MACKINAW TRAIL
Carrying MACKINAW TRAIL over WHITE PINE TRAIL
SECTION 14/23 T19N R10W, Osceola, Michigan
Inventory: FHWA NBI 2024 · last ETL August 2026
FHWA NBI record, refreshed with each annual release.
MACKINAW TRAIL in Osceola, Michigan sits above 97% of rated Michigan bridges on inventory load rating (97 t), while its 2003 build year is earlier than 17% of Osceola's recorded-year cohort (103 bridges).
MACKINAW TRAIL in Osceola, Michigan is rated Good in the FHWA's 2024 National Bridge Inventory. Built in 2003, it carries 1 rated component on the inspecting agency's 0-9 scale, and its weakest reported component scores 8. 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 MI:000000000008609
POST-2000 · STEEL · SINGLE-SPAN · CULVERT-LED · LOCAL-ADT · HEAVY-LOAD · CAT-GOOD
- POST-2000 2000+
- STEEL Steel
- SINGLE-SPAN Single span
- CULVERT-LED Culvert-led
- LOCAL-ADT Local ADT
- HEAVY-LOAD Heavy 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: MACKINAW TRAIL
The MACKINAW TRAIL bridge in Osceola, Michigan carries MACKINAW TRAIL over WHITE PINE TRAIL. It was built in 2003, making it 23 years old today. The structure is built primarily of steel and spans 1 section, stretching 7.5 meters (25 feet) end to end. Daily traffic averages 677 vehicles, placing it in the lower-traffic tier of Michigan bridges. It is owned and maintained by County Highway Agency.
The latest FHWA inspection records show culvert at 8/9. The weakest component sits in good condition. No reported major component scores in the Poor range under the current federal condition thresholds.
How MACKINAW TRAIL compares
Age against the county: built in 2003, earlier than 17 of Osceola's 103 bridges with a recorded construction year (17%), against a county median build year of 1985. 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).
MACKINAW TRAIL vs every rated Michigan bridge
Inventory load rating (metric tons), FHWA NBI, this state
97 Top 3% higher than 97% 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.
Osceola inventory by recorded NBI category
Exclusive Good/Fair/Poor bands across all 103 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
- 2003
- Material
- Steel
- Number of Spans
- 1
- Structure Length
- 7.5 m (25 ft) 0
- Owner
- County Highway Agency
- Avg Daily Traffic
- 677 vehicles/day
- Structure Number
- 000000000008609
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 MACKINAW TRAIL 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 MACKINAW TRAIL against other structures in Osceola 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 MACKINAW TRAIL?
MACKINAW TRAIL in Osceola, Michigan on the FHWA's 0–9 scale.
How often is MACKINAW TRAIL inspected?
MACKINAW TRAIL'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 677 vehicles per day.
What does “structurally deficient” mean in older bridge reports?
FHWA retired that reported status beginning with the 2018 archive. MACKINAW TRAIL 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 MACKINAW TRAIL?
MACKINAW TRAIL has an NBI inventory load rating of 97.2 metric tons.
Who is responsible for maintaining MACKINAW TRAIL?
MACKINAW TRAIL is owned and maintained by County Highway Agency.
How old is MACKINAW TRAIL and does age affect safety?
MACKINAW TRAIL was built in 2003, making it 23 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.
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.