Structure 650A1530005 · Morgan County, TN

Nfa A153 over Island Creek

Carries Nfa A153 over Island Creek, Catoosa Wma.

Overall conditionPoor

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

How ratings work
Culvertsets the rating4/9 · Poor
Channelnot part of overall4/9 · Poor
0 failed4 poor6 fair9 excellent

Elevation

Side view, colored by inspection rating
CAR · 15 FT31 FT ACROSS25 FT0ELEVATION · LENGTHS TO SCALE
Culvert 4/9

A culvert 31 ft across with 5 openings. Lengths and the car 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, so those are drawn as typical for a culvert.

Built195373 years old
Length30.8 ft9.4 m
Daily traffic100counted 2020
Last inspectedMay 2023every 24 months

Location

StateTennessee
CountyMorgan
LocationCatoosa Wma
CarriesNfa A153
CrossesIsland Creek
Coordinates36.02998, -84.72052

Physical Characteristics

MaterialSteel
DesignCulvert
Total Length30.8 ft (9.4 m)
Max Span4.9 ft (1.5 m)
Deck Width14.1 ft (4.3 m)
Deck Area40.4 sq m
Main Spans5
Year Built1953

Traffic

Avg Daily Traffic100 (2020)
Truck Traffic2%
Lanes On Bridge1

Inspection & Ownership

Last InspectionMay 2023
Inspection FrequencyEvery 24 months
OwnerState Park/Forest Agency
Historical SignificanceHistorical significance is not determined
Scour Critical8 — Stable, low risk
Structure Number650A1530005

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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