Structure 9830013P0000000 · Yukon-Koyukuk County, AK

Denali Park Road over Toklat River

Carries Denali Park Road over Toklat River, 53.33 Miles West Of Ak Ro.

Overall conditionFair

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

How ratings work
Deck7/9 · Good
Superstructuresets the rating6/9 · Satisfactory
Substructuresets the rating6/9 · Satisfactory
Channelnot part of overall6/9 · Satisfactory
0 failed4 poor6 fair9 excellent

Elevation

Side view, colored by inspection rating
SEMI-TRUCK · 72 FT430 FT OVERALL50 FT0ELEVATION · LENGTHS TO SCALE
Deck 7/9Superstructure 6/9 · sets the ratingSubstructure 6/9 · sets the rating

430 ft end to end, longest span 119 ft: about 6 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.

Built198739 years old
Length430.1 ft131.1 m
Daily traffic300counted 2013
Last inspectedJuly 2024every 24 months

Location

StateAlaska
CountyYukon-Koyukuk
Location53.33 Miles West Of Ak Ro
CarriesDenali Park Road
CrossesToklat River
Coordinates63.51872, -150.03183

Physical Characteristics

MaterialConcrete Continuous
DesignBox Beam - Single/Spread
Total Length430.1 ft (131.1 m)
Max Span119.1 ft (36.3 m)
Deck Width31.5 ft (9.6 m)
Deck Area1258.6 sq m
Main Spans4
Year Built1987

Traffic

Avg Daily Traffic300 (2013)
Truck Traffic1%
Lanes On Bridge2

Inspection & Ownership

Last InspectionJuly 2024
Inspection FrequencyEvery 24 months
OwnerNational Park Service
Historical SignificanceBridge is not eligible for the National Register
Scour Critical4 — Foundations need monitoring
Structure Number9830013P0000000

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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