Public Road
Carrying Public Road over Coal Creek
.25 M N of Jct US Hwy 287, Boulder, Colorado
Inventory: FHWA NBI 2024 · last ETL August 2026
FHWA NBI record, refreshed with each annual release.
Public Road in Boulder, Colorado sits above 37% of rated Colorado bridges on inventory load rating (31 t), while its 1927 build year is earlier than 98% of Boulder's recorded-year cohort (311 bridges).
Public Road in Boulder, Colorado is rated Fair in the FHWA's 2024 National Bridge Inventory. Built in 1927, 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 CO:LAF-PUBRD-003
PRE-1950 · CONCRETE · SINGLE-SPAN · SUPER-LED · HEAVY-ADT · STANDARD-LOAD · CAT-FAIR
- PRE-1950 Pre-1950
- CONCRETE Concrete
- SINGLE-SPAN Single span
- SUPER-LED Superstructure-led
- HEAVY-ADT Heavy 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: Public Road
The Public Road bridge in Boulder, Colorado carries Public Road over Coal Creek. It was built in 1927, making it 99 years old today. It was last reconstructed in 2000, extending its service life. The structure is built primarily of concrete and spans 1 section, stretching 14.0 meters (46 feet) end to end. Daily traffic averages 10,350 vehicles, placing it in the heavily-trafficked tier of Colorado bridges. It is owned and maintained by City/Municipal Highway Agency.
The latest FHWA inspection records show a deck rating of 6/9, superstructure at 5/9, substructure at 6/9. The weakest component sits in fair condition. All reported major components score above the Poor range.
How Public Road compares
Age against the county: built in 1927, earlier than 306 of Boulder's 311 bridges with a recorded construction year (98%), against a county median build year of 1990. Age is not a defect on its own, but it is the population from which future Poor ratings are drawn.
Live comparison across Colorado bridges with a recorded inventory load rating (8,962 of 8,965 rated).
Public Road vs every rated Colorado bridge
Inventory load rating (metric tons), FHWA NBI, this state
31 Top 63% higher than 37% of 8,962 bridges
rated Colorado 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.
Boulder inventory by recorded NBI category
Exclusive Good/Fair/Poor bands across all 311 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
- 1927
- Last Reconstructed
- 2000
- Material
- Concrete
- Number of Spans
- 1
- Structure Length
- 14.0 m (46 ft)
- Deck Width
- 14.7 m (48 ft)
- Owner
- City/Municipal Highway Agency
- Avg Daily Traffic
- 10,350 vehicles/day
- Structure Number
- LAF-PUBRD-003
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) rates fair at 5/9, minor deterioration that routine maintenance should address.
- • At 6/9, the substructure (piers and abutments) shows fair condition, with minor wear flagged for upkeep.
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 Public 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 Public Road against other structures in Boulder and across Colorado. Colorado 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 Public Road?
Public Road in Boulder, Colorado has a deck rating of 6/9, superstructure rating of 5/9, and substructure rating of 6/9 on the FHWA's 0–9 scale.
How often is Public Road inspected?
Public 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 10,350 vehicles per day.
What does “structurally deficient” mean in older bridge reports?
FHWA retired that reported status beginning with the 2018 archive. Public 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 Public Road?
Public Road has an NBI inventory load rating of 31.1 metric tons.
Who is responsible for maintaining Public Road?
Public Road is owned and maintained by City/Municipal Highway Agency.
How old is Public Road and does age affect safety?
Public Road was built in 1927, making it 99 years old and last reconstructed in 2000.
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.