Structure 2286 · Matanuska-Susitna County, AK

Lower Road over Wasilla Creek

Carries Lower Road over Wasilla Creek, Mile Point 1.7.

Overall conditionFair

Set by its lowest-rated component: Substructure at 6 of 9.

How ratings work
Deck8/9 · Very Good
Superstructure8/9 · Very Good
Substructuresets the rating6/9 · Satisfactory
Channelnot part of overall7/9 · Good
0 failed4 poor6 fair9 excellent

Elevation

Side view, colored by inspection rating
CAR · 15 FT42 FT OVERALL25 FT0ELEVATION · LENGTHS TO SCALE
Deck 8/9Superstructure 8/9Substructure 6/9 · sets the rating

42 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.

Built201016 years old
Length42.0 ft12.8 m
Daily traffic100counted 2018
Last inspectedJune 2024every 24 months

Location

StateAlaska
CountyMatanuska-Susitna
LocationMile Point 1.7
CarriesLower Road
CrossesWasilla Creek
Coordinates61.57637, -149.28437

Physical Characteristics

MaterialSteel
DesignStringer/Multi-beam
Total Length42.0 ft (12.8 m)
Max Span41.3 ft (12.6 m)
Deck Width27.9 ft (8.5 m)
Deck Area108.8 sq m
Main Spans1
Year Built2010

Traffic

Avg Daily Traffic100 (2018)
Truck Traffic1%
Lanes On Bridge2

Inspection & Ownership

Last InspectionJune 2024
Inspection FrequencyEvery 24 months
OwnerCounty Highway Agency
Historical SignificanceBridge is not eligible for the National Register
Scour Critical8 — Stable, low risk
Structure Number2286

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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