Garden Prairie Roa
Carrying Garden Prairie Roa over I-90
1 Mi W. of Co. Line, Boone, Illinois
Data updated May 2026
FHWA NBI record, refreshed with each annual release.
Bridge Snapshot: Garden Prairie Roa
The Garden Prairie Roa bridge in Boone, Illinois carries Garden Prairie Roa over I-90. It was built in 2015, making it 11 years old today. The structure is built primarily of prestressed concrete continuous. Daily traffic averages 54,300 vehicles, placing it in the heavily-trafficked tier of Illinois bridges.
The latest FHWA inspection records show limited component ratings on file. The weakest component sits in unrated condition. None of this bridge's reported major components fall into the Poor condition range.
Sourced from the FHWA National Bridge Inventory. See our methodology for refresh cadence and NBI release vintage.
How Garden Prairie Roa compares
Live comparison across Illinois.
Historical Sufficiency Rating
PlainBridge-computedFHWA discontinued this calculated item; it does not determine current condition, funding eligibility, posting, or closure. How the historical reference is calculated.
Condition Ratings
Full 0–9 scale + sufficiency-rating breakdown: how condition ratings work.
Structural Details
- Year Built
- 2015
- Material
- Prestressed Concrete Continuous
- Avg Daily Traffic
- 54,300 vehicles/day
- Structure Number
- 004999300000000
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 Garden Prairie Roa 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 Garden Prairie Roa against other structures in Boone and across Illinois. Illinois 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 Garden Prairie Roa?
Garden Prairie Roa in Boone, Illinois on the FHWA's 0–9 scale.
How often is Garden Prairie Roa inspected?
Garden Prairie Roa'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 54,300 vehicles per day.
What does “structurally deficient” mean in older bridge reports?
FHWA retired that reported status beginning with the 2018 archive. Garden Prairie Roa is currently shown as unrated condition from its component ratings; that category is not a live closure or safety decision.
What is the inventory load rating for Garden Prairie Roa?
An inventory load rating is not recorded for Garden Prairie Roa.
Who is responsible for maintaining Garden Prairie Roa?
Ownership is not specified for Garden Prairie Roa in the NBI.
How old is Garden Prairie Roa and does age affect safety?
Garden Prairie Roa was built in 2015, making it 11 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.
Every figure on PlainBridge is rendered directly from federal source data, no number is typed in by an editor. This page draws directly on federal source data, no figure is typed in by an editor. See our editorial standards & corrections policy, the methodology behind these numbers, or report a data error.