T-397 Biddle Road
Carrying T-397 Biddle Road over CLOVER CREEK
2 MI.S.OF WILLIAMSBURG, Blair, Pennsylvania
Inventory: FHWA NBI 2024 · last ETL August 2026
FHWA NBI record, refreshed with each annual release.
T-397 Biddle Road in Blair, Pennsylvania sits above 27% of rated Pennsylvania bridges on inventory load rating (33 t), while its 1908 build year is earlier than 99% of Blair's recorded-year cohort (338 bridges).
T-397 Biddle Road in Blair, Pennsylvania is rated Poor in the FHWA's 2024 National Bridge Inventory. Built in 1908, it carries 2 rated components on the inspecting agency's 0-9 scale, and its weakest reported component scores 2. 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 PA:000000000005965
PRE-1950 · CONCRETE · SINGLE-SPAN · SUB-LED · LOCAL-ADT · STANDARD-LOAD · CAT-POOR
- PRE-1950 Pre-1950
- CONCRETE Concrete
- SINGLE-SPAN Single span
- SUB-LED Substructure-led
- LOCAL-ADT Local ADT
- STANDARD-LOAD Standard 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: T-397 Biddle Road
The T-397 Biddle Road bridge in Blair, Pennsylvania carries T-397 Biddle Road over CLOVER CREEK. It was built in 1908, making it 118 years old today. It was last reconstructed in 1955, extending its service life. The structure is built primarily of concrete and spans 1 section, stretching 18.3 meters (60 feet) end to end. Daily traffic averages 667 vehicles, placing it in the lower-traffic tier of Pennsylvania bridges. It is owned and maintained by County Highway Agency.
The latest FHWA inspection records show superstructure at 5/9, substructure at 2/9. 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.
How T-397 Biddle Road compares
Age against the county: built in 1908, earlier than 334 of Blair's 338 bridges with a recorded construction year (99%), against a county median build year of 1983. Age is not a defect on its own, but it is the population from which future Poor ratings are drawn.
Live comparison across Pennsylvania bridges with a recorded inventory load rating (23,297 of 23,299 rated).
T-397 Biddle Road vs every rated Pennsylvania bridge
Inventory load rating (metric tons), FHWA NBI, this state
33 Top 73% higher than 27% of 23,297 bridges
rated Pennsylvania 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.
Blair inventory by recorded NBI category
Exclusive Good/Fair/Poor bands across all 338 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
- 1908
- Last Reconstructed
- 1955
- Material
- Concrete
- Number of Spans
- 1
- Structure Length
- 18.3 m (60 ft)
- Deck Width
- 6.3 m (21 ft)
- Owner
- County Highway Agency
- Avg Daily Traffic
- 667 vehicles/day
- Structure Number
- 000000000005965
Condition Analysis
- • The superstructure (beams and supports above the deck) is in fair condition (5/9), with minor deterioration that may require routine maintenance.
- • The substructure (piers and abutments) rates critical at 2/9, with severe deterioration on the latest inspection.
Location
Data Source
FHWA National Bridge Inventory (NBI).
FHWA NBI Program ↗How to read this record
T-397 Biddle 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 T-397 Biddle Road against other structures in Blair 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 T-397 Biddle Road?
T-397 Biddle Road in Blair, Pennsylvania, superstructure rating of 5/9, and substructure rating of 2/9 on the FHWA's 0–9 scale.
How often is T-397 Biddle Road inspected?
T-397 Biddle 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 667 vehicles per day.
What does “structurally deficient” mean in older bridge reports?
FHWA retired that reported status beginning with the 2018 archive. T-397 Biddle 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 T-397 Biddle Road?
T-397 Biddle Road has an NBI inventory load rating of 32.7 metric tons.
Who is responsible for maintaining T-397 Biddle Road?
T-397 Biddle Road is owned and maintained by County Highway Agency.
How old is T-397 Biddle Road and does age affect safety?
T-397 Biddle Road was built in 1908, making it 118 years old and last reconstructed in 1955.
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.