SC 391
Carrying SC 391 over CHINQUAPIN CREEK
4 MI E OF MONETTA, Aiken, South Carolina
Inventory: FHWA NBI 2024 · last ETL August 2026
FHWA NBI record, refreshed with each annual release.
SC 391 in Aiken, South Carolina sits above 34% of rated South Carolina bridges on inventory load rating (24 t), while its 1924 build year is earlier than 98% of Aiken's recorded-year cohort (198 bridges).
SC 391 in Aiken, South Carolina is rated Poor in the FHWA's 2024 National Bridge Inventory. Built in 1924, it carries 3 rated components on the inspecting agency's 0-9 scale, and its weakest reported component scores 4. The lowest applicable rating sets the federal condition category, so this Poor result describes the weakest reported component rather than the structure as a whole. No NBI category is a closure decision or a live crossing-safety verdict.
NBI record plate
Structure SC:000000000002883
PRE-1950 · CONCRETE · SINGLE-SPAN · TIED-CTRL · ARTERIAL-ADT · STANDARD-LOAD · CAT-POOR
- PRE-1950 Pre-1950
- CONCRETE Concrete
- SINGLE-SPAN Single span
- TIED-CTRL Tied control
- ARTERIAL-ADT Arterial ADT
- STANDARD-LOAD Standard load
- CAT-POOR Poor
Inspection-sheet codes from this record’s year, material family, spans, controlling component, ADT, inventory load, and NBI category, not a live closure verdict.
Bridge Snapshot: SC 391
The SC 391 bridge in Aiken, South Carolina carries SC 391 over CHINQUAPIN CREEK. It was built in 1924, making it 102 years old today. It was last reconstructed in 1959, extending its service life. The structure is built primarily of concrete and spans 1 section, stretching 52.4 meters (172 feet) end to end. Daily traffic averages 1,000 vehicles, placing it in the lower-traffic tier of South Carolina bridges. It is owned and maintained by State Highway Agency.
The latest FHWA inspection records show a deck rating of 4/9, superstructure at 4/9, substructure at 4/9. The weakest component sits in poor condition. At least one major component here scores 4 or below, which produces a Poor condition classification under FHWA's current reporting rules.
How SC 391 compares
Age against the county: built in 1924, earlier than 195 of Aiken's 198 bridges with a recorded construction year (98%), against a county median build year of 1970. Age is not a defect on its own, but it is the population from which future Poor ratings are drawn.
Live comparison across South Carolina bridges with a recorded inventory load rating (9,483 of 9,490 rated).
SC 391 vs every rated South Carolina bridge
Inventory load rating (metric tons), FHWA NBI, this state
24 Top 66% higher than 34% of 9,483 bridges
rated South Carolina bridges, bucketed by value
Each bar is a band; taller bars hold more bridges. The dashed line + filled bar mark this entry. Hover or tap any bar for its full count and share, and where it sits relative to this entry.
Source FHWA National Bridge Inventory · August 2026
Condition Ratings
Full 0–9 scale + sufficiency-rating breakdown: how condition ratings work.
Reported 0–9 component ratings from the FHWA NBI. The highlighted component is the lowest reported input to this record’s current condition category; it is not a closure or live crossing-safety decision.
Aiken inventory by recorded NBI category
Exclusive Good/Fair/Poor bands across all 198 bridges in this county. Orthogonal to this structure's component profile above: a county catalog share, not a live crossing-safety verdict.
Structural Details
- Year Built
- 1924
- Last Reconstructed
- 1959
- Material
- Concrete
- Number of Spans
- 1
- Structure Length
- 52.4 m (172 ft)
- Deck Width
- 10.0 m (33 ft)
- Owner
- State Highway Agency
- Avg Daily Traffic
- 1,000 vehicles/day
- Structure Number
- 000000000002883
Condition Analysis
- • At 4/9, the deck (driving surface) is in poor shape, with advanced wear on file for this vintage.
- • At 4/9, the superstructure (beams and supports above the deck) is in poor shape, with advanced wear on file for this vintage.
- • At 4/9, the substructure (piers and abutments) is in poor shape, with advanced wear on file for this vintage.
Location
Data Source
FHWA National Bridge Inventory (NBI).
FHWA NBI Program ↗How to read this record
SC 391 is in the federal Poor condition category. That is a component-based result, not a closure order.
- NBI condition ratings reflect the latest record in this annual dataset, not a live status. Current routine inspection intervals are risk-based.
- Understand what Poor condition does and does not mean before drawing conclusions. Poor condition explained
- Compare SC 391 against other structures in Aiken 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 SC 391?
SC 391 in Aiken, South Carolina has a deck rating of 4/9, superstructure rating of 4/9, and substructure rating of 4/9 on the FHWA's 0–9 scale.
How often is SC 391 inspected?
SC 391'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 1,000 vehicles per day.
What does “structurally deficient” mean in older bridge reports?
FHWA retired that reported status beginning with the 2018 archive. SC 391 is currently shown as Poor condition from its component ratings; that category is not a live closure or safety decision.
What is the inventory load rating for SC 391?
SC 391 has an NBI inventory load rating of 24.3 metric tons.
Who is responsible for maintaining SC 391?
SC 391 is owned and maintained by State Highway Agency.
How old is SC 391 and does age affect safety?
SC 391 was built in 1924, making it 102 years old and last reconstructed in 1959.
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.
Share this inspection record
Send this source-bounded record or download its data card. An NBI condition category is not a closure or live crossing-safety verdict.
Every figure on PlainBridges is rendered directly from federal source data, no number is typed in by an editor. Component ratings, ADT, and condition category on this page are copied from the NBI record for this structure; no figure is typed in by an editor. See our editorial standards & corrections policy, the methodology behind these numbers, or report a data error. Data current as of 2024 NBI release. NBI condition categories reflect the latest reported inventory record, not a live safety, closure, or travel decision.