CR121A (MIDDLE RD)
Carrying CR121A (MIDDLE RD) over LITTLE ST. MARYS RIVER
0.6 MI NORTH OF CR 108, Nassau, Florida
Inventory: FHWA NBI 2024 · last ETL August 2026
FHWA NBI record, refreshed with each annual release.
CR121A (MIDDLE RD) in Nassau, Florida sits above 15% of rated Florida bridges on inventory load rating (27 t), while its 1969 build year is earlier than 53% of Nassau's recorded-year cohort (104 bridges).
CR121A (MIDDLE RD) in Nassau, Florida is rated Fair in the FHWA's 2024 National Bridge Inventory. Built in 1969, it carries 3 rated components on the inspecting agency's 0-9 scale, and its weakest reported component scores 5. The lowest applicable rating sets the federal condition category, so this Fair 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:740042
INTERSTATE-ERA · PRESTRESS · LONG-SPAN-RUN · SUB-LED · LOCAL-ADT · STANDARD-LOAD · CAT-FAIR
- INTERSTATE-ERA 1950–1979
- PRESTRESS Prestressed concrete
- LONG-SPAN-RUN 6 spans
- SUB-LED Substructure-led
- LOCAL-ADT Local ADT
- STANDARD-LOAD Standard load
- CAT-FAIR Fair
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: CR121A (MIDDLE RD)
The CR121A (MIDDLE RD) bridge in Nassau, Florida carries CR121A (MIDDLE RD) over LITTLE ST. MARYS RIVER. It was built in 1969, making it 57 years old today. The structure is built primarily of prestressed concrete and spans 6 sections, stretching 55.3 meters (181 feet) end to end. Daily traffic averages 450 vehicles, placing it in the lower-traffic tier of Florida bridges. It is owned and maintained by County Highway Agency.
The latest FHWA inspection places the weakest component in fair condition (see the full component ratings below). None of this bridge's reported major components fall into the Poor condition range.
How CR121A (MIDDLE RD) compares
Age against the county: built in 1969, earlier than 55 of Nassau's 104 bridges with a recorded construction year (53%), 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).
CR121A (MIDDLE RD) vs every rated Florida bridge
Inventory load rating (metric tons), FHWA NBI, this state
27 Top 85% higher than 15% 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.
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.
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
- 1969
- Material
- Prestressed Concrete
- Number of Spans
- 6
- Structure Length
- 55.3 m (181 ft)
- Deck Width
- 8.9 m (29 ft)
- Owner
- County Highway Agency
- Avg Daily Traffic
- 450 vehicles/day
- Structure Number
- 740042
Condition Analysis
- • The deck (driving surface) rates fair at 6/9, minor deterioration that routine maintenance should address.
- • The superstructure (beams and supports above the deck) is in fair condition (6/9), with minor deterioration that may require routine maintenance.
- • The substructure (piers and abutments) is in fair condition (5/9), with minor deterioration that may require routine maintenance.
Location
Data Source
FHWA National Bridge Inventory (NBI).
FHWA NBI Program ↗How to read this record
This page shows what the last federal inspection recorded, not whether CR121A (MIDDLE 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 CR121A (MIDDLE RD) 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 CR121A (MIDDLE RD)?
CR121A (MIDDLE RD) in Nassau, Florida has a deck rating of 6/9, superstructure rating of 6/9, and substructure rating of 5/9 on the FHWA's 0–9 scale.
How often is CR121A (MIDDLE RD) inspected?
CR121A (MIDDLE 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 450 vehicles per day.
What does “structurally deficient” mean in older bridge reports?
FHWA retired that reported status beginning with the 2018 archive. CR121A (MIDDLE RD) is currently shown as Fair condition from its component ratings; that category is not a live closure or safety decision.
What is the inventory load rating for CR121A (MIDDLE RD)?
CR121A (MIDDLE RD) has an NBI inventory load rating of 27.1 metric tons.
Who is responsible for maintaining CR121A (MIDDLE RD)?
CR121A (MIDDLE RD) is owned and maintained by County Highway Agency.
How old is CR121A (MIDDLE RD) and does age affect safety?
CR121A (MIDDLE RD) was built in 1969, making it 57 years old.
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.