STATE PARK ROAD
Carrying STATE PARK ROAD over SOUTH FORK EEL RIVER
BENBOW STATE PARK, Humboldt, California
Data updated May 2026
FHWA NBI record, refreshed with each annual release.
Bridge Snapshot: STATE PARK ROAD
The STATE PARK ROAD bridge in Humboldt, California carries STATE PARK ROAD over SOUTH FORK EEL RIVER. It was built in 1969, making it 57 years old today. The structure is built primarily of concrete continuous and spans 14 sections, stretching 98.8 meters (324 feet) end to end. Daily traffic averages 1,100 vehicles, placing it in the moderately-trafficked tier of California bridges. It is owned and maintained by State Park/Forest/Reservation.
The latest FHWA inspection records show a deck rating of 5/9, superstructure at 5/9, substructure at 4/9. The weakest component sits in poor condition. A component scored 4 or below, placing this bridge in the federal Poor condition category rather than declaring it unsafe or closed. Its NBI inventory load rating is 37.6 metric tons.
Sourced from the FHWA National Bridge Inventory. See our methodology for refresh cadence and NBI release vintage.
How STATE PARK 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 How the historical reference is calculated.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
- 1969
- Material
- Concrete Continuous
- Number of Spans
- 14
- Structure Length
- 98.8 m (324 ft)
- Deck Width
- 4.9 m (16 ft)
- Owner
- State Park/Forest/Reservation
- Avg Daily Traffic
- 1,100 vehicles/day
- Structure Number
- 04P0008
Location
Data Source
FHWA National Bridge Inventory (NBI).
FHWA NBI Program ↗Condition Analysis
- • The deck (driving surface) is in fair condition (5/9), with minor deterioration that may require routine maintenance.
- • 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 poor at 4/9, advanced deterioration that should be prioritized for repair.
How to read this record
STATE PARK ROAD is in the federal Poor condition category. That is a component-based result, not a closure order.
- NBI condition ratings reflect the latest record in this annual dataset, not a live status. Current routine inspection intervals are risk-based.
- Understand what Poor condition does and does not mean before drawing conclusions. Poor condition explained
- Compare STATE PARK 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 STATE PARK ROAD?
STATE PARK ROAD in Humboldt, California has a deck rating of 5/9, superstructure rating of 5/9, and substructure rating of 4/9 on the FHWA's 0–9 scale.
How often is STATE PARK ROAD inspected?
STATE PARK 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 1,100 vehicles per day.
What does “structurally deficient” mean in older bridge reports?
FHWA retired that reported status beginning with the 2018 archive. STATE PARK ROAD is currently shown as Poor condition from its component ratings; that category is not a live closure or safety decision.
What is the inventory load rating for STATE PARK ROAD?
STATE PARK ROAD has an NBI inventory load rating of 37.6 metric tons.
Who is responsible for maintaining STATE PARK ROAD?
STATE PARK ROAD is owned and maintained by State Park/Forest/Reservation.
How old is STATE PARK ROAD and does age affect safety?
STATE PARK ROAD was built in 1969, making it 57 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.