West Sixth Avenue
Carrying West Sixth Avenue over Graves and Dennison Dtch
At Int of Alter & 6th, Broomfield, Colorado
Inventory: FHWA NBI 2024 · last ETL August 2026
FHWA NBI record, refreshed with each annual release.
West Sixth Avenue in Broomfield, Colorado sits above 42% of rated Colorado bridges on inventory load rating (33 t), while its 1985 build year is earlier than 92% of Broomfield's recorded-year cohort (66 bridges).
West Sixth Avenue in Broomfield, Colorado is rated Fair in the FHWA's 2024 National Bridge Inventory. Built in 1985, it carries 1 rated component on the inspecting agency's 0-9 scale, and its weakest reported component scores 6. 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:BFD-W.6TH-ALTER
LATE-CENTURY · CONCRETE · MULTI-SPAN · CULVERT-LED · ARTERIAL-ADT · STANDARD-LOAD · CAT-FAIR
- LATE-CENTURY 1980–1999
- CONCRETE Concrete
- MULTI-SPAN 2 spans
- CULVERT-LED Culvert-led
- ARTERIAL-ADT Arterial 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: West Sixth Avenue
The West Sixth Avenue bridge in Broomfield, Colorado carries West Sixth Avenue over Graves and Dennison Dtch. It was built in 1985, making it 41 years old today. The structure is built primarily of concrete and spans 2 sections, stretching 16.4 meters (54 feet) end to end. Daily traffic averages 3,667 vehicles, placing it in the moderately-trafficked tier of Colorado bridges. It is owned and maintained by City/Municipal Highway Agency.
The latest FHWA inspection records show culvert 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 West Sixth Avenue compares
Age against the county: built in 1985, earlier than 61 of Broomfield's 66 bridges with a recorded construction year (92%), against a county median build year of 2002. 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).
West Sixth Avenue vs every rated Colorado bridge
Inventory load rating (metric tons), FHWA NBI, this state
33 Top 58% higher than 42% 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.
Broomfield inventory by recorded NBI category
Exclusive Good/Fair/Poor bands across all 66 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
- 1985
- Material
- Concrete
- Number of Spans
- 2
- Structure Length
- 16.4 m (54 ft)
- Deck Width
- 18.7 m (61 ft)
- Owner
- City/Municipal Highway Agency
- Avg Daily Traffic
- 3,667 vehicles/day
- Structure Number
- BFD-W.6TH-ALTER
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 West Sixth Avenue 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 West Sixth Avenue against other structures in Broomfield 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 West Sixth Avenue?
West Sixth Avenue in Broomfield, Colorado on the FHWA's 0–9 scale.
How often is West Sixth Avenue inspected?
West Sixth Avenue'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 3,667 vehicles per day.
What does “structurally deficient” mean in older bridge reports?
FHWA retired that reported status beginning with the 2018 archive. West Sixth Avenue 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 West Sixth Avenue?
West Sixth Avenue has an NBI inventory load rating of 32.7 metric tons.
Who is responsible for maintaining West Sixth Avenue?
West Sixth Avenue is owned and maintained by City/Municipal Highway Agency.
How old is West Sixth Avenue and does age affect safety?
West Sixth Avenue was built in 1985, making it 41 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.