Structure 694 · Denali County, AK

Parks Highway over Nenana River Park Bnd

Carries Parks Highway over Nenana River Park Bnd, Mile Point 195.5.

Overall conditionFair

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

How ratings work
Deck7/9 · Good
Superstructuresets the rating6/9 · Satisfactory
Substructure7/9 · Good
Channelnot part of overall6/9 · Satisfactory
0 failed4 poor6 fair9 excellent

Elevation

Side view, colored by inspection rating
SEMI-TRUCK · 72 FT358 FT OVERALL50 FT0ELEVATION · LENGTHS TO SCALE
Deck 7/9Superstructure 6/9 · sets the ratingSubstructure 7/9

358 ft end to end, longest span 140 ft: about 5 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 multi-beam bridge.

Built1973rebuilt 2006
Length358.3 ft109.2 m
Daily traffic1,680counted 2020
Last inspectedJuly 2024every 24 months

Location

StateAlaska
CountyDenali
LocationMile Point 195.5
CarriesParks Highway
CrossesNenana River Park Bnd
Coordinates63.65632, -148.83592

Physical Characteristics

MaterialSteel Continuous
DesignStringer/Multi-beam
Total Length358.3 ft (109.2 m)
Max Span140.1 ft (42.7 m)
Deck Width35.1 ft (10.7 m)
Deck Area1168.4 sq m
Main Spans3
Year Built1973 (reconstructed 2006)

Traffic

Avg Daily Traffic1,680 (2020)
Truck Traffic26%
Lanes On Bridge2

Inspection & Ownership

Last InspectionJuly 2024
Inspection FrequencyEvery 24 months
OwnerState Highway Agency
Historical SignificanceBridge is not eligible for the National Register
Scour Critical3 — Scour critical
Structure Number0694

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.