poor6 fair9 excellent

Elevation

Side view, colored by inspection rating
SEMI-TRUCK · 72 FT200 FT OVERALL25 FT0ELEVATION · LENGTHS TO SCALE
Deck 9/9Superstructure 8/9Substructure 7/9 · sets the rating

200 ft end to end: 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 box-beam bridge.

Built201511 years old
Length199.8 ft60.9 m
Daily traffic9,450counted 2020
Last inspectedAugust 2023every 24 months

Location

StateAlaska
CountyAnchorage
LocationMile Point 3.0
CarriesWest Dowling Road
CrossesW Dowling Road Oc
Coordinates61.16567, -149.89772

Physical Characteristics

MaterialSteel
DesignBox Beam - Multiple
Total Length199.8 ft (60.9 m)
Max Span194.9 ft (59.4 m)
Deck Width103.7 ft (31.6 m)
Deck Area1924.4 sq m
Main Spans1
Year Built2015

Traffic

Avg Daily Traffic9,450 (2020)
Truck Traffic4%
Lanes On Bridge4
Lanes Under Bridge2

Inspection & Ownership

Last InspectionAugust 2023
Inspection FrequencyEvery 24 months
OwnerState Highway Agency
Historical SignificanceBridge is not eligible for the National Register
Scour CriticalNot applicable
Structure Number2273

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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