Structure 3337 · Blount County, AL

Swann Bridge Road over Unk Creek To Locust Fork

Carries Swann Bridge Road over Unk Creek To Locust Fork, 1/2 Mi W Of Cleveland.

Overall conditionPoor

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

How ratings work
Deck6/9 · Satisfactory
Superstructure5/9 · Fair
Substructuresets the rating4/9 · Poor
Channelnot part of overall5/9 · Fair
0 failed4 poor6 fair9 excellent

Elevation

Side view, colored by inspection rating
21 FT OVERALL25 FT0ELEVATION · LENGTHS TO SCALE
Deck 6/9Superstructure 5/9Substructure 4/9 · sets the rating

21 ft end to end. Lengths are drawn to scale; at this length a semi-truck would be a speck. 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.

Built194878 years old
Length21.0 ft6.4 m
Daily traffic324counted 2020
Last inspectedOctober 2020every 24 months

Location

StateAlabama
CountyBlount
Location1/2 Mi W Of Cleveland
CarriesSwann Bridge Road
CrossesUnk Creek To Locust Fork
Coordinates33.99554, -86.60074

Physical Characteristics

MaterialSteel
DesignStringer/Multi-beam
Total Length21.0 ft (6.4 m)
Max Span21.0 ft (6.4 m)
Deck Width14.8 ft (4.5 m)
Deck Area28.8 sq m
Main Spans1
Year Built1948

Traffic

Avg Daily Traffic324 (2020)
Lanes On Bridge1

Inspection & Ownership

Last InspectionOctober 2020
Inspection FrequencyEvery 24 months
OwnerCounty Highway Agency
Historical SignificanceBridge is not eligible for the National Register
Scour Critical4 — Foundations need monitoring
Structure Number003337

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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