Structure 1229 · Sumter County, SC

US 76 over Green Swamp

Carries US 76 over Green Swamp, 4 Mi NW Of Sumter.

Overall conditionFair

Set by its lowest-rated component: Culvert at 6 of 9.

How ratings work
Culvertsets the rating6/9 · Satisfactory
Channelnot part of overall5/9 · Fair
0 failed4 poor6 fair9 excellent

Elevation

Side view, colored by inspection rating
CAR · 15 FT43 FT ACROSS25 FT0ELEVATION · LENGTHS TO SCALE
Culvert 6/9

A culvert 43 ft across with 4 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.

Built1941rebuilt 1957
Length43.0 ft13.1 m
Daily traffic30,400counted 2023
Last inspectedJune 2024every 24 months

Location

StateSouth Carolina
CountySumter
Location4 Mi NW Of Sumter
CarriesUS 76
CrossesGreen Swamp
Coordinates33.95722, -80.39306

Physical Characteristics

MaterialConcrete
DesignCulvert
Total Length43.0 ft (13.1 m)
Max Span9.8 ft (3 m)
Deck Width102.0 ft (31.1 m)
Deck Area407.4 sq m
Main Spans4
Year Built1941 (reconstructed 1957)

Traffic

Avg Daily Traffic30,400 (2023)
Truck Traffic6%
Lanes On Bridge4

Inspection & Ownership

Last InspectionJune 2024
Inspection FrequencyEvery 24 months
OwnerState Highway Agency
Historical SignificanceHistorical significance is not determined
Scour Critical8 — Stable, low risk
Structure Number000000000001229

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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