SHEPHERD RD
Carrying SHEPHERD RD over SHARPS CREEK
50 FT N OF VERNON RD, Isabella, Michigan
Inventory: FHWA NBI 2024 · last ETL August 2026
FHWA NBI record, refreshed with each annual release.
SHEPHERD RD in Isabella, Michigan sits above 2% of rated Michigan bridges on inventory load rating (12 t), while its 1969 build year is earlier than 65% of Isabella's recorded-year cohort (183 bridges).
SHEPHERD RD in Isabella, Michigan is rated Poor in the FHWA's 2024 National Bridge Inventory. Built in 1969, it carries 1 rated component 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:000000000014402
INTERSTATE-ERA · STEEL · MULTI-SPAN · CULVERT-LED · LOCAL-ADT · LIGHT-LOAD · CAT-POOR
- INTERSTATE-ERA 1950–1979
- STEEL Steel
- MULTI-SPAN 3 spans
- CULVERT-LED Culvert-led
- LOCAL-ADT Local 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.
Bridge Snapshot: SHEPHERD RD
The SHEPHERD RD bridge in Isabella, Michigan carries SHEPHERD RD over SHARPS CREEK. It was built in 1969, making it 57 years old today. The structure is built primarily of steel and spans 3 sections, stretching 6.7 meters (22 feet) end to end. Daily traffic averages 85 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 4/9. The weakest component sits in poor condition. Because at least one major component scores 4 or lower, this bridge falls in FHWA's Poor condition category. That category is not a closure order.
How SHEPHERD RD compares
Age against the county: built in 1969, earlier than 119 of Isabella's 183 bridges with a recorded construction year (65%), against a county median build year of 1980. Age is not a defect on its own, but it is the population from which future Poor ratings are drawn.
Live comparison across Michigan bridges with a recorded inventory load rating (11,366 of 11,371 rated).
SHEPHERD RD vs every rated Michigan bridge
Inventory load rating (metric tons), FHWA NBI, this state
12 Top 98% higher than 2% 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.
Isabella inventory by recorded NBI category
Exclusive Good/Fair/Poor bands across all 183 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
- 1969
- Material
- Steel
- Number of Spans
- 3
- Structure Length
- 6.7 m (22 ft) 0
- Owner
- County Highway Agency
- Avg Daily Traffic
- 85 vehicles/day
- Structure Number
- 000000000014402
Location
Data Source
FHWA National Bridge Inventory (NBI).
FHWA NBI Program ↗How to read this record
SHEPHERD RD 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 SHEPHERD RD against other structures in Isabella 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 SHEPHERD RD?
SHEPHERD RD in Isabella, Michigan on the FHWA's 0–9 scale.
How often is SHEPHERD RD inspected?
SHEPHERD RD'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 85 vehicles per day.
What does “structurally deficient” mean in older bridge reports?
FHWA retired that reported status beginning with the 2018 archive. SHEPHERD RD 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 SHEPHERD RD?
SHEPHERD RD has an NBI inventory load rating of 12.3 metric tons.
Who is responsible for maintaining SHEPHERD RD?
SHEPHERD RD is owned and maintained by County Highway Agency.
How old is SHEPHERD RD and does age affect safety?
SHEPHERD RD was built in 1969, making it 57 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.