Diamond Street
Carrying Diamond Street over AMTRAK(NE CORRI);CONRAIL
E. of 22nd Street 28D06, Philadelphia, Pennsylvania
Inventory: FHWA NBI 2024 · last ETL August 2026
FHWA NBI record, refreshed with each annual release.
Diamond Street in Philadelphia, Pennsylvania sits above 70% of rated Pennsylvania bridges on inventory load rating (44 t), while its 1918 build year is earlier than 80% of Philadelphia's recorded-year cohort (584 bridges).
Diamond Street in Philadelphia, Pennsylvania is rated Good in the FHWA's 2024 National Bridge Inventory. Built in 1918, it carries 3 rated components on the inspecting agency's 0-9 scale, and its weakest reported component scores 7. The lowest applicable rating sets the federal condition category, so this Good 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:000000000039134
PRE-1950 · PRESTRESS · MULTI-SPAN · TIED-CTRL · ARTERIAL-ADT · HEAVY-LOAD · CAT-GOOD
- PRE-1950 Pre-1950
- PRESTRESS Prestressed concrete
- MULTI-SPAN 3 spans
- TIED-CTRL Tied control
- ARTERIAL-ADT Arterial ADT
- HEAVY-LOAD Heavy load
- CAT-GOOD Good
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: Diamond Street
The Diamond Street bridge in Philadelphia, Pennsylvania carries Diamond Street over AMTRAK(NE CORRI);CONRAIL. It was built in 1918, making it 108 years old today. It was last reconstructed in 1996, extending its service life. The structure is built primarily of prestressed concrete and spans 3 sections, stretching 48.2 meters (158 feet) end to end. Daily traffic averages 9,200 vehicles, placing it in the moderately-trafficked tier of Pennsylvania bridges. It is owned and maintained by City/Municipal Highway Agency.
The latest FHWA inspection records show a deck rating of 7/9, superstructure at 8/9, substructure at 7/9. The weakest component sits in good condition. None of this bridge's reported major components fall into the Poor condition range.
How Diamond Street compares
Age against the county: built in 1918, earlier than 470 of Philadelphia's 584 bridges with a recorded construction year (80%), against a county median build year of 1964. 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).
Diamond Street vs every rated Pennsylvania bridge
Inventory load rating (metric tons), FHWA NBI, this state
44 Top 30% higher than 70% 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.
Philadelphia inventory by recorded NBI category
Exclusive Good/Fair/Poor bands across all 585 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
- 1918
- Last Reconstructed
- 1996
- Material
- Prestressed Concrete
- Number of Spans
- 3
- Structure Length
- 48.2 m (158 ft)
- Deck Width
- 19.2 m (63 ft)
- Owner
- City/Municipal Highway Agency
- Avg Daily Traffic
- 9,200 vehicles/day
- Structure Number
- 000000000039134
Condition Analysis
- • The deck (driving surface) is in good condition (7/9), showing no significant deterioration.
- • At 8/9, the superstructure (beams and supports above the deck) is in good shape and shows no significant wear.
- • The substructure (piers and abutments) is in good condition (7/9), showing no significant deterioration.
Location
Data Source
FHWA National Bridge Inventory (NBI).
FHWA NBI Program ↗How to read this record
This page shows what the last federal inspection recorded, not whether Diamond Street is safe to cross today. Here is how to use it.
- NBI condition ratings reflect the latest record in this annual dataset, not a live status. Current routine inspection intervals are risk-based.
- Learn how the 0–9 condition scale and Good/Fair/Poor categories are defined. How condition ratings work
- Compare Diamond Street against other structures in Philadelphia 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 Diamond Street?
Diamond Street in Philadelphia, Pennsylvania has a deck rating of 7/9, superstructure rating of 8/9, and substructure rating of 7/9 on the FHWA's 0–9 scale.
How often is Diamond Street inspected?
Diamond Street'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 9,200 vehicles per day.
What does “structurally deficient” mean in older bridge reports?
FHWA retired that reported status beginning with the 2018 archive. Diamond Street is currently shown as Good condition from its component ratings; that category is not a live closure or safety decision.
What is the inventory load rating for Diamond Street?
Diamond Street has an NBI inventory load rating of 43.5 metric tons.
Who is responsible for maintaining Diamond Street?
Diamond Street is owned and maintained by City/Municipal Highway Agency.
How old is Diamond Street and does age affect safety?
Diamond Street was built in 1918, making it 108 years old and last reconstructed in 1996.
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.