Structure 33L35660001 · Hamilton County, TN

Fau 3566 over Inactive Ns Rr Spur

Carries Fau 3566 over Inactive Ns Rr Spur, In Downtown Chattanooga.

Overall conditionPoor

Set by its lowest-rated component: Substructure at 4 of 9.

How ratings work
Deck5/9 · Fair
Superstructure5/9 · Fair
Substructuresets the rating4/9 · Poor
0 failed4 poor6 fair9 excellent

Elevation

Side view, colored by inspection rating
SEMI-TRUCK · 72 FT977 FT OVERALL200 FT0ELEVATION · LENGTHS TO SCALE
Deck 5/9Superstructure 5/9Substructure 4/9 · sets the rating

977 ft end to end: about 2.7 football fields. 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 girder bridge.

Built1906rebuilt 1947
Length977.0 ft297.8 m
Daily traffic2,659counted 2021
Last inspectedFebruary 2024every 24 months

Location

StateTennessee
CountyHamilton
LocationIn Downtown Chattanooga
CarriesFau 3566
CrossesInactive Ns Rr Spur
Coordinates35.03952, -85.29823

Physical Characteristics

MaterialSteel
DesignGirder and Floorbeam
Total Length977.0 ft (297.8 m)
Max Span97.8 ft (29.8 m)
Deck Width51.8 ft (15.8 m)
Deck Area4705.2 sq m
Main Spans1
Year Built1906 (reconstructed 1947)

Traffic

Avg Daily Traffic2,659 (2021)
Truck Traffic3%
Lanes On Bridge2

Inspection & Ownership

Last InspectionFebruary 2024
Inspection FrequencyEvery 24 months
OwnerCity/Municipal Highway Agency
Historical SignificanceHistorical significance is not determined
Scour CriticalNot applicable
Structure Number33L35660001

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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