JOHN MCADAM DR
Carrying JOHN MCADAM DR over DORSEY BRANCH
800 FT S OF MD 175, Howard, Maryland
Inventory: FHWA NBI 2024 · last ETL August 2026
FHWA NBI record, refreshed with each annual release.
JOHN MCADAM DR in Howard, Maryland sits above 81% of rated Maryland bridges on inventory load rating (67 t), while its 2000 build year is earlier than 13% of Howard's recorded-year cohort (309 bridges).
JOHN MCADAM DR in Howard, Maryland is rated Good in the FHWA's 2024 National Bridge Inventory. Built in 2000, 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 MD:200000HO0207010
POST-2000 · PRESTRESS · SINGLE-SPAN · CULVERT-LED · TRACE-ADT · HEAVY-LOAD · CAT-GOOD
- POST-2000 2000+
- PRESTRESS Prestressed concrete
- SINGLE-SPAN Single span
- CULVERT-LED Culvert-led
- TRACE-ADT Trace 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: JOHN MCADAM DR
The JOHN MCADAM DR bridge in Howard, Maryland carries JOHN MCADAM DR over DORSEY BRANCH. It was built in 2000, making it 26 years old today. The structure is built primarily of prestressed concrete and spans 1 section, stretching 12.4 meters (41 feet) end to end. Daily traffic averages 30 vehicles, placing it in the lower-traffic tier of Maryland bridges. It is owned and maintained by County Highway Agency.
The latest FHWA inspection records show culvert at 7/9. The weakest component sits in good condition. All reported major components score above the Poor range.
How JOHN MCADAM DR compares
Age against the county: built in 2000, earlier than 39 of Howard's 309 bridges with a recorded construction year (13%), against a county median build year of 1975. This is one of the newer structures in its county.
Live comparison across Maryland bridges with a recorded inventory load rating (5,479 of 5,484 rated).
JOHN MCADAM DR vs every rated Maryland bridge
Inventory load rating (metric tons), FHWA NBI, this state
67 Top 19% higher than 81% of 5,479 bridges
rated Maryland 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.
Howard inventory by recorded NBI category
Exclusive Good/Fair/Poor bands across all 309 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
- 2000
- Material
- Prestressed Concrete
- Number of Spans
- 1
- Structure Length
- 12.4 m (41 ft) 0
- Owner
- County Highway Agency
- Avg Daily Traffic
- 30 vehicles/day
- Structure Number
- 200000HO0207010
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 JOHN MCADAM DR 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 JOHN MCADAM DR against other structures in Howard and across Maryland. Maryland 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 JOHN MCADAM DR?
JOHN MCADAM DR in Howard, Maryland on the FHWA's 0–9 scale.
How often is JOHN MCADAM DR inspected?
JOHN MCADAM DR'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 30 vehicles per day.
What does “structurally deficient” mean in older bridge reports?
FHWA retired that reported status beginning with the 2018 archive. JOHN MCADAM DR 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 JOHN MCADAM DR?
JOHN MCADAM DR has an NBI inventory load rating of 66.7 metric tons.
Who is responsible for maintaining JOHN MCADAM DR?
JOHN MCADAM DR is owned and maintained by County Highway Agency.
How old is JOHN MCADAM DR and does age affect safety?
JOHN MCADAM DR was built in 2000, making it 26 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.