BEL MARIN KEYS BL
Carrying BEL MARIN KEYS BL over ARROYO SAN JOSE
JUST N COMMERCIAL DR, Marin, California
Data updated May 2026
FHWA NBI record, refreshed with each annual release.
Bridge Snapshot: BEL MARIN KEYS BL
The BEL MARIN KEYS BL bridge in Marin, California carries BEL MARIN KEYS BL over ARROYO SAN JOSE. It was built in 1970, making it 56 years old today. It was last reconstructed in 1987, extending its service life. The structure is built primarily of concrete continuous and spans 4 sections, stretching 17.4 meters (57 feet) end to end. Daily traffic averages 20,883 vehicles, placing it in the heavily-trafficked tier of California bridges. It is owned and maintained by City/Municipal 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. Its NBI inventory load rating is 24.3 metric tons.
Sourced from the FHWA National Bridge Inventory. See our methodology for refresh cadence and NBI release vintage.
How BEL MARIN KEYS BL compares
Live comparison across California.
Historical Sufficiency Rating
PlainBridge-computedFHWA discontinued this calculated item; it does not determine current condition, funding eligibility, posting, or closure. How the historical reference is calculated.
Condition Ratings
Full 0–9 scale + sufficiency-rating breakdown: how condition ratings work.
Structural Details
- Year Built
- 1970
- Last Reconstructed
- 1987
- Material
- Concrete Continuous
- Number of Spans
- 4
- Structure Length
- 17.4 m (57 ft)
- Deck Width
- 26.2 m (86 ft)
- Owner
- City/Municipal Highway Agency
- Avg Daily Traffic
- 20,883 vehicles/day
- Structure Number
- 27C0086
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 BEL MARIN KEYS BL 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 BEL MARIN KEYS BL against other structures in Marin and across California. California 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 BEL MARIN KEYS BL?
BEL MARIN KEYS BL in Marin, California on the FHWA's 0–9 scale.
How often is BEL MARIN KEYS BL inspected?
BEL MARIN KEYS BL'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 20,883 vehicles per day.
What does “structurally deficient” mean in older bridge reports?
FHWA retired that reported status beginning with the 2018 archive. BEL MARIN KEYS BL 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 BEL MARIN KEYS BL?
BEL MARIN KEYS BL has an NBI inventory load rating of 24.3 metric tons.
Who is responsible for maintaining BEL MARIN KEYS BL?
BEL MARIN KEYS BL is owned and maintained by City/Municipal Highway Agency.
How old is BEL MARIN KEYS BL and does age affect safety?
BEL MARIN KEYS BL was built in 1970, making it 56 years old and last reconstructed in 1987.
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.
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.