Structure 150 · Berkeley County, SC

US 52 over Santee River Swamp

Carries US 52 over Santee River Swamp, 18.8mi NE Moncks Crn.

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 overall7/9 · Good
0 failed4 poor6 fair9 excellent

Elevation

Side view, colored by inspection rating
SEMI-TRUCK · 72 FT750 FT OVERALL100 FT0ELEVATION · LENGTHS TO SCALE
Deck 6/9 · sets the ratingSuperstructure 6/9 · sets the ratingSubstructure 7/9

750 ft end to end, longest span 30 ft: about 2.1 football fields. 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.

Built199927 years old
Length750.0 ft228.6 m
Daily traffic4,700counted 2023
Last inspectedSeptember 2023every 24 months

Location

StateSouth Carolina
CountyBerkeley
Location18.8mi NE Moncks Crn
CarriesUS 52
CrossesSantee River Swamp
Coordinates33.46305, -79.97547

Physical Characteristics

MaterialConcrete Continuous
DesignSlab
Total Length750.0 ft (228.6 m)
Max Span29.9 ft (9.1 m)
Deck Width86.0 ft (26.2 m)
Deck Area5989.3 sq m
Main Spans25
Year Built1999

Traffic

Avg Daily Traffic4,700 (2023)
Truck Traffic17%
Lanes On Bridge4

Inspection & Ownership

Last InspectionSeptember 2023
Inspection FrequencyEvery 24 months
OwnerState Highway Agency
Historical SignificanceBridge is not eligible for the National Register
Scour CriticalUnknown
Structure Number000000000000150

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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