BRIDGE 1709 T-647
Carrying BRIDGE 1709 T-647 over OVER BUTCHERY RUN
TRIPLE LINK SANDY LK TWP, Mercer, Pennsylvania
Inventory: FHWA NBI 2024 · last ETL August 2026
FHWA NBI record, refreshed with each annual release.
BRIDGE 1709 T-647 in Mercer, Pennsylvania sits above 62% of rated Pennsylvania bridges on inventory load rating (41 t), while its 1958 build year is earlier than 78% of Mercer's recorded-year cohort (438 bridges).
BRIDGE 1709 T-647 in Mercer, Pennsylvania is rated Poor in the FHWA's 2024 National Bridge Inventory. Built in 1958, it carries 3 rated components on the inspecting agency's 0-9 scale, and its weakest reported component scores 4. 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:000000000026250
INTERSTATE-ERA · PRESTRESS · SINGLE-SPAN · SUB-LED · LOCAL-ADT · HEAVY-LOAD · CAT-POOR
- INTERSTATE-ERA 1950–1979
- PRESTRESS Prestressed concrete
- SINGLE-SPAN Single span
- SUB-LED Substructure-led
- LOCAL-ADT Local ADT
- HEAVY-LOAD Heavy 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: BRIDGE 1709 T-647
The BRIDGE 1709 T-647 bridge in Mercer, Pennsylvania carries BRIDGE 1709 T-647 over OVER BUTCHERY RUN. It was built in 1958, making it 68 years old today. It was last reconstructed in 2001, extending its service life. The structure is built primarily of prestressed concrete and spans 1 section, stretching 9.8 meters (32 feet) end to end. Daily traffic averages 141 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 a deck rating of 8/9, superstructure at 8/9, substructure at 4/9. 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.
How BRIDGE 1709 T-647 compares
Age against the county: built in 1958, earlier than 342 of Mercer's 438 bridges with a recorded construction year (78%), against a county median build year of 1966. 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).
BRIDGE 1709 T-647 vs every rated Pennsylvania bridge
Inventory load rating (metric tons), FHWA NBI, this state
41 Top 38% higher than 62% 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.
Mercer inventory by recorded NBI category
Exclusive Good/Fair/Poor bands across all 438 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
- 1958
- Last Reconstructed
- 2001
- Material
- Prestressed Concrete
- Number of Spans
- 1
- Structure Length
- 9.8 m (32 ft)
- Deck Width
- 7.8 m (26 ft)
- Owner
- County Highway Agency
- Avg Daily Traffic
- 141 vehicles/day
- Structure Number
- 000000000026250
Condition Analysis
- • At 8/9, the deck (driving surface) is in good shape and shows no significant wear.
- • The superstructure (beams and supports above the deck) rates good at 8/9, with no significant deterioration on file.
- • The substructure (piers and abutments) is in poor condition (4/9), showing advanced deterioration on the inspecting agency's 0-9 scale.
Location
Data Source
FHWA National Bridge Inventory (NBI).
FHWA NBI Program ↗How to read this record
BRIDGE 1709 T-647 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 BRIDGE 1709 T-647 against other structures in Mercer 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 BRIDGE 1709 T-647?
BRIDGE 1709 T-647 in Mercer, Pennsylvania has a deck rating of 8/9, superstructure rating of 8/9, and substructure rating of 4/9 on the FHWA's 0–9 scale.
How often is BRIDGE 1709 T-647 inspected?
BRIDGE 1709 T-647'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 141 vehicles per day.
What does “structurally deficient” mean in older bridge reports?
FHWA retired that reported status beginning with the 2018 archive. BRIDGE 1709 T-647 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 BRIDGE 1709 T-647?
BRIDGE 1709 T-647 has an NBI inventory load rating of 40.8 metric tons.
Who is responsible for maintaining BRIDGE 1709 T-647?
BRIDGE 1709 T-647 is owned and maintained by County Highway Agency.
How old is BRIDGE 1709 T-647 and does age affect safety?
BRIDGE 1709 T-647 was built in 1958, making it 68 years old and last reconstructed in 2001.
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.