CSAH 1
Carrying CSAH 1 over RED RIVER OF THE NORTH
2.5 MI W OF JCT TH 75, Polk, Minnesota
Data updated May 2026
FHWA NBI record, refreshed with each annual release.
Bridge Snapshot: CSAH 1
The CSAH 1 bridge in Polk, Minnesota carries CSAH 1 over RED RIVER OF THE NORTH. It was built in 1939, making it 87 years old today. The structure is built primarily of steel and spans 2 sections, stretching 110.3 meters (362 feet) end to end. Daily traffic averages 205 vehicles, placing it in the lower-traffic tier of Minnesota bridges. It is owned and maintained by County Highway Agency.
The latest FHWA inspection records show a deck rating of 0/9, superstructure at 1/9, substructure at 1/9. The weakest component sits in critical condition. At least one major component here scores 4 or below, which produces a Poor condition classification under FHWA's current reporting rules. Its NBI inventory load rating is 24.9 metric tons.
Sourced from the FHWA National Bridge Inventory. See our methodology for refresh cadence and NBI release vintage.
How CSAH 1 compares
Live comparison across Minnesota.
Historical Sufficiency Rating
PlainBridge-computedFHWA discontinued this calculated item; it does not determine current condition, funding eligibility, posting, or closure. How the historical reference is calculated.
Condition Ratings
Full 0–9 scale + sufficiency-rating breakdown: how condition ratings work.
Structural Details
- Year Built
- 1939
- Material
- Steel
- Number of Spans
- 2
- Structure Length
- 110.3 m (362 ft)
- Deck Width
- 7.9 m (26 ft)
- Owner
- County Highway Agency
- Avg Daily Traffic
- 205 vehicles/day
- Structure Number
- 5767
Location
Data Source
FHWA National Bridge Inventory (NBI).
FHWA NBI Program ↗Condition Analysis
- • The deck (driving surface) is in critical condition (0/9), with severe deterioration requiring urgent attention.
- • The superstructure (beams and supports above the deck) is in critical condition (1/9), with severe deterioration requiring urgent attention.
- • At 1/9, the substructure (piers and abutments) is in critical shape, with severe wear requiring urgent action.
How to read this record
CSAH 1 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 CSAH 1 against other structures in Polk and across Minnesota. Minnesota 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 CSAH 1?
CSAH 1 in Polk, Minnesota has a deck rating of 0/9, superstructure rating of 1/9, and substructure rating of 1/9 on the FHWA's 0–9 scale.
How often is CSAH 1 inspected?
CSAH 1'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 205 vehicles per day.
What does “structurally deficient” mean in older bridge reports?
FHWA retired that reported status beginning with the 2018 archive. CSAH 1 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 CSAH 1?
CSAH 1 has an NBI inventory load rating of 24.9 metric tons.
Who is responsible for maintaining CSAH 1?
CSAH 1 is owned and maintained by County Highway Agency.
How old is CSAH 1 and does age affect safety?
CSAH 1 was built in 1939, making it 87 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.
Every figure on PlainBridge is rendered directly from federal source data, no number is typed in by an editor. This page draws directly on federal source data, no figure is typed in by an editor. See our editorial standards & corrections policy, the methodology behind these numbers, or report a data error.