I25 ML+FRONTAGE RD
Carrying I25 ML+FRONTAGE RD over WINDSOR RES CANAL
0.4 MI N OF JCT SH1, Larimer, Colorado
Inventory: FHWA NBI 2024 · last ETL August 2026
FHWA NBI record, refreshed with each annual release.
I25 ML+FRONTAGE RD in Larimer, Colorado sits above 97% of rated Colorado bridges on inventory load rating (100 t), while its 1989 build year is earlier than 47% of Larimer's recorded-year cohort (559 bridges).
I25 ML+FRONTAGE RD in Larimer, Colorado is rated Fair in the FHWA's 2024 National Bridge Inventory. Built in 1989, 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:B-17-DR
LATE-CENTURY · CONCRETE · SINGLE-SPAN · CULVERT-LED · HEAVY-ADT · HEAVY-LOAD · CAT-FAIR
- LATE-CENTURY 1980–1999
- CONCRETE Concrete
- SINGLE-SPAN Single span
- CULVERT-LED Culvert-led
- HEAVY-ADT Heavy ADT
- HEAVY-LOAD Heavy 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: I25 ML+FRONTAGE RD
The I25 ML+FRONTAGE RD bridge in Larimer, Colorado carries I25 ML+FRONTAGE RD over WINDSOR RES CANAL. It was built in 1989, making it 37 years old today. The structure is built primarily of concrete and spans 1 section, stretching 6.1 meters (20 feet) end to end. Daily traffic averages 25,000 vehicles, placing it in the heavily-trafficked tier of Colorado bridges. It is owned and maintained by State Highway Agency.
The latest FHWA inspection 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 I25 ML+FRONTAGE RD compares
Age against the county: built in 1989, earlier than 263 of Larimer's 559 bridges with a recorded construction year (47%), against a county median build year of 1988. This is one of the newer structures in its county.
Live comparison across Colorado bridges with a recorded inventory load rating (8,962 of 8,965 rated).
I25 ML+FRONTAGE RD vs every rated Colorado bridge
Inventory load rating (metric tons), FHWA NBI, this state
100 Top 3% higher than 97% 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.
Larimer inventory by recorded NBI category
Exclusive Good/Fair/Poor bands across all 559 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
- 1989
- Material
- Concrete
- Number of Spans
- 1
- Structure Length
- 6.1 m (20 ft)
- Deck Width
- 85.3 m (280 ft)
- Owner
- State Highway Agency
- Avg Daily Traffic
- 25,000 vehicles/day
- Structure Number
- B-17-DR
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 I25 ML+FRONTAGE RD 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 I25 ML+FRONTAGE RD against other structures in Larimer 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 I25 ML+FRONTAGE RD?
I25 ML+FRONTAGE RD in Larimer, Colorado on the FHWA's 0–9 scale.
How often is I25 ML+FRONTAGE RD inspected?
I25 ML+FRONTAGE RD'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 25,000 vehicles per day.
What does “structurally deficient” mean in older bridge reports?
FHWA retired that reported status beginning with the 2018 archive. I25 ML+FRONTAGE RD 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 I25 ML+FRONTAGE RD?
I25 ML+FRONTAGE RD has an NBI inventory load rating of 99.9 metric tons.
Who is responsible for maintaining I25 ML+FRONTAGE RD?
I25 ML+FRONTAGE RD is owned and maintained by State Highway Agency.
How old is I25 ML+FRONTAGE RD and does age affect safety?
I25 ML+FRONTAGE RD was built in 1989, making it 37 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.