Structure 1287 · Berkeley County, SC

US 52/us 17 Alt over Cooper River

Carries US 52/us 17 Alt over Cooper River, 1 Mi N Of Moncks Corner.

Overall conditionPoor

Set by its lowest-rated component: Substructure at 4 of 9.

How ratings work
Deck5/9 · Fair
Superstructure5/9 · Fair
Substructuresets the rating4/9 · Poor
Channelnot part of overall4/9 · Poor
0 failed4 poor6 fair9 excellent

Elevation

Side view, colored by inspection rating
SEMI-TRUCK · 72 FT766 FT OVERALL100 FT0ELEVATION · LENGTHS TO SCALE
Deck 5/9Superstructure 5/9Substructure 4/9 · sets the rating

766 ft end to end, longest span 140 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 multi-beam bridge.

Built1944rebuilt 1976
Length766.1 ft233.5 m
Daily traffic29,000counted 2023
Last inspectedSeptember 2023every 24 months

Location

StateSouth Carolina
CountyBerkeley
Location1 Mi N Of Moncks Corner
CarriesUS 52/us 17 Alt
CrossesCooper River
Coordinates33.21492, -79.97504

Physical Characteristics

MaterialSteel Continuous
DesignStringer/Multi-beam
Total Length766.1 ft (233.5 m)
Max Span140.1 ft (42.7 m)
Deck Width76.4 ft (23.3 m)
Deck Area5440.6 sq m
Main Spans7
Year Built1944 (reconstructed 1976)

Traffic

Avg Daily Traffic29,000 (2023)
Truck Traffic5%
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 Critical8 — Stable, low risk
Structure Number000000000001287

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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