TOMPKINS HILL ROAD
Carrying TOMPKINS HILL ROAD over SALMON CREEK
0.8 MI SOUTH OF ROUTE 345, Humboldt, California
Data updated May 2026
FHWA NBI record, refreshed with each annual release.
Bridge Snapshot: TOMPKINS HILL ROAD
The TOMPKINS HILL ROAD bridge in Humboldt, California carries TOMPKINS HILL ROAD over SALMON CREEK. It was built in 1929, making it 97 years old today. The structure is built primarily of concrete and spans 1 section, stretching 13.1 meters (43 feet) end to end. Daily traffic averages 179 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. None of this bridge's reported major components fall into the Poor condition range. Its NBI inventory load rating is 15.2 metric tons.
Sourced from the FHWA National Bridge Inventory. See our methodology for refresh cadence and NBI release vintage.
How TOMPKINS HILL ROAD 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 How the historical reference is calculated.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
- 1929
- Material
- Concrete
- Number of Spans
- 1
- Structure Length
- 13.1 m (43 ft)
- Deck Width
- 5.5 m (18 ft)
- Owner
- County Highway Agency
- Avg Daily Traffic
- 179 vehicles/day
- Structure Number
- 04C0200
Location
Data Source
FHWA National Bridge Inventory (NBI).
FHWA NBI Program ↗Condition Analysis
- • The deck (driving surface) rates good at 7/9, with no significant deterioration on file.
- • The superstructure (beams and supports above the deck) rates good at 7/9, with no significant deterioration on file.
- • The substructure (piers and abutments) rates good at 7/9, with no significant deterioration on file.
How to read this record
This page shows what the last federal inspection recorded, not whether TOMPKINS HILL ROAD 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 TOMPKINS HILL ROAD against other structures in Humboldt 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 TOMPKINS HILL ROAD?
TOMPKINS HILL ROAD in Humboldt, 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 TOMPKINS HILL ROAD inspected?
TOMPKINS HILL ROAD'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 179 vehicles per day.
What does “structurally deficient” mean in older bridge reports?
FHWA retired that reported status beginning with the 2018 archive. TOMPKINS HILL ROAD 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 TOMPKINS HILL ROAD?
TOMPKINS HILL ROAD has an NBI inventory load rating of 15.2 metric tons.
Who is responsible for maintaining TOMPKINS HILL ROAD?
TOMPKINS HILL ROAD is owned and maintained by County Highway Agency.
How old is TOMPKINS HILL ROAD and does age affect safety?
TOMPKINS HILL ROAD was built in 1929, making it 97 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.
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.