Structure 1746 · County 066 County, AK

Richardson Highway over Klutina River

Carries Richardson Highway over Klutina River, Mile Point 104.9.

Overall conditionFair

Set by its lowest-rated component: Substructure at 5 of 9.

How ratings work
Deck7/9 · Good
Superstructure6/9 · Satisfactory
Substructuresets the rating5/9 · Fair
Channelnot part of overall7/9 · Good
0 failed4 poor6 fair9 excellent

Elevation

Side view, colored by inspection rating
SEMI-TRUCK · 72 FT308 FT OVERALL50 FT0ELEVATION · LENGTHS TO SCALE
Deck 7/9Superstructure 6/9Substructure 5/9 · sets the rating

308 ft end to end, longest span 115 ft: about 4 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 tee-beam bridge.

Built198937 years old
Length308.1 ft93.9 m
Daily traffic410counted 2020
Last inspectedAugust 2023every 24 months

Location

StateAlaska
CountyCounty 066
LocationMile Point 104.9
CarriesRichardson Highway
CrossesKlutina River
Coordinates61.95417, -145.32333

Physical Characteristics

MaterialPrestressed Concrete
DesignTee Beam
Total Length308.1 ft (93.9 m)
Max Span115.2 ft (35.1 m)
Deck Width38.4 ft (11.7 m)
Deck Area1098.6 sq m
Main Spans3
Year Built1989

Traffic

Avg Daily Traffic410 (2020)
Truck Traffic33%
Lanes On Bridge2

Inspection & Ownership

Last InspectionAugust 2023
Inspection FrequencyEvery 24 months
OwnerState Highway Agency
Historical SignificanceBridge is not eligible for the National Register
Scour Critical8 — Stable, low risk
Structure Number1746

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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