Structure 1981 · Fairbanks North Star County, AK

Thompson Drive over Thompson DR Overhead

Carries Thompson Drive over Thompson DR Overhead, Univeristy Of Ak.

Overall conditionGood

Set by its lowest-rated component: Substructure at 7 of 9.

How ratings work
Deck8/9 · Very Good
Superstructure8/9 · Very Good
Substructuresets the rating7/9 · Good
0 failed4 poor6 fair9 excellent

Elevation

Side view, colored by inspection rating
SEMI-TRUCK · 72 FT243 FT OVERALL50 FT0ELEVATION · LENGTHS TO SCALE
Deck 8/9Superstructure 8/9Substructure 7/9 · sets the rating

243 ft end to end, longest span 83 ft: about 3 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.

Built200521 years old
Length242.8 ft74 m
Daily traffic4,120counted 2020
Last inspectedAugust 2024every 24 months

Location

StateAlaska
CountyFairbanks North Star
LocationUniveristy Of Ak
CarriesThompson Drive
CrossesThompson DR Overhead
Coordinates64.85444, -147.84076

Physical Characteristics

MaterialPrestressed Concrete
DesignTee Beam
Total Length242.8 ft (74 m)
Max Span83.0 ft (25.3 m)
Deck Width55.8 ft (17 m)
Deck Area1,258 sq m
Main Spans3
Year Built2005

Traffic

Avg Daily Traffic4,120 (2020)
Truck Traffic4%
Lanes On Bridge2

Inspection & Ownership

Last InspectionAugust 2024
Inspection FrequencyEvery 24 months
OwnerOther State Agencies
Historical SignificanceBridge is not eligible for the National Register
Scour CriticalNot applicable
Structure Number1981

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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