CSAH 12
Carrying CSAH 12 over LITTLE ROCK CREEK
0.7 MI NE OF JCT 10, Benton, Minnesota
Inventory: FHWA NBI 2024 · last ETL August 2026
FHWA NBI record, refreshed with each annual release.
CSAH 12 in Benton, Minnesota sits above 3% of rated Minnesota bridges on inventory load rating (18 t), while its 1967 build year is earlier than 81% of Benton's recorded-year cohort (117 bridges).
CSAH 12 in Benton, Minnesota is rated Poor in the FHWA's 2024 National Bridge Inventory. Built in 1967, it carries 3 rated components on the inspecting agency's 0-9 scale, and its weakest reported component scores 3. 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:05507
INTERSTATE-ERA · PRESTRESS · MULTI-SPAN · SUB-LED · ARTERIAL-ADT · LIGHT-LOAD · CAT-POOR
- INTERSTATE-ERA 1950–1979
- PRESTRESS Prestressed concrete
- MULTI-SPAN 3 spans
- SUB-LED Substructure-led
- ARTERIAL-ADT Arterial 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: CSAH 12
The CSAH 12 bridge in Benton, Minnesota carries CSAH 12 over LITTLE ROCK CREEK. It was built in 1967, making it 59 years old today. The structure is built primarily of prestressed concrete and spans 3 sections, stretching 22.9 meters (75 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 County Highway Agency.
The latest FHWA inspection records show a deck rating of 7/9, superstructure at 6/9, substructure at 3/9. 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 CSAH 12 compares
Age against the county: built in 1967, earlier than 95 of Benton's 117 bridges with a recorded construction year (81%), against a county median build year of 1987. Age is not a defect on its own, but it is the population from which future Poor ratings are drawn.
Live comparison across Minnesota bridges with a recorded inventory load rating (13,532 rated).
CSAH 12 vs every rated Minnesota bridge
Inventory load rating (metric tons), FHWA NBI, this state
18 Top 97% higher than 3% 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.
Benton inventory by recorded NBI category
Exclusive Good/Fair/Poor bands across all 117 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
- 1967
- Material
- Prestressed Concrete
- Number of Spans
- 3
- Structure Length
- 22.9 m (75 ft)
- Deck Width
- 9.6 m (31 ft)
- Owner
- County Highway Agency
- Avg Daily Traffic
- 1,100 vehicles/day
- Structure Number
- 05507
Condition Analysis
- • At 7/9, the deck (driving surface) is in good shape and shows no significant wear.
- • The superstructure (beams and supports above the deck) rates fair at 6/9, minor deterioration that routine maintenance should address.
- • The substructure (piers and abutments) is in poor condition (3/9), 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
CSAH 12 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 12 against other structures in Benton 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 12?
CSAH 12 in Benton, Minnesota has a deck rating of 7/9, superstructure rating of 6/9, and substructure rating of 3/9 on the FHWA's 0–9 scale.
How often is CSAH 12 inspected?
CSAH 12'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. CSAH 12 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 12?
CSAH 12 has an NBI inventory load rating of 18.0 metric tons.
Who is responsible for maintaining CSAH 12?
CSAH 12 is owned and maintained by County Highway Agency.
How old is CSAH 12 and does age affect safety?
CSAH 12 was built in 1967, making it 59 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.