IS 270 NBR
Carrying IS 270 NBR over BR OF LITTLE BENNETT CRK
0.32 MILE SOUTH OF MD 109, Montgomery, Maryland
Inventory: FHWA NBI 2024 · last ETL August 2026
FHWA NBI record, refreshed with each annual release.
IS 270 NBR in Montgomery, Maryland sits above 57% of rated Maryland bridges on inventory load rating (48 t), while its 1952 build year is earlier than 86% of Montgomery's recorded-year cohort (515 bridges).
IS 270 NBR in Montgomery, Maryland is rated Fair in the FHWA's 2024 National Bridge Inventory. Built in 1952, it carries 1 rated component on the inspecting agency's 0-9 scale, and its weakest reported component scores 6. 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:100000150072020
INTERSTATE-ERA · CONCRETE · SHORT-BRIDGE · CULVERT-LED · HEAVY-ADT · HEAVY-LOAD · CAT-FAIR
- INTERSTATE-ERA 1950–1979
- CONCRETE Concrete
- SHORT-BRIDGE 8.5 m
- CULVERT-LED Culvert-led
- HEAVY-ADT Heavy 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: IS 270 NBR
The IS 270 NBR bridge in Montgomery, Maryland carries IS 270 NBR over BR OF LITTLE BENNETT CRK. It was built in 1952, making it 74 years old today. The structure is built primarily of concrete, stretching 8.5 meters (28 feet) end to end. Daily traffic averages 94,940 vehicles, placing it in the heavily-trafficked tier of Maryland bridges. It is owned and maintained by State Highway Agency.
The latest FHWA inspection records show culvert at 6/9. The weakest component sits in fair condition. None of this bridge's reported major components fall into the Poor condition range.
How IS 270 NBR compares
Age against the county: built in 1952, earlier than 441 of Montgomery's 515 bridges with a recorded construction year (86%), against a county median build year of 1982. 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).
IS 270 NBR 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.
Montgomery inventory by recorded NBI category
Exclusive Good/Fair/Poor bands across all 515 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
- 1952
- Material
- Concrete
- Structure Length
- 8.5 m (28 ft) 0
- Owner
- State Highway Agency
- Avg Daily Traffic
- 94,940 vehicles/day
- Structure Number
- 100000150072020
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 IS 270 NBR 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 IS 270 NBR against other structures in Montgomery 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 IS 270 NBR?
IS 270 NBR in Montgomery, Maryland on the FHWA's 0–9 scale.
How often is IS 270 NBR inspected?
IS 270 NBR'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 94,940 vehicles per day.
What does “structurally deficient” mean in older bridge reports?
FHWA retired that reported status beginning with the 2018 archive. IS 270 NBR 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 IS 270 NBR?
IS 270 NBR has an NBI inventory load rating of 48.1 metric tons.
Who is responsible for maintaining IS 270 NBR?
IS 270 NBR is owned and maintained by State Highway Agency.
How old is IS 270 NBR and does age affect safety?
IS 270 NBR was built in 1952, making it 74 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.