Mill Hill Rd
Carrying Mill Hill Rd over Wylie Run
@ INTER. WITH SR 2010, Allegheny, Pennsylvania
Inventory: FHWA NBI 2024 · last ETL August 2026
FHWA NBI record, refreshed with each annual release.
Mill Hill Rd in Allegheny, Pennsylvania sits above 65% of rated Pennsylvania bridges on inventory load rating (41 t), while its 2016 build year is earlier than 5% of Allegheny's recorded-year cohort (1,294 bridges).
Mill Hill Rd in Allegheny, Pennsylvania is rated Good in the FHWA's 2024 National Bridge Inventory. Built in 2016, it carries 1 rated component 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:000000000053369
POST-2000 · CONCRETE · SINGLE-SPAN · CULVERT-LED · ARTERIAL-ADT · HEAVY-LOAD · CAT-GOOD
- POST-2000 2000+
- CONCRETE Concrete
- SINGLE-SPAN Single span
- CULVERT-LED Culvert-led
- 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: Mill Hill Rd
The Mill Hill Rd bridge in Allegheny, Pennsylvania carries Mill Hill Rd over Wylie Run. It was built in 2016, making it 10 years old today. The structure is built primarily of concrete and spans 1 section, stretching 7.9 meters (26 feet) end to end. Daily traffic averages 1,592 vehicles, placing it in the moderately-trafficked tier of Pennsylvania bridges. It is owned and maintained by State Highway Agency.
The latest FHWA inspection records show culvert 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 Mill Hill Rd compares
Age against the county: built in 2016, earlier than 61 of Allegheny's 1,294 bridges with a recorded construction year (5%), against a county median build year of 1968. This is one of the newer structures in its county.
Live comparison across Pennsylvania bridges with a recorded inventory load rating (23,297 of 23,299 rated).
Mill Hill Rd vs every rated Pennsylvania bridge
Inventory load rating (metric tons), FHWA NBI, this state
41 Top 35% higher than 65% 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.
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
- 2016
- Material
- Concrete
- Number of Spans
- 1
- Structure Length
- 7.9 m (26 ft)
- Deck Width
- 9.9 m (32 ft)
- Owner
- State Highway Agency
- Avg Daily Traffic
- 1,592 vehicles/day
- Structure Number
- 000000000053369
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 Mill Hill Rd 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 Mill Hill Rd 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 Mill Hill Rd?
Mill Hill Rd in Allegheny, Pennsylvania on the FHWA's 0–9 scale.
How often is Mill Hill Rd inspected?
Mill Hill 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 1,592 vehicles per day.
What does “structurally deficient” mean in older bridge reports?
FHWA retired that reported status beginning with the 2018 archive. Mill Hill Rd 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 Mill Hill Rd?
Mill Hill Rd has an NBI inventory load rating of 41.1 metric tons.
Who is responsible for maintaining Mill Hill Rd?
Mill Hill Rd is owned and maintained by State Highway Agency.
How old is Mill Hill Rd and does age affect safety?
Mill Hill Rd was built in 2016, making it 10 years old.
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.