Structure 881 · Nome County, AK

Irr:jafet Drive over Snake River

Carries Irr:jafet Drive over Snake River, Mile Point 0.1.

Overall conditionGood

Set by its lowest-rated component: Superstructure and Substructure at 8 of 9.

How ratings work
Deck9/9 · Excellent
Superstructuresets the rating8/9 · Very Good
Substructuresets the rating8/9 · Very Good
Channelnot part of overall9/9 · Excellent
0 failed4 poor6 fair9 excellent

Elevation

Side view, colored by inspection rating
SEMI-TRUCK · 72 FT318 FT OVERALL50 FT0ELEVATION · LENGTHS TO SCALE
Deck 9/9Superstructure 8/9 · sets the ratingSubstructure 8/9 · sets the rating

318 ft end to end, longest span 106 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.

Built201313 years old
Length317.9 ft96.9 m
Daily traffic1,000counted 2020
Last inspectedAugust 2024every 24 months

Location

StateAlaska
CountyNome
LocationMile Point 0.1
CarriesIrr:jafet Drive
CrossesSnake River
Coordinates64.50546, -165.42432

Physical Characteristics

MaterialPrestressed Concrete
DesignTee Beam
Total Length317.9 ft (96.9 m)
Max Span106.0 ft (32.3 m)
Deck Width43.3 ft (13.2 m)
Deck Area1279.1 sq m
Main Spans3
Year Built2013

Traffic

Avg Daily Traffic1,000 (2020)
Truck Traffic8%
Lanes On Bridge2

Inspection & Ownership

Last InspectionAugust 2024
Inspection FrequencyEvery 24 months
OwnerState Highway Agency
Historical SignificanceBridge is not eligible for the National Register
Scour Critical8 — Stable, low risk
Structure Number0881

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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