HAPPY CANYON ROAD
Carrying HAPPY CANYON ROAD over I 25 ML
5.1 MI N CASTLE ROCK BUS., Douglas, Colorado
Inventory: FHWA NBI 2024 · last ETL August 2026
FHWA NBI record, refreshed with each annual release.
HAPPY CANYON ROAD in Douglas, Colorado sits above 14% of rated Colorado bridges on inventory load rating (23 t), while its 1965 build year is earlier than 95% of Douglas's recorded-year cohort (263 bridges).
HAPPY CANYON ROAD in Douglas, Colorado is rated Poor in the FHWA's 2024 National Bridge Inventory. Built in 1965, it carries 3 rated components on the inspecting agency's 0-9 scale, and its weakest reported component scores 4. The lowest applicable rating sets the federal condition category, so this Poor 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:G-17-AG
INTERSTATE-ERA · PRESTRESS · MULTI-SPAN · DECK-LED · ARTERIAL-ADT · STANDARD-LOAD · CAT-POOR
- INTERSTATE-ERA 1950–1979
- PRESTRESS Prestressed concrete
- MULTI-SPAN 2 spans
- DECK-LED Deck-led
- ARTERIAL-ADT Arterial ADT
- STANDARD-LOAD Standard load
- CAT-POOR Poor
Inspection-sheet codes from this record’s year, material family, spans, controlling component, ADT, inventory load, and NBI category, not a live closure verdict.
Structural health score
A composite of the deck, superstructure, and substructure NBI condition ratings plus the inventory load rating, benchmarked against the full national bridge corpus, distinct from the Good/Fair/Poor category above.
Bridge Snapshot: HAPPY CANYON ROAD
The HAPPY CANYON ROAD bridge in Douglas, Colorado carries HAPPY CANYON ROAD over I 25 ML. It was built in 1965, making it 61 years old today. The structure is built primarily of prestressed concrete and spans 2 sections, stretching 51.6 meters (169 feet) end to end. Daily traffic averages 5,917 vehicles, placing it in the moderately-trafficked tier of Colorado bridges. It is owned and maintained by State Highway Agency.
The latest FHWA inspection places the weakest component in poor condition (see the full component ratings below). At least one major component here scores 4 or below, which produces a Poor condition classification under FHWA's current reporting rules.
How HAPPY CANYON ROAD compares
Age against the county: built in 1965, earlier than 250 of Douglas's 263 bridges with a recorded construction year (95%), against a county median build year of 1996. 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).
HAPPY CANYON ROAD vs every rated Colorado bridge
Inventory load rating (metric tons), FHWA NBI, this state
23 Top 86% higher than 14% 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.
Douglas inventory by recorded NBI category
Exclusive Good/Fair/Poor bands across all 263 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
- 1965
- Material
- Prestressed Concrete
- Number of Spans
- 2
- Structure Length
- 51.6 m (169 ft)
- Deck Width
- 9.8 m (32 ft)
- Owner
- State Highway Agency
- Avg Daily Traffic
- 5,917 vehicles/day
- Structure Number
- G-17-AG
Condition Analysis
- • The deck (driving surface) is in poor condition (4/9), showing advanced deterioration on the inspecting agency's 0-9 scale.
- • At 6/9, the superstructure (beams and supports above the deck) shows fair condition, with minor wear flagged for upkeep.
- • The substructure (piers and abutments) rates fair at 5/9, minor deterioration that routine maintenance should address.
Location
Data Source
FHWA National Bridge Inventory (NBI).
FHWA NBI Program ↗How to read this record
HAPPY CANYON ROAD is in the federal Poor condition category. That is a component-based result, not a closure order.
- NBI condition ratings reflect the latest record in this annual dataset, not a live status. Current routine inspection intervals are risk-based.
- Understand what Poor condition does and does not mean before drawing conclusions. Poor condition explained
- Compare HAPPY CANYON ROAD against other structures in Douglas 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 HAPPY CANYON ROAD?
HAPPY CANYON ROAD in Douglas, Colorado has a deck rating of 4/9, superstructure rating of 6/9, and substructure rating of 5/9 on the FHWA's 0–9 scale.
How often is HAPPY CANYON ROAD inspected?
HAPPY CANYON 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 5,917 vehicles per day.
What does “structurally deficient” mean in older bridge reports?
FHWA retired that reported status beginning with the 2018 archive. HAPPY CANYON ROAD is currently shown as Poor condition from its component ratings; that category is not a live closure or safety decision.
What is the inventory load rating for HAPPY CANYON ROAD?
HAPPY CANYON ROAD has an NBI inventory load rating of 22.7 metric tons.
Who is responsible for maintaining HAPPY CANYON ROAD?
HAPPY CANYON ROAD is owned and maintained by State Highway Agency.
How old is HAPPY CANYON ROAD and does age affect safety?
HAPPY CANYON ROAD was built in 1965, making it 61 years old.
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.