Structure 1348 · Charleston County, SC

Sc 703 over Shem Creek

Carries Sc 703 over Shem Creek, In Mt Pleasant.

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 overall7/9 · Good
0 failed4 poor6 fair9 excellent

Elevation

Side view, colored by inspection rating
SEMI-TRUCK · 72 FT310 FT OVERALL50 FT0ELEVATION · LENGTHS TO SCALE
Deck 5/9Superstructure 5/9Substructure 4/9 · sets the rating

310 ft end to end, longest span 40 ft: about 4 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 tee-beam bridge.

Built1947rebuilt 1958
Length310.0 ft94.5 m
Daily traffic37,500counted 2023
Last inspectedAugust 2024every 12 months

Location

StateSouth Carolina
CountyCharleston
LocationIn Mt Pleasant
CarriesSc 703
CrossesShem Creek
Coordinates32.79299, -79.88107

Physical Characteristics

MaterialConcrete
DesignTee Beam
Total Length310.0 ft (94.5 m)
Max Span40.0 ft (12.2 m)
Deck Width68.6 ft (20.9 m)
Deck Area1975.0 sq m
Main Spans10
Year Built1947 (reconstructed 1958)

Traffic

Avg Daily Traffic37,500 (2023)
Truck Traffic2%
Lanes On Bridge4

Inspection & Ownership

Last InspectionAugust 2024
Inspection FrequencyEvery 12 months
OwnerState Highway Agency
Historical SignificanceHistorical significance is not determined
Scour Critical3 — Scour critical
Structure Number000000000001348

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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