CH 4 (FAS 537)
Carrying CH 4 (FAS 537) over TRENKLE SLOUGH
.8 MI S FARMER CITY, De Witt, Illinois
Inventory: FHWA NBI 2024 · last ETL August 2026
FHWA NBI record, refreshed with each annual release.
CH 4 (FAS 537) in De Witt, Illinois sits above 7% of rated Illinois bridges on inventory load rating (22 t), while its 1968 build year is earlier than 83% of De Witt's recorded-year cohort (192 bridges).
CH 4 (FAS 537) in De Witt, Illinois is rated Fair in the FHWA's 2024 National Bridge Inventory. Built in 1968, it carries 3 rated components on the inspecting agency's 0-9 scale, and its weakest reported component scores 5. 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 IL:020300200000000
INTERSTATE-ERA · PRESTRESS · MULTI-SPAN · TIED-CTRL · ARTERIAL-ADT · STANDARD-LOAD · CAT-FAIR
- INTERSTATE-ERA 1950–1979
- PRESTRESS Prestressed concrete
- MULTI-SPAN 3 spans
- TIED-CTRL Tied control
- ARTERIAL-ADT Arterial 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: CH 4 (FAS 537)
The CH 4 (FAS 537) bridge in De Witt, Illinois carries CH 4 (FAS 537) over TRENKLE SLOUGH. It was built in 1968, making it 58 years old today. The structure is built primarily of prestressed concrete and spans 3 sections, stretching 39.4 meters (129 feet) end to end. Daily traffic averages 1,200 vehicles, placing it in the moderately-trafficked tier of Illinois bridges. It is owned and maintained by County Highway Agency.
The latest FHWA inspection records show a deck rating of 5/9, superstructure at 5/9, substructure at 5/9. The weakest component sits in fair condition. No reported major component scores in the Poor range under the current federal condition thresholds.
How CH 4 (FAS 537) compares
Age against the county: built in 1968, earlier than 159 of De Witt's 192 bridges with a recorded construction year (83%), 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).
CH 4 (FAS 537) vs every rated Illinois bridge
Inventory load rating (metric tons), FHWA NBI, this state
22 Top 93% higher than 7% 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.
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.
De Witt inventory by recorded NBI category
Exclusive Good/Fair/Poor bands across all 192 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
- 1968
- Material
- Prestressed Concrete
- Number of Spans
- 3
- Structure Length
- 39.4 m (129 ft)
- Deck Width
- 8.5 m (28 ft)
- Owner
- County Highway Agency
- Avg Daily Traffic
- 1,200 vehicles/day
- Structure Number
- 020300200000000
Condition Analysis
- • At 5/9, the deck (driving surface) shows fair condition, with minor wear flagged for upkeep.
- • The superstructure (beams and supports above the deck) rates fair at 5/9, minor deterioration that routine maintenance should address.
- • The substructure (piers and abutments) is in fair condition (5/9), with minor deterioration that may require routine maintenance.
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 CH 4 (FAS 537) 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 CH 4 (FAS 537) against other structures in De Witt 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 CH 4 (FAS 537)?
CH 4 (FAS 537) in De Witt, Illinois has a deck rating of 5/9, superstructure rating of 5/9, and substructure rating of 5/9 on the FHWA's 0–9 scale.
How often is CH 4 (FAS 537) inspected?
CH 4 (FAS 537)'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 1,200 vehicles per day.
What does “structurally deficient” mean in older bridge reports?
FHWA retired that reported status beginning with the 2018 archive. CH 4 (FAS 537) 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 CH 4 (FAS 537)?
CH 4 (FAS 537) has an NBI inventory load rating of 22.0 metric tons.
Who is responsible for maintaining CH 4 (FAS 537)?
CH 4 (FAS 537) is owned and maintained by County Highway Agency.
How old is CH 4 (FAS 537) and does age affect safety?
CH 4 (FAS 537) was built in 1968, making it 58 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.
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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.