Structure 20530 · Chilton County, AL

County Road 455 over Walnut Creek

Carries County Road 455 over Walnut Creek, Cr455 1 Mn Glad Tiding Ch.

Overall conditionGood

Set by its lowest-rated component: Deck at 8 of 9.

How ratings work
Decksets the rating8/9 · Very Good
Superstructure9/9 · Excellent
Substructure9/9 · Excellent
Channelnot part of overall7/9 · Good
0 failed4 poor6 fair9 excellent

Elevation

Side view, colored by inspection rating
CAR · 15 FT68 FT OVERALL25 FT0ELEVATION · LENGTHS TO SCALE
Deck 8/9 · sets the ratingSuperstructure 9/9Substructure 9/9

68 ft end to end, longest span 34 ft. 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 or the layout of the shorter spans, so those are drawn as typical for a channel-beam bridge.

Built201115 years old
Length67.9 ft20.7 m
Daily traffic125counted 2010
Last inspectedDecember 2023every 24 months

Location

StateAlabama
CountyChilton
LocationCr455 1 Mn Glad Tiding Ch
CarriesCounty Road 455
CrossesWalnut Creek
Coordinates32.87333, -86.58075

Physical Characteristics

MaterialConcrete
DesignChannel Beam
Total Length67.9 ft (20.7 m)
Max Span34.1 ft (10.4 m)
Deck Width31.5 ft (9.6 m)
Deck Area198.7 sq m
Main Spans2
Year Built2011

Traffic

Avg Daily Traffic125 (2010)
Lanes On Bridge2

Inspection & Ownership

Last InspectionDecember 2023
Inspection FrequencyEvery 24 months
OwnerCounty Highway Agency
Historical SignificanceBridge is not eligible for the National Register
Scour Critical5 — Stable for scour
Structure Number020530

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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