US 75
Carrying US 75 over SAND HILL RIVER
0.3 MI N OF JCT TH 220, Polk, Minnesota
Inventory: FHWA NBI 2024 · last ETL August 2026
FHWA NBI record, refreshed with each annual release.
US 75 in Polk, Minnesota sits above 94% of rated Minnesota bridges on inventory load rating (49 t), while its 1995 build year is earlier than 45% of Polk's recorded-year cohort (268 bridges).
US 75 in Polk, Minnesota is rated Poor in the FHWA's 2024 National Bridge Inventory. Built in 1995, 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 MN:60021
LATE-CENTURY · STEEL · MULTI-SPAN · SUB-LED · ARTERIAL-ADT · HEAVY-LOAD · CAT-POOR
- LATE-CENTURY 1980–1999
- STEEL Steel
- MULTI-SPAN 3 spans
- SUB-LED Substructure-led
- ARTERIAL-ADT Arterial 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: US 75
The US 75 bridge in Polk, Minnesota carries US 75 over SAND HILL RIVER. It was built in 1995, making it 31 years old today. The structure is built primarily of steel continuous and spans 3 sections, stretching 71.3 meters (234 feet) end to end. Daily traffic averages 1,100 vehicles, placing it in the moderately-trafficked tier of Minnesota bridges. It is owned and maintained by State Highway Agency.
The latest FHWA inspection records show a deck rating of 8/9, superstructure at 6/9, substructure at 4/9. The weakest component sits in poor condition. A component scored 4 or below, placing this bridge in the federal Poor condition category rather than declaring it unsafe or closed.
How US 75 compares
Age against the county: built in 1995, earlier than 121 of Polk's 268 bridges with a recorded construction year (45%), against a county median build year of 1993. This is one of the newer structures in its county.
Live comparison across Minnesota bridges with a recorded inventory load rating (13,532 rated).
US 75 vs every rated Minnesota bridge
Inventory load rating (metric tons), FHWA NBI, this state
49 Top 6% higher than 94% of 13,532 bridges
rated Minnesota 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.
Polk inventory by recorded NBI category
Exclusive Good/Fair/Poor bands across all 268 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
- 1995
- Material
- Steel Continuous
- Number of Spans
- 3
- Structure Length
- 71.3 m (234 ft)
- Deck Width
- 14.4 m (47 ft)
- Owner
- State Highway Agency
- Avg Daily Traffic
- 1,100 vehicles/day
- Structure Number
- 60021
Condition Analysis
- • At 8/9, the deck (driving surface) is in good shape and shows no significant wear.
- • At 6/9, the superstructure (beams and supports above the deck) shows fair condition, with minor wear flagged for upkeep.
- • The substructure (piers and abutments) is in poor condition (4/9), showing advanced deterioration on the inspecting agency's 0-9 scale.
Location
Data Source
FHWA National Bridge Inventory (NBI).
FHWA NBI Program ↗How to read this record
US 75 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 US 75 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 US 75?
US 75 in Polk, Minnesota has a deck rating of 8/9, superstructure rating of 6/9, and substructure rating of 4/9 on the FHWA's 0–9 scale.
How often is US 75 inspected?
US 75'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 1,100 vehicles per day.
What does “structurally deficient” mean in older bridge reports?
FHWA retired that reported status beginning with the 2018 archive. US 75 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 US 75?
US 75 has an NBI inventory load rating of 48.5 metric tons.
Who is responsible for maintaining US 75?
US 75 is owned and maintained by State Highway Agency.
How old is US 75 and does age affect safety?
US 75 was built in 1995, making it 31 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.
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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.