Structure 33I01240010 · Hamilton County, TN

I124 Sbl over W.main ST (fau 3553)

Carries I124 Sbl over W.main ST (fau 3553), .01 Mi FM Sr58 W 20th ST.

Overall conditionGood

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

How ratings work
Decksets the rating7/9 · 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 FT204 FT OVERALL25 FT0ELEVATION · LENGTHS TO SCALE
Deck 7/9 · sets the ratingSuperstructure 8/9Substructure 7/9 · sets the rating

204 ft end to end, longest span 122 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 multi-beam bridge.

Built20206 years old
Length204.1 ft62.2 m
Daily traffic65,235counted 2021
Last inspectedAugust 2024every 24 months

Location

StateTennessee
CountyHamilton
Location.01 Mi FM Sr58 W 20th ST
CarriesI124 Sbl
CrossesW.main ST (fau 3553)
Coordinates35.03980, -85.31770

Physical Characteristics

MaterialPrestressed Concrete Continuous
DesignStringer/Multi-beam
Total Length204.1 ft (62.2 m)
Max Span122.0 ft (37.2 m)
Deck Width74.5 ft (22.7 m)
Deck Area1411.9 sq m
Main Spans3
Year Built2020

Traffic

Avg Daily Traffic65,235 (2021)
Truck Traffic6%
Lanes On Bridge4
Lanes Under Bridge2

Inspection & Ownership

Last InspectionAugust 2024
Inspection FrequencyEvery 24 months
OwnerState Highway Agency
Historical SignificanceHistorical significance is not determined
Scour CriticalNot applicable
Structure Number33I01240010

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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