IRR# COUNTY RD 307
Carrying IRR# COUNTY RD 307 over FLORIDA RIVER
2.6 MI SW OF LA PLATA APT, La Plata, Colorado
Inventory: FHWA NBI 2024 · last ETL August 2026
FHWA NBI record, refreshed with each annual release.
IRR# COUNTY RD 307 in La Plata, Colorado sits above 73% of rated Colorado bridges on inventory load rating (40 t), while its 1989 build year is earlier than 48% of La Plata's recorded-year cohort (102 bridges).
IRR# COUNTY RD 307 in La Plata, Colorado is rated Fair in the FHWA's 2024 National Bridge Inventory. Built in 1989, 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:067030705.1035A
LATE-CENTURY · PRESTRESS · SINGLE-SPAN · TIED-CTRL · LOCAL-ADT · STANDARD-LOAD · CAT-FAIR
- LATE-CENTURY 1980–1999
- PRESTRESS Prestressed concrete
- SINGLE-SPAN Single span
- TIED-CTRL Tied control
- LOCAL-ADT Local 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: IRR# COUNTY RD 307
The IRR# COUNTY RD 307 bridge in La Plata, Colorado carries IRR# COUNTY RD 307 over FLORIDA RIVER. It was built in 1989, making it 37 years old today. The structure is built primarily of prestressed concrete and spans 1 section, stretching 22.0 meters (72 feet) end to end. Daily traffic averages 130 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 a deck rating of 6/9, superstructure at 6/9, substructure at 7/9. The weakest component sits in fair condition. None of this bridge's reported major components fall into the Poor condition range.
How IRR# COUNTY RD 307 compares
Age against the county: built in 1989, earlier than 49 of La Plata's 102 bridges with a recorded construction year (48%), against a county median build year of 1989.
Live comparison across Colorado bridges with a recorded inventory load rating (8,962 of 8,965 rated).
IRR# COUNTY RD 307 vs every rated Colorado bridge
Inventory load rating (metric tons), FHWA NBI, this state
40 Top 27% higher than 73% 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.
La Plata inventory by recorded NBI category
Exclusive Good/Fair/Poor bands across all 102 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
- Prestressed Concrete
- Number of Spans
- 1
- Structure Length
- 22.0 m (72 ft)
- Deck Width
- 8.5 m (28 ft)
- Owner
- County Highway Agency
- Avg Daily Traffic
- 130 vehicles/day
- Structure Number
- 067030705.1035A
Condition Analysis
- • The deck (driving surface) rates fair at 6/9, minor deterioration that routine maintenance should address.
- • The superstructure (beams and supports above the deck) is in fair condition (6/9), with minor deterioration that may require routine maintenance.
- • The substructure (piers and abutments) rates good at 7/9, with no significant deterioration on file.
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 IRR# COUNTY RD 307 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 IRR# COUNTY RD 307 against other structures in La Plata 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 IRR# COUNTY RD 307?
IRR# COUNTY RD 307 in La Plata, Colorado has a deck rating of 6/9, superstructure rating of 6/9, and substructure rating of 7/9 on the FHWA's 0–9 scale.
How often is IRR# COUNTY RD 307 inspected?
IRR# COUNTY RD 307'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 130 vehicles per day.
What does “structurally deficient” mean in older bridge reports?
FHWA retired that reported status beginning with the 2018 archive. IRR# COUNTY RD 307 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 IRR# COUNTY RD 307?
IRR# COUNTY RD 307 has an NBI inventory load rating of 39.7 metric tons.
Who is responsible for maintaining IRR# COUNTY RD 307?
IRR# COUNTY RD 307 is owned and maintained by County Highway Agency.
How old is IRR# COUNTY RD 307 and does age affect safety?
IRR# COUNTY RD 307 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.