CR 121
Carrying CR 121 over DEEP CREEK
0.9 MI NORTH OF CR 108, Nassau, Florida
Inventory: FHWA NBI 2024 · last ETL August 2026
FHWA NBI record, refreshed with each annual release.
CR 121 in Nassau, Florida sits above 9% of rated Florida bridges on inventory load rating (24 t), while its 1949 build year is earlier than 82% of Nassau's recorded-year cohort (104 bridges).
CR 121 in Nassau, Florida is rated Poor in the FHWA's 2024 National Bridge Inventory. Built in 1949, it carries 1 rated component 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 FL:740050
PRE-1950 · CONCRETE · LONG-SPAN-RUN · CULVERT-LED · ARTERIAL-ADT · STANDARD-LOAD · CAT-POOR
- PRE-1950 Pre-1950
- CONCRETE Concrete
- LONG-SPAN-RUN 4 spans
- CULVERT-LED Culvert-led
- 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.
Structural health score
A composite of the deck, superstructure, and substructure NBI condition ratings plus the inventory load rating, benchmarked against the full national bridge corpus, distinct from the Good/Fair/Poor category above.
Bridge Snapshot: CR 121
The CR 121 bridge in Nassau, Florida carries CR 121 over DEEP CREEK. It was built in 1949, making it 77 years old today. It was last reconstructed in 1988, extending its service life. The structure is built primarily of concrete and spans 4 sections, stretching 15.6 meters (51 feet) end to end. Daily traffic averages 2,400 vehicles, placing it in the moderately-trafficked tier of Florida bridges. It is owned and maintained by County Highway Agency.
The latest FHWA inspection places the weakest component in poor condition (see the full component ratings below). A component scored 4 or below, placing this bridge in the federal Poor condition category rather than declaring it unsafe or closed.
How CR 121 compares
Age against the county: built in 1949, earlier than 85 of Nassau's 104 bridges with a recorded construction year (82%), against a county median build year of 1973. Age is not a defect on its own, but it is the population from which future Poor ratings are drawn.
Live comparison across Florida bridges with a recorded inventory load rating (13,032 of 13,036 rated).
CR 121 vs every rated Florida bridge
Inventory load rating (metric tons), FHWA NBI, this state
24 Top 91% higher than 9% of 13,032 bridges
rated Florida 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.
Nassau inventory by recorded NBI category
Exclusive Good/Fair/Poor bands across all 104 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
- 1949
- Last Reconstructed
- 1988
- Material
- Concrete
- Number of Spans
- 4
- Structure Length
- 15.6 m (51 ft) 0
- Owner
- County Highway Agency
- Avg Daily Traffic
- 2,400 vehicles/day
- Structure Number
- 740050
Location
Data Source
FHWA National Bridge Inventory (NBI).
FHWA NBI Program ↗How to read this record
CR 121 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 CR 121 against other structures in Nassau and across Florida. Florida 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 CR 121?
CR 121 in Nassau, Florida on the FHWA's 0–9 scale.
How often is CR 121 inspected?
CR 121'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 2,400 vehicles per day.
What does “structurally deficient” mean in older bridge reports?
FHWA retired that reported status beginning with the 2018 archive. CR 121 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 CR 121?
CR 121 has an NBI inventory load rating of 23.5 metric tons.
Who is responsible for maintaining CR 121?
CR 121 is owned and maintained by County Highway Agency.
How old is CR 121 and does age affect safety?
CR 121 was built in 1949, making it 77 years old and last reconstructed in 1988.
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.