GALBRAITH LINE RD
Carrying GALBRAITH LINE RD over BLACK RIVER
SEC 20-29 WORTH TWP, Sanilac, Michigan
Inventory: FHWA NBI 2024 · last ETL August 2026
FHWA NBI record, refreshed with each annual release.
GALBRAITH LINE RD in Sanilac, Michigan is rated Poor in the FHWA's 2024 National Bridge Inventory.
Built in 1985, 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:000000000009520
LATE-CENTURY · PRESTRESS · MULTI-SPAN · TIED-CTRL · ARTERIAL-ADT · STANDARD-LOAD · CAT-POOR
- LATE-CENTURY 1980–1999
- PRESTRESS Prestressed concrete
- MULTI-SPAN 3 spans
- TIED-CTRL Tied control
- ARTERIAL-ADT Arterial ADT
- STANDARD-LOAD Standard 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: GALBRAITH LINE RD
The GALBRAITH LINE RD bridge in Sanilac, Michigan carries GALBRAITH LINE RD over BLACK RIVER. It was built in 1985, making it 41 years old today. The structure is built primarily of prestressed concrete and spans 3 sections, stretching 74.7 meters (245 feet) end to end. Daily traffic averages 1,630 vehicles, placing it in the moderately-trafficked tier of Michigan bridges. It is owned and maintained by County Highway Agency.
The latest FHWA inspection records show a deck rating of 4/9, superstructure at 4/9, substructure at 7/9. 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 GALBRAITH LINE RD compares
Age against the county: built in 1985, earlier than 69 of Sanilac's 171 bridges with a recorded construction year (40%), against a county median build year of 1983. 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).
GALBRAITH LINE RD vs every rated Michigan bridge
Inventory load rating (metric tons), FHWA NBI, this state
35 Top 63% higher than 37% 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.
Sanilac inventory by recorded NBI category
Exclusive Good/Fair/Poor bands across all 171 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
- 1985
- Material
- Prestressed Concrete
- Number of Spans
- 3
- Structure Length
- 74.7 m (245 ft)
- Deck Width
- 13.5 m (44 ft)
- Owner
- County Highway Agency
- Avg Daily Traffic
- 1,630 vehicles/day
- Structure Number
- 000000000009520
Condition Analysis
- • The deck (driving surface) rates poor at 4/9, with advanced deterioration recorded on the latest inspection.
- • At 4/9, the superstructure (beams and supports above the deck) is in poor shape, with advanced wear on file for this vintage.
- • The substructure (piers and abutments) is in good condition (7/9), showing no significant deterioration.
Location
Data Source
FHWA National Bridge Inventory (NBI).
FHWA NBI Program ↗How to read this record
GALBRAITH LINE 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 GALBRAITH LINE RD against other structures in Sanilac 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 GALBRAITH LINE RD?
GALBRAITH LINE RD in Sanilac, Michigan has a deck rating of 4/9, superstructure rating of 4/9, and substructure rating of 7/9 on the FHWA's 0–9 scale.
How often is GALBRAITH LINE RD inspected?
GALBRAITH LINE 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 1,630 vehicles per day.
What does “structurally deficient” mean in older bridge reports?
FHWA retired that reported status beginning with the 2018 archive. GALBRAITH LINE 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 GALBRAITH LINE RD?
GALBRAITH LINE RD has an NBI inventory load rating of 35.3 metric tons.
Who is responsible for maintaining GALBRAITH LINE RD?
GALBRAITH LINE RD is owned and maintained by County Highway Agency.
How old is GALBRAITH LINE RD and does age affect safety?
GALBRAITH LINE RD was built in 1985, making it 41 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.