Structure 8617 · Charleston County, SC
Carries Sc 30 over Ashley Riv & Wappoo Crk, In Charleston.
Set by its lowest-rated component: Deck and Superstructure and Substructure at 6 of 9.
How ratings work11,297 ft end to end, longest span 157 ft: about 31 football fields, or 2.1 miles. Lengths are drawn to scale; at this length a semi-truck would be a speck. 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 box-beam bridge.
| State | South Carolina |
| County | Charleston |
| Location | In Charleston |
| Carries | Sc 30 |
| Crosses | Ashley Riv & Wappoo Crk |
| Coordinates | 32.77930, -79.95714 |
| Material | Prestressed Concrete Continuous |
| Design | Box Beam - Single/Spread |
| Total Length | 11296.9 ft (3443.3 m) |
| Max Span | 157.2 ft (47.9 m) |
| Deck Width | 85.3 ft (26 m) |
| Deck Area | 89525.8 sq m |
| Main Spans | 74 |
| Year Built | 1993 |
| Avg Daily Traffic | 61,400 (2023) |
| Truck Traffic | 3% |
| Lanes On Bridge | 4 |
| Lanes Under Bridge | 12 |
| Last Inspection | February 2024 |
| Inspection Frequency | Every 24 months |
| Owner | State Highway Agency |
| Historical Significance | Bridge is not eligible for the National Register |
| Scour Critical | 5 — Stable for scour |
| Structure Number | 000000000008617 |
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."
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.