425 AVE
Carrying 425 AVE over ROCK CK
10.0W & 0.9S CANOVA, Miner, South Dakota
Data updated May 2026
FHWA NBI record, refreshed with each annual release.
Bridge Snapshot: 425 AVE
The 425 AVE bridge in Miner, South Dakota carries 425 AVE over ROCK CK. It was built in 1920, making it 106 years old today. The structure is built primarily of steel and spans 1 section, stretching 11.3 meters (37 feet) end to end. Daily traffic averages 30 vehicles, placing it in the lower-traffic tier of South Dakota bridges. It is owned and maintained by County Highway Agency.
The latest FHWA inspection records show a deck rating of 5/9, superstructure at 0/9, substructure at 4/9. The weakest component sits in critical 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.
Sourced from the FHWA National Bridge Inventory. See our methodology for refresh cadence and NBI release vintage.
How 425 AVE compares
Live comparison across South Dakota.
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 How the historical reference is calculated.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
- 1920
- Material
- Steel
- Number of Spans
- 1
- Structure Length
- 11.3 m (37 ft)
- Deck Width
- 5.7 m (19 ft)
- Owner
- County Highway Agency
- Avg Daily Traffic
- 30 vehicles/day
- Structure Number
- 000000049070229
Location
Data Source
FHWA National Bridge Inventory (NBI).
FHWA NBI Program ↗Condition Analysis
- • At 5/9, the deck (driving surface) shows fair condition, with minor wear flagged for upkeep.
- • At 0/9, the superstructure (beams and supports above the deck) is in critical shape, with severe wear requiring urgent action.
- • At 4/9, the substructure (piers and abutments) is in poor shape, with advanced wear flagged for priority repair.
How to read this record
425 AVE 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 425 AVE against other structures in Miner and across South Dakota. South Dakota 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 425 AVE?
425 AVE in Miner, South Dakota has a deck rating of 5/9, superstructure rating of 0/9, and substructure rating of 4/9 on the FHWA's 0–9 scale.
How often is 425 AVE inspected?
425 AVE'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 30 vehicles per day.
What does “structurally deficient” mean in older bridge reports?
FHWA retired that reported status beginning with the 2018 archive. 425 AVE 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 425 AVE?
An inventory load rating is not recorded for 425 AVE.
Who is responsible for maintaining 425 AVE?
425 AVE is owned and maintained by County Highway Agency.
How old is 425 AVE and does age affect safety?
425 AVE was built in 1920, making it 106 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.