Structure 9825 · Charleston County, SC

US 17 NB over US 52/meeting ST

Carries US 17 NB over US 52/meeting ST, Charleston City Limit.

Overall conditionGood

Set by its lowest-rated component: Deck at 7 of 9.

How ratings work
Decksets the rating7/9 · Good
Superstructure8/9 · Very Good
Substructure8/9 · Very Good
0 failed4 poor6 fair9 excellent

Elevation

Side view, colored by inspection rating
SEMI-TRUCK · 72 FT929 FT OVERALL200 FT0ELEVATION · LENGTHS TO SCALE
Deck 7/9 · sets the ratingSuperstructure 8/9Substructure 8/9

929 ft end to end, longest span 200 ft: about 2.6 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 multi-beam bridge.

Built200521 years old
Length929.1 ft283.2 m
Daily traffic47,050counted 2023
Last inspectedApril 2023every 24 months

Location

StateSouth Carolina
CountyCharleston
LocationCharleston City Limit
CarriesUS 17 NB
CrossesUS 52/meeting ST
Coordinates32.80248, -79.94616

Physical Characteristics

MaterialSteel Continuous
DesignStringer/Multi-beam
Total Length929.1 ft (283.2 m)
Max Span200.1 ft (61 m)
Deck Width38.7 ft (11.8 m)
Deck Area3341.8 sq m
Main Spans5
Year Built2005

Traffic

Avg Daily Traffic47,050 (2023)
Truck Traffic3%
Lanes On Bridge2
Lanes Under Bridge6

Inspection & Ownership

Last InspectionApril 2023
Inspection FrequencyEvery 24 months
OwnerState Highway Agency
Historical SignificanceBridge is not eligible for the National Register
Scour CriticalNot applicable
Structure Number000000000009825

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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