KING THORNE RD 355
Carrying KING THORNE RD 355 over WILSON RUN
83 FT SO INT T355 & T479, Westmoreland, Pennsylvania
Data updated May 2026
FHWA NBI record, refreshed with each annual release.
Bridge Snapshot: KING THORNE RD 355
The KING THORNE RD 355 bridge in Westmoreland, Pennsylvania carries KING THORNE RD 355 over WILSON RUN. It was built in 1979, making it 47 years old today. The structure is built primarily of prestressed concrete and spans 1 section, stretching 13.1 meters (43 feet) end to end. Daily traffic averages 54 vehicles, placing it in the lower-traffic tier of Pennsylvania bridges. It is owned and maintained by Town/Township Highway Agency.
The latest FHWA inspection records show superstructure at 4/9, substructure at 6/9. 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. Its NBI inventory load rating is 59.9 metric tons.
Sourced from the FHWA National Bridge Inventory. See our methodology for refresh cadence and NBI release vintage.
How KING THORNE RD 355 compares
Live comparison across Pennsylvania.
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 How the historical reference is calculated.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
- 1979
- Material
- Prestressed Concrete
- Number of Spans
- 1
- Structure Length
- 13.1 m (43 ft)
- Deck Width
- 19.7 m (65 ft)
- Owner
- Town/Township Highway Agency
- Avg Daily Traffic
- 54 vehicles/day
- Structure Number
- 000000000036904
Location
Data Source
FHWA National Bridge Inventory (NBI).
FHWA NBI Program ↗Condition Analysis
- • The superstructure (beams and supports above the deck) rates poor at 4/9, advanced deterioration that should be prioritized for repair.
- • At 6/9, the substructure (piers and abutments) shows fair condition, with minor wear flagged for upkeep.
How to read this record
KING THORNE RD 355 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 KING THORNE RD 355 against other structures in Westmoreland and across Pennsylvania. Pennsylvania 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 KING THORNE RD 355?
KING THORNE RD 355 in Westmoreland, Pennsylvania, superstructure rating of 4/9, and substructure rating of 6/9 on the FHWA's 0–9 scale.
How often is KING THORNE RD 355 inspected?
KING THORNE RD 355'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 54 vehicles per day.
What does “structurally deficient” mean in older bridge reports?
FHWA retired that reported status beginning with the 2018 archive. KING THORNE RD 355 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 KING THORNE RD 355?
KING THORNE RD 355 has an NBI inventory load rating of 59.9 metric tons.
Who is responsible for maintaining KING THORNE RD 355?
KING THORNE RD 355 is owned and maintained by Town/Township Highway Agency.
How old is KING THORNE RD 355 and does age affect safety?
KING THORNE RD 355 was built in 1979, making it 47 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.