Structure 8877 · DeKalb County, AL

Co RT 159 over Flat Rock Creek

Carries Co RT 159 over Flat Rock Creek, 1 Mi E Jackson Co T3sr9e.

Overall conditionFair

Set by its lowest-rated component: Superstructure at 5 of 9.

How ratings work
Deck7/9 · Good
Superstructuresets the rating5/9 · Fair
Substructure6/9 · Satisfactory
Channelnot part of overall7/9 · Good
0 failed4 poor6 fair9 excellent

Elevation

Side view, colored by inspection rating
CAR · 15 FT53 FT OVERALL25 FT0ELEVATION · LENGTHS TO SCALE
Deck 7/9Superstructure 5/9 · sets the ratingSubstructure 6/9

53 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.

Built196561 years old
Length53.1 ft16.2 m
Daily traffic112counted 2024
Last inspectedMarch 2024every 24 months

Location

StateAlabama
CountyDeKalb
Location1 Mi E Jackson Co T3sr9e
CarriesCo RT 159
CrossesFlat Rock Creek
Coordinates34.74448, -85.67380

Physical Characteristics

MaterialConcrete
DesignChannel Beam
Total Length53.1 ft (16.2 m)
Max Span34.1 ft (10.4 m)
Deck Width25.9 ft (7.9 m)
Deck Area128.0 sq m
Main Spans2
Year Built1965

Traffic

Avg Daily Traffic112 (2024)
Truck Traffic2%
Lanes On Bridge2

Inspection & Ownership

Last InspectionMarch 2024
Inspection FrequencyEvery 24 months
OwnerCounty Highway Agency
Historical SignificanceBridge is not eligible for the National Register
Scour Critical5 — Stable for scour
Structure Number008877

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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