S FRONTAGE RD W
Carrying S FRONTAGE RD W over CLARK FORK 053
2M W ALBERTON, Mineral, Montana
Data updated May 2026
FHWA NBI record, refreshed with each annual release.
Bridge Snapshot: S FRONTAGE RD W
The S FRONTAGE RD W bridge in Mineral, Montana carries S FRONTAGE RD W over CLARK FORK 053. It was built in 1916, making it 110 years old today. It was last reconstructed in 1999, extending its service life. The structure is built primarily of steel and spans 2 sections, stretching 113.1 meters (371 feet) end to end. Daily traffic averages 171 vehicles, placing it in the lower-traffic tier of Montana bridges. It is owned and maintained by County Highway Agency.
The latest FHWA inspection records show a deck rating of 7/9, superstructure at 4/9, substructure at 5/9. The weakest component sits in poor 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. Its NBI inventory load rating is 22.7 metric tons.
Sourced from the FHWA National Bridge Inventory. See our methodology for refresh cadence and NBI release vintage.
How S FRONTAGE RD W compares
Live comparison across Montana.
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 How the historical reference is calculated.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
- 1916
- Last Reconstructed
- 1999
- Material
- Steel
- Number of Spans
- 2
- Structure Length
- 113.1 m (371 ft)
- Deck Width
- 4.9 m (16 ft)
- Owner
- County Highway Agency
- Avg Daily Traffic
- 171 vehicles/day
- Structure Number
- L31089001+04001
Location
Data Source
FHWA National Bridge Inventory (NBI).
FHWA NBI Program ↗Condition Analysis
- • The deck (driving surface) is in good condition (7/9), showing no significant deterioration.
- • The superstructure (beams and supports above the deck) rates poor at 4/9, advanced deterioration that should be prioritized for repair.
- • The substructure (piers and abutments) is in fair condition (5/9), with minor deterioration that may require routine maintenance.
How to read this record
S FRONTAGE RD W 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 S FRONTAGE RD W against other structures in Mineral and across Montana. Montana 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 S FRONTAGE RD W?
S FRONTAGE RD W in Mineral, Montana has a deck rating of 7/9, superstructure rating of 4/9, and substructure rating of 5/9 on the FHWA's 0–9 scale.
How often is S FRONTAGE RD W inspected?
S FRONTAGE RD W'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 171 vehicles per day.
What does “structurally deficient” mean in older bridge reports?
FHWA retired that reported status beginning with the 2018 archive. S FRONTAGE RD W 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 S FRONTAGE RD W?
S FRONTAGE RD W has an NBI inventory load rating of 22.7 metric tons.
Who is responsible for maintaining S FRONTAGE RD W?
S FRONTAGE RD W is owned and maintained by County Highway Agency.
How old is S FRONTAGE RD W and does age affect safety?
S FRONTAGE RD W was built in 1916, making it 110 years old and last reconstructed in 1999.
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.