Martin Mill Road
Carrying Martin Mill Road over Long Branch
0.7Mi W/o Beaver Crk Towr, Okaloosa, Florida
Inventory: FHWA NBI 2024 · last ETL August 2026
FHWA NBI record, refreshed with each annual release.
Martin Mill Road in Okaloosa, Florida sits above 6% of rated Florida bridges on inventory load rating (21 t), while its 1984 build year is earlier than 58% of Okaloosa's recorded-year cohort (218 bridges).
Martin Mill Road in Okaloosa, Florida is rated Fair in the FHWA's 2024 National Bridge Inventory. Built in 1984, 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:574071
LATE-CENTURY · TIMBER · MULTI-SPAN · DECK-LED · LOCAL-ADT · STANDARD-LOAD · CAT-FAIR
- LATE-CENTURY 1980–1999
- TIMBER Wood or timber
- MULTI-SPAN 3 spans
- DECK-LED Deck-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.
Bridge Snapshot: Martin Mill Road
The Martin Mill Road bridge in Okaloosa, Florida carries Martin Mill Road over Long Branch. It was built in 1984, making it 42 years old today. The structure is built primarily of wood or timber and spans 3 sections, stretching 10.1 meters (33 feet) end to end. Daily traffic averages 50 vehicles, placing it in the lower-traffic tier of Florida bridges. It is owned and maintained by State Park/Forest/Reservation.
The latest FHWA inspection records show a deck rating of 5/9, superstructure at 7/9, substructure at 6/9. The weakest component sits in fair condition. None of this bridge's reported major components fall into the Poor condition range.
How Martin Mill Road compares
Age against the county: built in 1984, earlier than 127 of Okaloosa's 218 bridges with a recorded construction year (58%), against a county median build year of 1993. 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).
Martin Mill Road vs every rated Florida bridge
Inventory load rating (metric tons), FHWA NBI, this state
21 Top 94% higher than 6% 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.
Okaloosa inventory by recorded NBI category
Exclusive Good/Fair/Poor bands across all 218 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
- 1984
- Material
- Wood or Timber
- Number of Spans
- 3
- Structure Length
- 10.1 m (33 ft)
- Deck Width
- 6.2 m (20 ft)
- Owner
- State Park/Forest/Reservation
- Avg Daily Traffic
- 50 vehicles/day
- Structure Number
- 574071
Condition Analysis
- • At 5/9, the deck (driving surface) shows fair condition, with minor wear flagged for upkeep.
- • 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.
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 Martin Mill Road 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 Martin Mill Road against other structures in Okaloosa 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 Martin Mill Road?
Martin Mill Road in Okaloosa, Florida has a deck rating of 5/9, superstructure rating of 7/9, and substructure rating of 6/9 on the FHWA's 0–9 scale.
How often is Martin Mill Road inspected?
Martin Mill Road'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 50 vehicles per day.
What does “structurally deficient” mean in older bridge reports?
FHWA retired that reported status beginning with the 2018 archive. Martin Mill Road 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 Martin Mill Road?
Martin Mill Road has an NBI inventory load rating of 21.2 metric tons.
Who is responsible for maintaining Martin Mill Road?
Martin Mill Road is owned and maintained by State Park/Forest/Reservation.
How old is Martin Mill Road and does age affect safety?
Martin Mill Road was built in 1984, making it 42 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.
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.