TWENTY EIGHTH ST
Carrying TWENTY EIGHTH ST over N-S RR /PAT/SASSAFRAS ST
115 28th St Bridge, Allegheny, Pennsylvania
Inventory: FHWA NBI 2024 · last ETL August 2026
FHWA NBI record, refreshed with each annual release.
TWENTY EIGHTH ST in Allegheny, Pennsylvania sits above 6% of rated Pennsylvania bridges on inventory load rating (19 t), while its 1931 build year is earlier than 84% of Allegheny's recorded-year cohort (1,294 bridges).
TWENTY EIGHTH ST in Allegheny, Pennsylvania is rated Poor in the FHWA's 2024 National Bridge Inventory. Built in 1931, 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:000000000002461
PRE-1950 · STEEL · SINGLE-SPAN · TIED-CTRL · ARTERIAL-ADT · LIGHT-LOAD · CAT-POOR
- PRE-1950 Pre-1950
- STEEL Steel
- SINGLE-SPAN Single span
- TIED-CTRL Tied control
- ARTERIAL-ADT Arterial ADT
- LIGHT-LOAD Light 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: TWENTY EIGHTH ST
The TWENTY EIGHTH ST bridge in Allegheny, Pennsylvania carries TWENTY EIGHTH ST over N-S RR /PAT/SASSAFRAS ST. It was built in 1931, making it 95 years old today. It was last reconstructed in 1974, extending its service life. The structure is built primarily of steel and spans 1 section, stretching 96.0 meters (315 feet) end to end. Daily traffic averages 6,500 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 4/9, superstructure at 4/9, substructure at 6/9. The weakest component sits in poor 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 TWENTY EIGHTH ST compares
Age against the county: built in 1931, earlier than 1,089 of Allegheny's 1,294 bridges with a recorded construction year (84%), against a county median build year of 1968. 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).
TWENTY EIGHTH ST vs every rated Pennsylvania bridge
Inventory load rating (metric tons), FHWA NBI, this state
19 Top 94% higher than 6% 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.
Allegheny inventory by recorded NBI category
Exclusive Good/Fair/Poor bands across all 1,294 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
- 1931
- Last Reconstructed
- 1974
- Material
- Steel
- Number of Spans
- 1
- Structure Length
- 96.0 m (315 ft)
- Deck Width
- 7.5 m (25 ft)
- Owner
- City/Municipal Highway Agency
- Avg Daily Traffic
- 6,500 vehicles/day
- Structure Number
- 000000000002461
Condition Analysis
- • At 4/9, the deck (driving surface) is in poor shape, with advanced wear on file for this vintage.
- • The superstructure (beams and supports above the deck) is in poor condition (4/9), showing advanced deterioration on the inspecting agency's 0-9 scale.
- • The substructure (piers and abutments) is in fair condition (6/9), with minor deterioration that may require routine maintenance.
Location
Data Source
FHWA National Bridge Inventory (NBI).
FHWA NBI Program ↗How to read this record
TWENTY EIGHTH ST 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 TWENTY EIGHTH ST against other structures in Allegheny 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 TWENTY EIGHTH ST?
TWENTY EIGHTH ST in Allegheny, Pennsylvania has a deck rating of 4/9, superstructure rating of 4/9, and substructure rating of 6/9 on the FHWA's 0–9 scale.
How often is TWENTY EIGHTH ST inspected?
TWENTY EIGHTH ST'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 6,500 vehicles per day.
What does “structurally deficient” mean in older bridge reports?
FHWA retired that reported status beginning with the 2018 archive. TWENTY EIGHTH ST 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 TWENTY EIGHTH ST?
TWENTY EIGHTH ST has an NBI inventory load rating of 19.1 metric tons.
Who is responsible for maintaining TWENTY EIGHTH ST?
TWENTY EIGHTH ST is owned and maintained by City/Municipal Highway Agency.
How old is TWENTY EIGHTH ST and does age affect safety?
TWENTY EIGHTH ST was built in 1931, making it 95 years old and last reconstructed in 1974.
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.