Structure 9545 · Williamsburg County, SC

US 52 over Black River Swamp

Carries US 52 over Black River Swamp, 1 Mi S Of Kingstree.

Overall conditionFair

Set by its lowest-rated component: Deck and Superstructure at 6 of 9.

How ratings work
Decksets the rating6/9 · Satisfactory
Superstructuresets the rating6/9 · Satisfactory
Substructure7/9 · Good
Channelnot part of overall8/9 · Very Good
0 failed4 poor6 fair9 excellent

Elevation

Side view, colored by inspection rating
SEMI-TRUCK · 72 FT450 FT OVERALL50 FT0ELEVATION · LENGTHS TO SCALE
Deck 6/9 · sets the ratingSuperstructure 6/9 · sets the ratingSubstructure 7/9

450 ft end to end, longest span 30 ft: about 6 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 slab bridge.

Built200026 years old
Length450.1 ft137.2 m
Daily traffic6,100counted 2023
Last inspectedNovember 2024every 24 months

Location

StateSouth Carolina
CountyWilliamsburg
Location1 Mi S Of Kingstree
CarriesUS 52
CrossesBlack River Swamp
Coordinates33.65776, -79.85811

Physical Characteristics

MaterialConcrete Continuous
DesignSlab
Total Length450.1 ft (137.2 m)
Max Span29.9 ft (9.1 m)
Deck Width86.0 ft (26.2 m)
Deck Area3594.6 sq m
Main Spans15
Year Built2000

Traffic

Avg Daily Traffic6,100 (2023)
Truck Traffic12%
Lanes On Bridge5

Inspection & Ownership

Last InspectionNovember 2024
Inspection FrequencyEvery 24 months
OwnerState Highway Agency
Historical SignificanceBridge is not eligible for the National Register
Scour Critical5 — Stable for scour
Structure Number000000000009545

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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