FAU-3818 Mack Road
Carrying FAU-3818 Mack Road over W Br DuPage River
0.2 MI E IL 59, DuPage, Illinois
Inventory: FHWA NBI 2024 · last ETL August 2026
FHWA NBI record, refreshed with each annual release.
FAU-3818 Mack Road in DuPage, Illinois sits above 1% of rated Illinois bridges on inventory load rating (5 t), while its 1954 build year is earlier than 94% of DuPage's recorded-year cohort (344 bridges).
FAU-3818 Mack Road in DuPage, Illinois is rated Poor in the FHWA's 2024 National Bridge Inventory. Built in 1954, it carries 3 rated components on the inspecting agency's 0-9 scale, and its weakest reported component scores 4. The lowest applicable rating sets the federal condition category, so this Poor 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:022302700000000
INTERSTATE-ERA · PRESTRESS · LONG-SPAN-RUN · TIED-CTRL · ARTERIAL-ADT · LIGHT-LOAD · CAT-POOR
- INTERSTATE-ERA 1950–1979
- PRESTRESS Prestressed concrete
- LONG-SPAN-RUN 4 spans
- TIED-CTRL Tied control
- ARTERIAL-ADT Arterial ADT
- LIGHT-LOAD Light load
- CAT-POOR Poor
Inspection-sheet codes from this record’s year, material family, spans, controlling component, ADT, inventory load, and NBI category, not a live closure verdict.
Structural health score
A composite of the deck, superstructure, and substructure NBI condition ratings plus the inventory load rating, benchmarked against the full national bridge corpus, distinct from the Good/Fair/Poor category above.
Bridge Snapshot: FAU-3818 Mack Road
The FAU-3818 Mack Road bridge in DuPage, Illinois carries FAU-3818 Mack Road over W Br DuPage River. It was built in 1954, making it 72 years old today. It was last reconstructed in 1979, extending its service life. The structure is built primarily of prestressed concrete and spans 4 sections, stretching 36.1 meters (118 feet) end to end. Daily traffic averages 2,200 vehicles, placing it in the moderately-trafficked tier of Illinois bridges. It is owned and maintained by City/Municipal Highway Agency.
The latest FHWA inspection places the weakest component in poor condition (see the full component ratings below). A component scored 4 or below, placing this bridge in the federal Poor condition category rather than declaring it unsafe or closed.
How FAU-3818 Mack Road compares
Age against the county: built in 1954, earlier than 322 of DuPage's 344 bridges with a recorded construction year (94%), against a county median build year of 1988. 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).
FAU-3818 Mack Road vs every rated Illinois bridge
Inventory load rating (metric tons), FHWA NBI, this state
5 Top 99% higher than 1% 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.
DuPage inventory by recorded NBI category
Exclusive Good/Fair/Poor bands across all 344 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
- 1954
- Last Reconstructed
- 1979
- Material
- Prestressed Concrete
- Number of Spans
- 4
- Structure Length
- 36.1 m (118 ft)
- Deck Width
- 11.0 m (36 ft)
- Owner
- City/Municipal Highway Agency
- Avg Daily Traffic
- 2,200 vehicles/day
- Structure Number
- 022302700000000
Condition Analysis
- • The deck (driving surface) is in poor condition (4/9), showing advanced deterioration on the inspecting agency's 0-9 scale.
- • The superstructure (beams and supports above the deck) is in poor condition (4/9), showing advanced deterioration on the inspecting agency's 0-9 scale.
- • At 4/9, the substructure (piers and abutments) is in poor shape, with advanced wear on file for this vintage.
Location
Data Source
FHWA National Bridge Inventory (NBI).
FHWA NBI Program ↗How to read this record
FAU-3818 Mack Road is in the federal Poor condition category. That is a component-based result, not a closure order.
- NBI condition ratings reflect the latest record in this annual dataset, not a live status. Current routine inspection intervals are risk-based.
- Understand what Poor condition does and does not mean before drawing conclusions. Poor condition explained
- Compare FAU-3818 Mack Road against other structures in DuPage 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 FAU-3818 Mack Road?
FAU-3818 Mack Road in DuPage, Illinois has a deck rating of 4/9, superstructure rating of 4/9, and substructure rating of 4/9 on the FHWA's 0–9 scale.
How often is FAU-3818 Mack Road inspected?
FAU-3818 Mack 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 2,200 vehicles per day.
What does “structurally deficient” mean in older bridge reports?
FHWA retired that reported status beginning with the 2018 archive. FAU-3818 Mack Road is currently shown as Poor condition from its component ratings; that category is not a live closure or safety decision.
What is the inventory load rating for FAU-3818 Mack Road?
FAU-3818 Mack Road has an NBI inventory load rating of 4.5 metric tons.
Who is responsible for maintaining FAU-3818 Mack Road?
FAU-3818 Mack Road is owned and maintained by City/Municipal Highway Agency.
How old is FAU-3818 Mack Road and does age affect safety?
FAU-3818 Mack Road was built in 1954, making it 72 years old and last reconstructed in 1979.
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.