MAIN BOULDER ROAD
Carrying MAIN BOULDER ROAD over BOULDER RIVER
38 M SOUTH OF SPRINGDALE, Park, Montana
Data updated May 2026
FHWA NBI record, refreshed with each annual release.
Bridge Snapshot: MAIN BOULDER ROAD
The MAIN BOULDER ROAD bridge in Park, Montana carries MAIN BOULDER ROAD over BOULDER RIVER. It was built in 1950, making it 76 years old today. The structure is built primarily of wood or timber and spans 1 section, stretching 9.2 meters (30 feet) end to end. Daily traffic averages 156 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 6/9, superstructure at 6/9, substructure at 3/9. 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.
Sourced from the FHWA National Bridge Inventory. See our methodology for refresh cadence and NBI release vintage.
How MAIN BOULDER ROAD 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 How the historical reference is calculated.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
- 1950
- Material
- Wood or Timber
- Number of Spans
- 1
- Structure Length
- 9.2 m (30 ft)
- Deck Width
- 4.7 m (15 ft)
- Owner
- County Highway Agency
- Avg Daily Traffic
- 156 vehicles/day
- Structure Number
- 000000202208055
Location
Data Source
FHWA National Bridge Inventory (NBI).
FHWA NBI Program ↗Condition Analysis
- • The deck (driving surface) is in fair condition (6/9), with minor deterioration that may require routine maintenance.
- • The superstructure (beams and supports above the deck) is in fair condition (6/9), with minor deterioration that may require routine maintenance.
- • The substructure (piers and abutments) is in poor condition (3/9), showing advanced deterioration that may require priority repair.
How to read this record
MAIN BOULDER ROAD 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 MAIN BOULDER ROAD against other structures in Park 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 MAIN BOULDER ROAD?
MAIN BOULDER ROAD in Park, Montana has a deck rating of 6/9, superstructure rating of 6/9, and substructure rating of 3/9 on the FHWA's 0–9 scale.
How often is MAIN BOULDER ROAD inspected?
MAIN BOULDER ROAD'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 156 vehicles per day.
What does “structurally deficient” mean in older bridge reports?
FHWA retired that reported status beginning with the 2018 archive. MAIN BOULDER ROAD 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 MAIN BOULDER ROAD?
An inventory load rating is not recorded for MAIN BOULDER ROAD.
Who is responsible for maintaining MAIN BOULDER ROAD?
MAIN BOULDER ROAD is owned and maintained by County Highway Agency.
How old is MAIN BOULDER ROAD and does age affect safety?
MAIN BOULDER ROAD was built in 1950, making it 76 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.