Structure 10436 · Berkeley County, SC

US 176/state RD over Dean Swamp

Carries US 176/state RD over Dean Swamp, 5 Mi SE Of Holly Hill.

Overall conditionGood

Set by its lowest-rated component: Deck and Superstructure and Substructure at 8 of 9.

How ratings work
Decksets the rating8/9 · Very Good
Superstructuresets the rating8/9 · Very Good
Substructuresets the rating8/9 · Very Good
Channelnot part of overall9/9 · Excellent
0 failed4 poor6 fair9 excellent

Elevation

Side view, colored by inspection rating
SEMI-TRUCK · 72 FT240 FT OVERALL50 FT0ELEVATION · LENGTHS TO SCALE
Deck 8/9Superstructure 8/9Substructure 8/9

240 ft end to end, longest span 40 ft: about 3 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.

Built20224 years old
Length240.2 ft73.2 m
Daily traffic7,800counted 2023
Last inspectedMay 2024every 24 months

Location

StateSouth Carolina
CountyBerkeley
Location5 Mi SE Of Holly Hill
CarriesUS 176/state RD
CrossesDean Swamp
Coordinates33.27609, -80.35089

Physical Characteristics

MaterialConcrete Continuous
DesignSlab
Total Length240.2 ft (73.2 m)
Max Span40.0 ft (12.2 m)
Deck Width61.0 ft (18.6 m)
Deck Area1361.5 sq m
Main Spans3
Year Built2022

Traffic

Avg Daily Traffic7,800 (2023)
Truck Traffic18%
Lanes On Bridge2

Inspection & Ownership

Last InspectionMay 2024
Inspection FrequencyEvery 24 months
OwnerState Highway Agency
Historical SignificanceBridge is not eligible for the National Register
Scour Critical8 — Stable, low risk
Structure Number000000000010436

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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