Co Rd 4 Mile Lane
Carrying Co Rd 4 Mile Lane over Hooper Lateral
.6 Mi E of CR 102, Alamosa, Colorado
Inventory: FHWA NBI 2024 · last ETL August 2026
FHWA NBI record, refreshed with each annual release.
Co Rd 4 Mile Lane in Alamosa, Colorado sits above 58% of rated Colorado bridges on inventory load rating (34 t), while its 2021 build year is earlier than 0% of Alamosa's recorded-year cohort (16 bridges).
Co Rd 4 Mile Lane in Alamosa, Colorado is rated Fair in the FHWA's 2024 National Bridge Inventory. Built in 2021, 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:003000403.5012A
POST-2000 · STEEL · MULTI-SPAN · CULVERT-LED · TRACE-ADT · STANDARD-LOAD · CAT-FAIR
- POST-2000 2000+
- STEEL Steel
- MULTI-SPAN 3 spans
- CULVERT-LED Culvert-led
- TRACE-ADT Trace 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: Co Rd 4 Mile Lane
The Co Rd 4 Mile Lane bridge in Alamosa, Colorado carries Co Rd 4 Mile Lane over Hooper Lateral. It was built in 2021, making it 5 years old today. The structure is built primarily of steel and spans 3 sections, stretching 6.2 meters (20 feet) end to end. Daily traffic averages 41 vehicles, placing it in the lower-traffic tier of Colorado bridges. It is owned and maintained by County Highway Agency.
The latest FHWA inspection records show culvert at 6/9. The weakest component sits in fair condition. All reported major components score above the Poor range.
How Co Rd 4 Mile Lane compares
Age against the county: built in 2021, earlier than 0 of Alamosa's 16 bridges with a recorded construction year (0%), against a county median build year of 1990. 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).
Co Rd 4 Mile Lane vs every rated Colorado bridge
Inventory load rating (metric tons), FHWA NBI, this state
34 Top 42% higher than 58% 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.
Alamosa inventory by recorded NBI category
Exclusive Good/Fair/Poor bands across all 16 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
- 2021
- Material
- Steel
- Number of Spans
- 3
- Structure Length
- 6.2 m (20 ft)
- Deck Width
- 15.6 m (51 ft)
- Owner
- County Highway Agency
- Avg Daily Traffic
- 41 vehicles/day
- Structure Number
- 003000403.5012A
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 Co Rd 4 Mile Lane 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 Co Rd 4 Mile Lane against other structures in Alamosa 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 Co Rd 4 Mile Lane?
Co Rd 4 Mile Lane in Alamosa, Colorado on the FHWA's 0–9 scale.
How often is Co Rd 4 Mile Lane inspected?
Co Rd 4 Mile Lane'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 41 vehicles per day.
What does “structurally deficient” mean in older bridge reports?
FHWA retired that reported status beginning with the 2018 archive. Co Rd 4 Mile Lane 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 Co Rd 4 Mile Lane?
Co Rd 4 Mile Lane has an NBI inventory load rating of 34.3 metric tons.
Who is responsible for maintaining Co Rd 4 Mile Lane?
Co Rd 4 Mile Lane is owned and maintained by County Highway Agency.
How old is Co Rd 4 Mile Lane and does age affect safety?
Co Rd 4 Mile Lane was built in 2021, making it 5 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.