SAN MARTIN DRIVE
Carrying SAN MARTIN DRIVE over STONEY RUN
0.5 MI N HOWARD & 29TH ST, Baltimore city, Maryland
Inventory: FHWA NBI 2024 · last ETL August 2026
FHWA NBI record, refreshed with each annual release.
SAN MARTIN DRIVE in Baltimore city, Maryland sits above 57% of rated Maryland bridges on inventory load rating (48 t), while its 1930 build year is earlier than 86% of Baltimore city's recorded-year cohort (374 bridges).
SAN MARTIN DRIVE in Baltimore city, Maryland is rated Fair in the FHWA's 2024 National Bridge Inventory. Built in 1930, it carries 2 rated components on the inspecting agency's 0-9 scale, and its weakest reported component scores 5. The lowest applicable rating sets the federal condition category, so this Fair 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:200000BC8016010
PRE-1950 · CONCRETE · SINGLE-SPAN · TIED-CTRL · ARTERIAL-ADT · HEAVY-LOAD · CAT-FAIR
- PRE-1950 Pre-1950
- CONCRETE Concrete
- SINGLE-SPAN Single span
- TIED-CTRL Tied control
- ARTERIAL-ADT Arterial ADT
- HEAVY-LOAD Heavy load
- CAT-FAIR Fair
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: SAN MARTIN DRIVE
The SAN MARTIN DRIVE bridge in Baltimore city, Maryland carries SAN MARTIN DRIVE over STONEY RUN. It was built in 1930, making it 96 years old today. The structure is built primarily of concrete and spans 1 section, stretching 9.1 meters (30 feet) end to end. Daily traffic averages 2,034 vehicles, placing it in the moderately-trafficked tier of Maryland bridges. It is owned and maintained by City/Municipal Highway Agency.
The latest FHWA inspection records show superstructure at 5/9, substructure at 5/9. The weakest component sits in fair condition. No reported major component scores in the Poor range under the current federal condition thresholds.
How SAN MARTIN DRIVE compares
Age against the county: built in 1930, earlier than 320 of Baltimore city's 374 bridges with a recorded construction year (86%), against a county median build year of 1972. Age is not a defect on its own, but it is the population from which future Poor ratings are drawn.
Live comparison across Maryland bridges with a recorded inventory load rating (5,479 of 5,484 rated).
SAN MARTIN DRIVE vs every rated Maryland bridge
Inventory load rating (metric tons), FHWA NBI, this state
48 Top 43% higher than 57% 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.
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.
Baltimore city inventory by recorded NBI category
Exclusive Good/Fair/Poor bands across all 374 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
- 1930
- Material
- Concrete
- Number of Spans
- 1
- Structure Length
- 9.1 m (30 ft)
- Deck Width
- 10.6 m (35 ft)
- Owner
- City/Municipal Highway Agency
- Avg Daily Traffic
- 2,034 vehicles/day
- Structure Number
- 200000BC8016010
Condition Analysis
- • At 5/9, the superstructure (beams and supports above the deck) shows fair condition, with minor wear flagged for upkeep.
- • The substructure (piers and abutments) rates fair at 5/9, minor deterioration that routine maintenance should address.
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 SAN MARTIN DRIVE 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 SAN MARTIN DRIVE against other structures in Baltimore city 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 SAN MARTIN DRIVE?
SAN MARTIN DRIVE in Baltimore city, Maryland, superstructure rating of 5/9, and substructure rating of 5/9 on the FHWA's 0–9 scale.
How often is SAN MARTIN DRIVE inspected?
SAN MARTIN DRIVE'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 2,034 vehicles per day.
What does “structurally deficient” mean in older bridge reports?
FHWA retired that reported status beginning with the 2018 archive. SAN MARTIN DRIVE is currently shown as Fair condition from its component ratings; that category is not a live closure or safety decision.
What is the inventory load rating for SAN MARTIN DRIVE?
SAN MARTIN DRIVE has an NBI inventory load rating of 48.1 metric tons.
Who is responsible for maintaining SAN MARTIN DRIVE?
SAN MARTIN DRIVE is owned and maintained by City/Municipal Highway Agency.
How old is SAN MARTIN DRIVE and does age affect safety?
SAN MARTIN DRIVE was built in 1930, making it 96 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.