Miller Bluff Road
Carrying Miller Bluff Road over I10 SR8
5.5 Miles W. of County Ln, Santa Rosa, Florida
Inventory: FHWA NBI 2024 · last ETL August 2026
FHWA NBI record, refreshed with each annual release.
Miller Bluff Road in Santa Rosa, Florida sits above 96% of rated Florida bridges on inventory load rating (70 t), while its 1968 build year is earlier than 71% of Santa Rosa's recorded-year cohort (192 bridges).
Miller Bluff Road in Santa Rosa, Florida is rated Good in the FHWA's 2024 National Bridge Inventory. Built in 1968, it carries 3 rated components on the inspecting agency's 0-9 scale, and its weakest reported component scores 7. The lowest applicable rating sets the federal condition category, so this Good 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:580082
INTERSTATE-ERA · PRESTRESS · MULTI-SPAN · TIED-CTRL · LOCAL-ADT · HEAVY-LOAD · CAT-GOOD
- INTERSTATE-ERA 1950–1979
- PRESTRESS Prestressed concrete
- MULTI-SPAN 2 spans
- TIED-CTRL Tied control
- LOCAL-ADT Local ADT
- HEAVY-LOAD Heavy load
- CAT-GOOD Good
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: Miller Bluff Road
The Miller Bluff Road bridge in Santa Rosa, Florida carries Miller Bluff Road over I10 SR8. It was built in 1968, making it 58 years old today. The structure is built primarily of prestressed concrete and spans 2 sections, stretching 63.4 meters (208 feet) end to end. Daily traffic averages 105 vehicles, placing it in the lower-traffic tier of Florida bridges. It is owned and maintained by State Highway Agency.
The latest FHWA inspection records show a deck rating of 7/9, superstructure at 7/9, substructure at 7/9. The weakest component sits in good condition. None of this bridge's reported major components fall into the Poor condition range.
How Miller Bluff Road compares
Age against the county: built in 1968, earlier than 136 of Santa Rosa's 192 bridges with a recorded construction year (71%), against a county median build year of 1994. 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).
Miller Bluff Road vs every rated Florida bridge
Inventory load rating (metric tons), FHWA NBI, this state
70 Top 4% higher than 96% 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.
Santa Rosa inventory by recorded NBI category
Exclusive Good/Fair/Poor bands across all 192 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
- 1968
- Material
- Prestressed Concrete
- Number of Spans
- 2
- Structure Length
- 63.4 m (208 ft)
- Deck Width
- 9.0 m (30 ft)
- Owner
- State Highway Agency
- Avg Daily Traffic
- 105 vehicles/day
- Structure Number
- 580082
Condition Analysis
- • The deck (driving surface) is in good condition (7/9), showing no significant deterioration.
- • The superstructure (beams and supports above the deck) is in good condition (7/9), showing no significant deterioration.
- • The substructure (piers and abutments) rates good at 7/9, with no significant deterioration on file.
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 Miller Bluff 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 Miller Bluff Road against other structures in Santa Rosa 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 Miller Bluff Road?
Miller Bluff Road in Santa Rosa, Florida has a deck rating of 7/9, superstructure rating of 7/9, and substructure rating of 7/9 on the FHWA's 0–9 scale.
How often is Miller Bluff Road inspected?
Miller Bluff 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 105 vehicles per day.
What does “structurally deficient” mean in older bridge reports?
FHWA retired that reported status beginning with the 2018 archive. Miller Bluff Road is currently shown as Good condition from its component ratings; that category is not a live closure or safety decision.
What is the inventory load rating for Miller Bluff Road?
Miller Bluff Road has an NBI inventory load rating of 69.9 metric tons.
Who is responsible for maintaining Miller Bluff Road?
Miller Bluff Road is owned and maintained by State Highway Agency.
How old is Miller Bluff Road and does age affect safety?
Miller Bluff Road was built in 1968, making it 58 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.