S-10-20/MAIN RD
Carrying S-10-20/MAIN RD over STONO RIVER
9.5 MI W CHARLESTON, Charleston, South Carolina
Data updated May 2026
FHWA NBI record, refreshed with each annual release.
Bridge Snapshot: S-10-20/MAIN RD
The S-10-20/MAIN RD bridge in Charleston, South Carolina carries S-10-20/MAIN RD over STONO RIVER. It was built in 2004, making it 22 years old today. The structure is built primarily of steel continuous and spans 3 sections, stretching 817.6 meters (2683 feet) end to end. Daily traffic averages 30,500 vehicles, placing it in the heavily-trafficked tier of South Carolina bridges. It is owned and maintained by State Highway Agency.
The latest FHWA inspection records show a deck rating of 7/9, superstructure at 7/9, substructure at 7/9. The weakest component sits in good condition. No reported major component scores in the Poor range under the current federal condition thresholds. Its NBI inventory load rating is 20.7 metric tons.
Sourced from the FHWA National Bridge Inventory. See our methodology for refresh cadence and NBI release vintage.
How S-10-20/MAIN RD compares
Live comparison across South Carolina.
Historical Sufficiency Rating
PlainBridge-computedFHWA discontinued this calculated item; it does not determine current condition, funding eligibility, posting, or closure. How the historical reference is calculated.
Condition Ratings
Full 0–9 scale + sufficiency-rating breakdown: how condition ratings work.
Structural Details
- Year Built
- 2004
- Material
- Steel Continuous
- Number of Spans
- 3
- Structure Length
- 817.6 m (2683 ft)
- Deck Width
- 17.4 m (57 ft)
- Owner
- State Highway Agency
- Avg Daily Traffic
- 30,500 vehicles/day
- Structure Number
- 000000000002668
Location
Data Source
FHWA National Bridge Inventory (NBI).
FHWA NBI Program ↗Condition Analysis
- • The deck (driving surface) rates good at 7/9, with no significant deterioration on file.
- • The superstructure (beams and supports above the deck) rates good at 7/9, with no significant deterioration on file.
- • The substructure (piers and abutments) is in good condition (7/9), showing no significant deterioration.
How to read this record
This page shows what the last federal inspection recorded, not whether S-10-20/MAIN RD is safe to cross today. Here is how to use it.
- NBI condition ratings reflect the latest record in this annual dataset, not a live status. Current routine inspection intervals are risk-based.
- Learn how the 0–9 condition scale and Good/Fair/Poor categories are defined. How condition ratings work
- Compare S-10-20/MAIN RD against other structures in Charleston and across South Carolina. South Carolina bridges
- Noticed visible damage or a safety concern? Report it to the agency that owns the bridge, or call 911 in an emergency. How to report a bridge
Condition codes come straight from the FHWA National Bridge Inventory and are not a real-time safety judgment. Only the owning agency, a state DOT, county, or other owner, can post, restrict, or close a bridge.
Frequently Asked Questions
What do the condition ratings mean for S-10-20/MAIN RD?
S-10-20/MAIN RD in Charleston, South Carolina has a deck rating of 7/9, superstructure rating of 7/9, and substructure rating of 7/9 on the FHWA's 0–9 scale.
How often is S-10-20/MAIN RD inspected?
S-10-20/MAIN RD's responsible agency sets its routine interval under FHWA's risk-based inspection rules; this page does not expose the scheduled interval. It carries about 30,500 vehicles per day.
What does “structurally deficient” mean in older bridge reports?
FHWA retired that reported status beginning with the 2018 archive. S-10-20/MAIN RD is currently shown as Good condition from its component ratings; that category is not a live closure or safety decision.
What is the inventory load rating for S-10-20/MAIN RD?
S-10-20/MAIN RD has an NBI inventory load rating of 20.7 metric tons.
Who is responsible for maintaining S-10-20/MAIN RD?
S-10-20/MAIN RD is owned and maintained by State Highway Agency.
How old is S-10-20/MAIN RD and does age affect safety?
S-10-20/MAIN RD was built in 2004, making it 22 years old.
Disclaimer: Bridge condition data is from the FHWA NBI and reflects the last reported inspection. A Poor condition rating is not a live declaration that a bridge is closed or unsafe for travel. For current closure, posting, or safety information, contact the responsible transportation agency.
Every figure on PlainBridge is rendered directly from federal source data, no number is typed in by an editor. This page draws directly on federal source data, no figure is typed in by an editor. See our editorial standards & corrections policy, the methodology behind these numbers, or report a data error.