I25NB RAMP TO C470
Carrying I25NB RAMP TO C470 over I 25 SH 470 ML RAMPS R
TOP FLYOVER JCT I-25 &am, Douglas, Colorado
Inventory: FHWA NBI 2024 · last ETL August 2026
FHWA NBI record, refreshed with each annual release.
I25NB RAMP TO C470 in Douglas, Colorado sits above 2% of rated Colorado bridges on inventory load rating (12 t), while its 1985 build year is earlier than 74% of Douglas's recorded-year cohort (263 bridges).
I25NB RAMP TO C470 in Douglas, Colorado is rated Fair in the FHWA's 2024 National Bridge Inventory. Built in 1985, it carries 3 rated components 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:F-17-IQ
LATE-CENTURY · STEEL · LONG-SPAN-RUN · TIED-CTRL · HEAVY-ADT · LIGHT-LOAD · CAT-FAIR
- LATE-CENTURY 1980–1999
- STEEL Steel
- LONG-SPAN-RUN 6 spans
- TIED-CTRL Tied control
- HEAVY-ADT Heavy ADT
- LIGHT-LOAD Light 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.
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: I25NB RAMP TO C470
The I25NB RAMP TO C470 bridge in Douglas, Colorado carries I25NB RAMP TO C470 over I 25 SH 470 ML RAMPS R. It was built in 1985, making it 41 years old today. The structure is built primarily of steel continuous and spans 6 sections, stretching 238.2 meters (782 feet) end to end. Daily traffic averages 47,000 vehicles, placing it in the heavily-trafficked tier of Colorado bridges. It is owned and maintained by State Highway Agency.
The latest FHWA inspection places the weakest component in fair condition (see the full component ratings below). All reported major components score above the Poor range.
How I25NB RAMP TO C470 compares
Age against the county: built in 1985, earlier than 195 of Douglas's 263 bridges with a recorded construction year (74%), 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).
I25NB RAMP TO C470 vs every rated Colorado bridge
Inventory load rating (metric tons), FHWA NBI, this state
12 Top 98% higher than 2% 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
- 1985
- Material
- Steel Continuous
- Number of Spans
- 6
- Structure Length
- 238.2 m (782 ft)
- Deck Width
- 9.3 m (31 ft)
- Owner
- State Highway Agency
- Avg Daily Traffic
- 47,000 vehicles/day
- Structure Number
- F-17-IQ
Condition Analysis
- • At 6/9, 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 I25NB RAMP TO C470 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 I25NB RAMP TO C470 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 I25NB RAMP TO C470?
I25NB RAMP TO C470 in Douglas, Colorado has a deck rating of 6/9, superstructure rating of 7/9, and substructure rating of 6/9 on the FHWA's 0–9 scale.
How often is I25NB RAMP TO C470 inspected?
I25NB RAMP TO C470'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 47,000 vehicles per day.
What does “structurally deficient” mean in older bridge reports?
FHWA retired that reported status beginning with the 2018 archive. I25NB RAMP TO C470 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 I25NB RAMP TO C470?
I25NB RAMP TO C470 has an NBI inventory load rating of 12.3 metric tons.
Who is responsible for maintaining I25NB RAMP TO C470?
I25NB RAMP TO C470 is owned and maintained by State Highway Agency.
How old is I25NB RAMP TO C470 and does age affect safety?
I25NB RAMP TO C470 was built in 1985, making it 41 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.