Structure 402 · Clarendon County, SC

US 521 over Deep Creek

Carries US 521 over Deep Creek, 4mi E Of Manning.

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 overall8/9 · Very Good
0 failed4 poor6 fair9 excellent

Elevation

Side view, colored by inspection rating
SEMI-TRUCK · 72 FT130 FT OVERALL25 FT0ELEVATION · LENGTHS TO SCALE
Deck 8/9 · sets the ratingSuperstructure 9/9Substructure 9/9

130 ft end to end, longest span 50 ft. 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.

Built20188 years old
Length129.9 ft39.6 m
Daily traffic3,800counted 2023
Last inspectedOctober 2023every 24 months

Location

StateSouth Carolina
CountyClarendon
Location4mi E Of Manning
CarriesUS 521
CrossesDeep Creek
Coordinates33.67181, -80.13986

Physical Characteristics

MaterialConcrete Continuous
DesignSlab
Total Length129.9 ft (39.6 m)
Max Span49.9 ft (15.2 m)
Deck Width46.9 ft (14.3 m)
Deck Area566.3 sq m
Main Spans3
Year Built2018

Traffic

Avg Daily Traffic3,800 (2023)
Truck Traffic13%
Lanes On Bridge2

Inspection & Ownership

Last InspectionOctober 2023
Inspection FrequencyEvery 24 months
OwnerState Highway Agency
Historical SignificanceBridge is not eligible for the National Register
Scour Critical8 — Stable, low risk
Structure Number000000000000402

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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