I-496 WB
Carrying I-496 WB over RED CEDAR RIVER & RAMP V
W LTS OF E LANSING, Ingham, Michigan
Inventory: FHWA NBI 2024 · last ETL August 2026
FHWA NBI record, refreshed with each annual release.
I-496 WB in Ingham, Michigan sits above 66% of rated Michigan bridges on inventory load rating (44 t), while its 1970 build year is earlier than 32% of Ingham's recorded-year cohort (241 bridges).
I-496 WB in Ingham, Michigan is rated Poor in the FHWA's 2024 National Bridge Inventory. Built in 1970, 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 MI:000000000003753
INTERSTATE-ERA · STEEL · LONG-SPAN-RUN · TIED-CTRL · HEAVY-ADT · HEAVY-LOAD · CAT-POOR
- INTERSTATE-ERA 1950–1979
- STEEL Steel
- LONG-SPAN-RUN 4 spans
- TIED-CTRL Tied control
- HEAVY-ADT Heavy ADT
- HEAVY-LOAD Heavy 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.
Bridge Snapshot: I-496 WB
The I-496 WB bridge in Ingham, Michigan carries I-496 WB over RED CEDAR RIVER & RAMP V. It was built in 1970, making it 56 years old today. It was last reconstructed in 1994, extending its service life. The structure is built primarily of steel and spans 4 sections, stretching 126.1 meters (414 feet) end to end. Daily traffic averages 34,831 vehicles, placing it in the heavily-trafficked tier of Michigan bridges. It is owned and maintained by State Highway Agency.
The latest FHWA inspection records show a deck rating of 6/9, superstructure at 4/9, substructure at 4/9. The weakest component sits in poor condition. At least one major component here scores 4 or below, which produces a Poor condition classification under FHWA's current reporting rules.
How I-496 WB compares
Age against the county: built in 1970, earlier than 76 of Ingham's 241 bridges with a recorded construction year (32%), against a county median build year of 1968. This is one of the newer structures in its county.
Live comparison across Michigan bridges with a recorded inventory load rating (11,366 of 11,371 rated).
I-496 WB vs every rated Michigan bridge
Inventory load rating (metric tons), FHWA NBI, this state
44 Top 34% higher than 66% of 11,366 bridges
rated Michigan 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.
Ingham inventory by recorded NBI category
Exclusive Good/Fair/Poor bands across all 241 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
- 1970
- Last Reconstructed
- 1994
- Material
- Steel
- Number of Spans
- 4
- Structure Length
- 126.1 m (414 ft)
- Deck Width
- 18.7 m (61 ft)
- Owner
- State Highway Agency
- Avg Daily Traffic
- 34,831 vehicles/day
- Structure Number
- 000000000003753
Condition Analysis
- • At 6/9, the deck (driving surface) shows fair condition, with minor wear flagged for upkeep.
- • The superstructure (beams and supports above the deck) rates poor at 4/9, with advanced deterioration recorded on the latest inspection.
- • The substructure (piers and abutments) rates poor at 4/9, with advanced deterioration recorded on the latest inspection.
Location
Data Source
FHWA National Bridge Inventory (NBI).
FHWA NBI Program ↗How to read this record
I-496 WB 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 I-496 WB against other structures in Ingham and across Michigan. Michigan 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 I-496 WB?
I-496 WB in Ingham, Michigan has a deck rating of 6/9, superstructure rating of 4/9, and substructure rating of 4/9 on the FHWA's 0–9 scale.
How often is I-496 WB inspected?
I-496 WB'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 34,831 vehicles per day.
What does “structurally deficient” mean in older bridge reports?
FHWA retired that reported status beginning with the 2018 archive. I-496 WB 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 I-496 WB?
I-496 WB has an NBI inventory load rating of 44.1 metric tons.
Who is responsible for maintaining I-496 WB?
I-496 WB is owned and maintained by State Highway Agency.
How old is I-496 WB and does age affect safety?
I-496 WB was built in 1970, making it 56 years old and last reconstructed in 1994.
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.