Duck Key Drive
Carrying Duck Key Drive over Duck Key Channel
0.5 Mile E of US1 MM 61.1, Monroe, Florida
Data updated May 2026
FHWA NBI record, refreshed with each annual release.
Bridge Snapshot: Duck Key Drive
The Duck Key Drive bridge in Monroe, Florida carries Duck Key Drive over Duck Key Channel. It was built in 1955, making it 71 years old today. It was last reconstructed in 1982, extending its service life. The structure is built primarily of concrete and spans 3 sections, stretching 23.5 meters (77 feet) end to end. Daily traffic averages 830 vehicles, placing it in the lower-traffic tier of Florida bridges. It is owned and maintained by County Highway Agency.
The latest FHWA inspection records show superstructure at 7/9, substructure at 6/9. The weakest component sits in fair condition. No reported major component scores in the Poor range under the current federal condition thresholds. Its NBI inventory load rating is 27.6 metric tons.
Sourced from the FHWA National Bridge Inventory. See our methodology for refresh cadence and NBI release vintage.
How Duck Key Drive compares
Live comparison across Florida.
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 How the historical reference is calculated.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
- 1955
- Last Reconstructed
- 1982
- Material
- Concrete
- Number of Spans
- 3
- Structure Length
- 23.5 m (77 ft)
- Deck Width
- 8.0 m (26 ft)
- Owner
- County Highway Agency
- Avg Daily Traffic
- 830 vehicles/day
- Structure Number
- 904602
Location
Data Source
FHWA National Bridge Inventory (NBI).
FHWA NBI Program ↗Condition Analysis
- • The superstructure (beams and supports above the deck) rates good at 7/9, with no significant deterioration on file.
- • The substructure (piers and abutments) rates fair at 6/9, minor deterioration that routine maintenance should address.
How to read this record
This page shows what the last federal inspection recorded, not whether Duck Key Drive 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 Duck Key Drive against other structures in Monroe 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 Duck Key Drive?
Duck Key Drive in Monroe, Florida, superstructure rating of 7/9, and substructure rating of 6/9 on the FHWA's 0–9 scale.
How often is Duck Key Drive inspected?
Duck Key Drive'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 830 vehicles per day.
What does “structurally deficient” mean in older bridge reports?
FHWA retired that reported status beginning with the 2018 archive. Duck Key Drive 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 Duck Key Drive?
Duck Key Drive has an NBI inventory load rating of 27.6 metric tons.
Who is responsible for maintaining Duck Key Drive?
Duck Key Drive is owned and maintained by County Highway Agency.
How old is Duck Key Drive and does age affect safety?
Duck Key Drive was built in 1955, making it 71 years old and last reconstructed in 1982.
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.