Structure 2128 · Matanuska-Susitna County, AK

Grubstake-hatchers over Willow Creek

Carries Grubstake-hatchers over Willow Creek, Mile Point 0.1.

Overall conditionPoor

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

How ratings work
Deck5/9 · Fair
Superstructuresets the rating2/9 · Critical
Substructure3/9 · Serious
Channelnot part of overall7/9 · Good
0 failed4 poor6 fair9 excellent

Elevation

Side view, colored by inspection rating
CAR · 15 FT41 FT OVERALL25 FT0ELEVATION · LENGTHS TO SCALE
Deck 5/9Superstructure 2/9 · sets the ratingSubstructure 3/9

41 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 bridge of this kind.

Built194581 years old
Length41.3 ft12.6 m
Daily traffic10counted 2010
Last inspectedJune 2024every 24 months

Location

StateAlaska
CountyMatanuska-Susitna
LocationMile Point 0.1
CarriesGrubstake-hatchers
CrossesWillow Creek
Coordinates61.75891, -149.44321

Physical Characteristics

MaterialSteel
DesignOther
Total Length41.3 ft (12.6 m)
Max Span37.1 ft (11.3 m)
Deck Width19.4 ft (5.9 m)
Deck Area74.3 sq m
Main Spans1
Year Built1945

Traffic

Avg Daily Traffic10 (2010)
Truck Traffic1%
Lanes On Bridge1

Inspection & Ownership

Last InspectionJune 2024
Inspection FrequencyEvery 24 months
OwnerState Highway Agency
Historical SignificanceBridge is not eligible for the National Register
Scour CriticalUnknown
Structure Number2128

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.