STATE PARK ROAD
Carrying STATE PARK ROAD over SOUTH FORK EEL RIVER
BENBOW STATE PARK, Humboldt, California
Inventory: FHWA NBI 2024 · last ETL August 2026
FHWA NBI record, refreshed with each annual release.
STATE PARK ROAD in Humboldt, California sits above 82% of rated California bridges on inventory load rating (38 t), while its 1969 build year is earlier than 38% of Humboldt's recorded-year cohort (396 bridges).
STATE PARK ROAD in Humboldt, California is rated Poor in the FHWA's 2024 National Bridge Inventory. Built in 1969, it carries 3 rated components on the inspecting agency's 0-9 scale, and its weakest reported component scores 4. The lowest applicable rating sets the federal condition category, so this Poor 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:04P0008
INTERSTATE-ERA · CONCRETE · LONG-SPAN-RUN · SUB-LED · ARTERIAL-ADT · STANDARD-LOAD · CAT-POOR
- INTERSTATE-ERA 1950–1979
- CONCRETE Concrete
- LONG-SPAN-RUN 14 spans
- SUB-LED Substructure-led
- ARTERIAL-ADT Arterial ADT
- STANDARD-LOAD Standard load
- CAT-POOR Poor
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: 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.
How STATE PARK ROAD compares
Age against the county: built in 1969, earlier than 149 of Humboldt's 396 bridges with a recorded construction year (38%), against a county median build year of 1965. 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).
STATE PARK ROAD vs every rated California bridge
Inventory load rating (metric tons), FHWA NBI, this state
38 Top 18% higher than 82% 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.
Humboldt inventory by recorded NBI category
Exclusive Good/Fair/Poor bands across all 396 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
- 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
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, with advanced deterioration recorded on the latest inspection.
Location
Data Source
FHWA National Bridge Inventory (NBI).
FHWA NBI Program ↗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.
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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.