REDWOOD BLVD
Carrying REDWOOD BLVD over DUTTON SLOUGH
0.1 MI SE ROWLAND BL, Marin, California
Inventory: FHWA NBI 2024 · last ETL August 2026
FHWA NBI record, refreshed with each annual release.
REDWOOD BLVD in Marin, California sits above 16% of rated California bridges on inventory load rating (24 t), while its 1968 build year is earlier than 31% of Marin's recorded-year cohort (207 bridges).
REDWOOD BLVD in Marin, California is rated Fair in the FHWA's 2024 National Bridge Inventory. Built in 1968, 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 CA:27C0096
INTERSTATE-ERA · STEEL · MULTI-SPAN · SUPER-LED · ARTERIAL-ADT · STANDARD-LOAD · CAT-FAIR
- INTERSTATE-ERA 1950–1979
- STEEL Steel
- MULTI-SPAN 3 spans
- SUPER-LED Superstructure-led
- ARTERIAL-ADT Arterial ADT
- STANDARD-LOAD Standard 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: REDWOOD BLVD
The REDWOOD BLVD bridge in Marin, California carries REDWOOD BLVD over DUTTON SLOUGH. It was built in 1968, making it 58 years old today. The structure is built primarily of steel and spans 3 sections, stretching 9.4 meters (31 feet) end to end. Daily traffic averages 3,641 vehicles, placing it in the moderately-trafficked tier of California bridges. It is owned and maintained by City/Municipal Highway Agency.
The latest FHWA inspection records show superstructure at 5/9, substructure at 7/9. The weakest component sits in fair condition. No reported major component scores in the Poor range under the current federal condition thresholds.
How REDWOOD BLVD compares
Age against the county: built in 1968, earlier than 64 of Marin's 207 bridges with a recorded construction year (31%), against a county median build year of 1959. This is one of the newer structures in its county.
Live comparison across California bridges with a recorded inventory load rating (25,538 of 25,848 rated).
REDWOOD BLVD vs every rated California bridge
Inventory load rating (metric tons), FHWA NBI, this state
24 Top 84% higher than 16% of 25,538 bridges
rated California 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.
Marin inventory by recorded NBI category
Exclusive Good/Fair/Poor bands across all 207 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
- 1968
- Material
- Steel
- Number of Spans
- 3
- Structure Length
- 9.4 m (31 ft)
- Deck Width
- 27.4 m (90 ft)
- Owner
- City/Municipal Highway Agency
- Avg Daily Traffic
- 3,641 vehicles/day
- Structure Number
- 27C0096
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 good at 7/9, with no significant deterioration on file.
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 REDWOOD BLVD 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 REDWOOD BLVD 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 REDWOOD BLVD?
REDWOOD BLVD in Marin, California, superstructure rating of 5/9, and substructure rating of 7/9 on the FHWA's 0–9 scale.
How often is REDWOOD BLVD inspected?
REDWOOD BLVD'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 3,641 vehicles per day.
What does “structurally deficient” mean in older bridge reports?
FHWA retired that reported status beginning with the 2018 archive. REDWOOD BLVD 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 REDWOOD BLVD?
REDWOOD BLVD has an NBI inventory load rating of 24.3 metric tons.
Who is responsible for maintaining REDWOOD BLVD?
REDWOOD BLVD is owned and maintained by City/Municipal Highway Agency.
How old is REDWOOD BLVD and does age affect safety?
REDWOOD BLVD was built in 1968, making it 58 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.