FHWA NBI 2024 Inspection record Public-domain dataset

MD 6

Carrying MD 6 over BR OF PORT TOBACCO CREEK

1.9 MILES WEST OF US 301, Charles, Maryland

Data updated May 2026

FHWA NBI record, refreshed with each annual release.

Good
33 t Inventory load rating

Bridge Snapshot: MD 6

The MD 6 bridge in Charles, Maryland carries MD 6 over BR OF PORT TOBACCO CREEK. It was built in 1955, making it 71 years old today. The structure is built primarily of concrete, stretching 7.0 meters (23 feet) end to end. Daily traffic averages 9,552 vehicles, placing it in the moderately-trafficked tier of Maryland 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. All reported major components score above the Poor range. Its NBI inventory load rating is 32.7 metric tons.

Sourced from the FHWA National Bridge Inventory. See our methodology for refresh cadence and NBI release vintage.

How MD 6 compares

▼ 18.4
Load rating vs Maryland average (51.1 t)
Bottom 17%
Lower load rating than 83% of Maryland bridges
94
Bridges in Charles · 8 in Poor condition
MD 6 32.7 t
Maryland average 51.1 t

Live comparison across Maryland.

Historical Sufficiency Rating

PlainBridge-computed
91.5 / 100 - historical 80–100 band
Structural adequacy /55
55.0
Serviceability /30
30.0
Essentiality /15
6.5
Special reductions
0

FHWA discontinued this calculated item; it does not determine current condition, funding eligibility, posting, or closure. How the historical reference is calculated.

Condition Ratings

Culvert
7/9
Good (7–9)
Inventory Load Rating
32.7 t
NBI inventory level (metric tons)
Overall Condition
Good

Full 0–9 scale + sufficiency-rating breakdown: how condition ratings work.

Structural Details

Year Built
1955
Material
Concrete
Structure Length
7.0 m (23 ft)
Owner
State Highway Agency
Avg Daily Traffic
9,552 vehicles/day
Structure Number
100000080008020

How to read this record

This page shows what the last federal inspection recorded, not whether MD 6 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 MD 6 against other structures in Charles 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 MD 6?

MD 6 in Charles, Maryland on the FHWA's 0–9 scale.

How often is MD 6 inspected?

MD 6'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 9,552 vehicles per day.

What does “structurally deficient” mean in older bridge reports?

FHWA retired that reported status beginning with the 2018 archive. MD 6 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 MD 6?

MD 6 has an NBI inventory load rating of 32.7 metric tons.

Who is responsible for maintaining MD 6?

MD 6 is owned and maintained by State Highway Agency.

How old is MD 6 and does age affect safety?

MD 6 was built in 1955, making it 71 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.

Data sourced from the Federal Highway Administration National Bridge Inventory. See our methodology for details. Retrieved and formatted by PlainBridges

Every figure on PlainBridge is rendered directly from federal source data, no number is typed in by an editor. This page draws directly on federal source data, no figure is typed in by an editor. See our editorial standards & corrections policy, the methodology behind these numbers, or report a data error.