S. ROCK CITY ROAD
Carrying S. ROCK CITY ROAD over STREAM
.3 MI S GERMAN VALY, Stephenson, Illinois
Inventory: FHWA NBI 2024 · last ETL August 2026
FHWA NBI record, refreshed with each annual release.
S. ROCK CITY ROAD in Stephenson, Illinois sits above 21% of rated Illinois bridges on inventory load rating (31 t), while its 1931 build year is earlier than 95% of Stephenson's recorded-year cohort (342 bridges).
S. ROCK CITY ROAD in Stephenson, Illinois is rated Good in the FHWA's 2024 National Bridge Inventory. Built in 1931, it carries 1 rated component on the inspecting agency's 0-9 scale, and its weakest reported component scores 7. The lowest applicable rating sets the federal condition category, so this Good 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 IL:089500200000000
PRE-1950 · CONCRETE · MULTI-SPAN · CULVERT-LED · ARTERIAL-ADT · STANDARD-LOAD · CAT-GOOD
- PRE-1950 Pre-1950
- CONCRETE Concrete
- MULTI-SPAN 2 spans
- CULVERT-LED Culvert-led
- ARTERIAL-ADT Arterial ADT
- STANDARD-LOAD Standard load
- CAT-GOOD Good
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: S. ROCK CITY ROAD
The S. ROCK CITY ROAD bridge in Stephenson, Illinois carries S. ROCK CITY ROAD over STREAM. It was built in 1931, making it 95 years old today. It was last reconstructed in 1975, extending its service life. The structure is built primarily of concrete and spans 2 sections, stretching 8.0 meters (26 feet) end to end. Daily traffic averages 1,000 vehicles, placing it in the lower-traffic tier of Illinois bridges. It is owned and maintained by County Highway Agency.
The latest FHWA inspection records show culvert at 7/9. The weakest component sits in good condition. None of this bridge's reported major components fall into the Poor condition range.
How S. ROCK CITY ROAD compares
Age against the county: built in 1931, earlier than 324 of Stephenson's 342 bridges with a recorded construction year (95%), against a county median build year of 1981. Age is not a defect on its own, but it is the population from which future Poor ratings are drawn.
Live comparison across Illinois bridges with a recorded inventory load rating (26,904 of 26,928 rated).
S. ROCK CITY ROAD vs every rated Illinois bridge
Inventory load rating (metric tons), FHWA NBI, this state
31 Top 79% higher than 21% of 26,904 bridges
rated Illinois 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.
Stephenson inventory by recorded NBI category
Exclusive Good/Fair/Poor bands across all 342 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
- 1931
- Last Reconstructed
- 1975
- Material
- Concrete
- Number of Spans
- 2
- Structure Length
- 8.0 m (26 ft) 0
- Owner
- County Highway Agency
- Avg Daily Traffic
- 1,000 vehicles/day
- Structure Number
- 089500200000000
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 S. ROCK CITY ROAD 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 S. ROCK CITY ROAD against other structures in Stephenson 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 S. ROCK CITY ROAD?
S. ROCK CITY ROAD in Stephenson, Illinois on the FHWA's 0–9 scale.
How often is S. ROCK CITY ROAD inspected?
S. ROCK CITY ROAD'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 1,000 vehicles per day.
What does “structurally deficient” mean in older bridge reports?
FHWA retired that reported status beginning with the 2018 archive. S. ROCK CITY ROAD is currently shown as Good condition from its component ratings; that category is not a live closure or safety decision.
What is the inventory load rating for S. ROCK CITY ROAD?
S. ROCK CITY ROAD has an NBI inventory load rating of 30.5 metric tons.
Who is responsible for maintaining S. ROCK CITY ROAD?
S. ROCK CITY ROAD is owned and maintained by County Highway Agency.
How old is S. ROCK CITY ROAD and does age affect safety?
S. ROCK CITY ROAD was built in 1931, making it 95 years old and last reconstructed in 1975.
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.