SR 846 ORNGVLLE.RD
Carrying SR 846 ORNGVLLE.RD over OVER BIG RUN TRIB
WEST SALEM TOWNSHIP, Mercer, Pennsylvania
Inventory: FHWA NBI 2024 · last ETL August 2026
FHWA NBI record, refreshed with each annual release.
SR 846 ORNGVLLE.RD in Mercer, Pennsylvania sits above 36% of rated Pennsylvania bridges on inventory load rating (34 t), while its 1910 build year is earlier than 97% of Mercer's recorded-year cohort (438 bridges).
SR 846 ORNGVLLE.RD in Mercer, Pennsylvania is rated Poor in the FHWA's 2024 National Bridge Inventory. Built in 1910, 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:000000000025900
PRE-1950 · PRESTRESS · SINGLE-SPAN · SUB-LED · LOCAL-ADT · STANDARD-LOAD · CAT-POOR
- PRE-1950 Pre-1950
- PRESTRESS Prestressed 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: SR 846 ORNGVLLE.RD
The SR 846 ORNGVLLE.RD bridge in Mercer, Pennsylvania carries SR 846 ORNGVLLE.RD over OVER BIG RUN TRIB. It was built in 1910, making it 116 years old today. It was last reconstructed in 1984, extending its service life. The structure is built primarily of prestressed concrete and spans 1 section, stretching 7.6 meters (25 feet) end to end. Daily traffic averages 680 vehicles, placing it in the lower-traffic tier of Pennsylvania bridges. It is owned and maintained by State Highway Agency.
The latest FHWA inspection records show a deck rating of 7/9, superstructure at 7/9, substructure at 4/9. The weakest component sits in poor condition. At least one major component here scores 4 or below, which produces a Poor condition classification under FHWA's current reporting rules.
How SR 846 ORNGVLLE.RD compares
Age against the county: built in 1910, earlier than 423 of Mercer's 438 bridges with a recorded construction year (97%), 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).
SR 846 ORNGVLLE.RD vs every rated Pennsylvania bridge
Inventory load rating (metric tons), FHWA NBI, this state
34 Top 64% higher than 36% 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
- 1910
- Last Reconstructed
- 1984
- Material
- Prestressed Concrete
- Number of Spans
- 1
- Structure Length
- 7.6 m (25 ft)
- Deck Width
- 7.4 m (24 ft)
- Owner
- State Highway Agency
- Avg Daily Traffic
- 680 vehicles/day
- Structure Number
- 000000000025900
Condition Analysis
- • At 7/9, the deck (driving surface) is in good shape and shows no significant wear.
- • The superstructure (beams and supports above the deck) is in good condition (7/9), showing no significant deterioration.
- • 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
SR 846 ORNGVLLE.RD 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 SR 846 ORNGVLLE.RD 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 SR 846 ORNGVLLE.RD?
SR 846 ORNGVLLE.RD in Mercer, Pennsylvania has a deck rating of 7/9, superstructure rating of 7/9, and substructure rating of 4/9 on the FHWA's 0–9 scale.
How often is SR 846 ORNGVLLE.RD inspected?
SR 846 ORNGVLLE.RD'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 680 vehicles per day.
What does “structurally deficient” mean in older bridge reports?
FHWA retired that reported status beginning with the 2018 archive. SR 846 ORNGVLLE.RD 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 SR 846 ORNGVLLE.RD?
SR 846 ORNGVLLE.RD has an NBI inventory load rating of 33.6 metric tons.
Who is responsible for maintaining SR 846 ORNGVLLE.RD?
SR 846 ORNGVLLE.RD is owned and maintained by State Highway Agency.
How old is SR 846 ORNGVLLE.RD and does age affect safety?
SR 846 ORNGVLLE.RD was built in 1910, making it 116 years old and last reconstructed in 1984.
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.
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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.