ALUM ROCK FALLS RD
Carrying ALUM ROCK FALLS RD over PENITENCIA CREEK
1.8 MI NE OF PARK GATE, Santa Clara, California
Inventory: FHWA NBI 2024 · last ETL August 2026
FHWA NBI record, refreshed with each annual release.
ALUM ROCK FALLS RD in Santa Clara, California sits above 1% of rated California bridges on inventory load rating (9 t), while its 1922 build year is earlier than 96% of Santa Clara's recorded-year cohort (964 bridges).
ALUM ROCK FALLS RD in Santa Clara, California is rated Good in the FHWA's 2024 National Bridge Inventory. Built in 1922, it carries 3 rated components on the inspecting agency's 0-9 scale, and its weakest reported component scores 7. The lowest applicable rating sets the federal condition category, so this Good 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:37C0512
PRE-1950 · TIMBER · LONG-SPAN-RUN · TIED-CTRL · TRACE-ADT · LIGHT-LOAD · CAT-GOOD
- PRE-1950 Pre-1950
- TIMBER Wood or timber
- LONG-SPAN-RUN 5 spans
- TIED-CTRL Tied control
- TRACE-ADT Trace ADT
- LIGHT-LOAD Light load
- CAT-GOOD Good
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: ALUM ROCK FALLS RD
The ALUM ROCK FALLS RD bridge in Santa Clara, California carries ALUM ROCK FALLS RD over PENITENCIA CREEK. It was built in 1922, making it 104 years old today. It was last reconstructed in 1997, extending its service life. The structure is built primarily of wood or timber and spans 5 sections, stretching 30.6 meters (100 feet) end to end. Daily traffic averages 10 vehicles, placing it in the lower-traffic tier of California bridges. It is owned and maintained by County Highway Agency.
The latest FHWA inspection records show a deck rating of 7/9, superstructure at 7/9, substructure at 7/9. The weakest component sits in good condition. All reported major components score above the Poor range.
How ALUM ROCK FALLS RD compares
Age against the county: built in 1922, earlier than 926 of Santa Clara's 964 bridges with a recorded construction year (96%), 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 California bridges with a recorded inventory load rating (25,538 of 25,848 rated).
ALUM ROCK FALLS RD vs every rated California bridge
Inventory load rating (metric tons), FHWA NBI, this state
9 Top 99% higher than 1% 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.
Santa Clara inventory by recorded NBI category
Exclusive Good/Fair/Poor bands across all 964 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
- 1922
- Last Reconstructed
- 1997
- Material
- Wood or Timber
- Number of Spans
- 5
- Structure Length
- 30.6 m (100 ft)
- Deck Width
- 5.2 m (17 ft)
- Owner
- County Highway Agency
- Avg Daily Traffic
- 10 vehicles/day
- Structure Number
- 37C0512
Condition Analysis
- • The deck (driving surface) is in good condition (7/9), showing no significant deterioration.
- • The superstructure (beams and supports above the deck) rates good at 7/9, with no significant deterioration on file.
- • At 7/9, the substructure (piers and abutments) is in good shape and shows no significant wear.
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 ALUM ROCK FALLS RD 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 ALUM ROCK FALLS RD against other structures in Santa Clara 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 ALUM ROCK FALLS RD?
ALUM ROCK FALLS RD in Santa Clara, California has a deck rating of 7/9, superstructure rating of 7/9, and substructure rating of 7/9 on the FHWA's 0–9 scale.
How often is ALUM ROCK FALLS RD inspected?
ALUM ROCK FALLS RD'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 10 vehicles per day.
What does “structurally deficient” mean in older bridge reports?
FHWA retired that reported status beginning with the 2018 archive. ALUM ROCK FALLS RD 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 ALUM ROCK FALLS RD?
ALUM ROCK FALLS RD has an NBI inventory load rating of 8.7 metric tons.
Who is responsible for maintaining ALUM ROCK FALLS RD?
ALUM ROCK FALLS RD is owned and maintained by County Highway Agency.
How old is ALUM ROCK FALLS RD and does age affect safety?
ALUM ROCK FALLS RD was built in 1922, making it 104 years old and last reconstructed in 1997.
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.