PARNUM ROAD (US20
Carrying PARNUM ROAD (US20 over North Fork Cache Creek
4.7 MILES NW OF CLEARLAKE, Lake, California
Data updated May 2026
FHWA NBI record, refreshed with each annual release.
Bridge Snapshot: PARNUM ROAD (US20
The PARNUM ROAD (US20 bridge in Lake, California carries PARNUM ROAD (US20 over North Fork Cache Creek. It was built in 2021, making it 5 years old today. The structure is built primarily of steel and spans 1 section, stretching 31.6 meters (104 feet) end to end. Daily traffic averages 1 vehicles, placing it in the lower-traffic tier of California bridges. It is owned and maintained by Bureau of Land Management.
The latest FHWA inspection records show a deck rating of 8/9, superstructure at 8/9, substructure at 8/9. 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 32.4 metric tons.
Sourced from the FHWA National Bridge Inventory. See our methodology for refresh cadence and NBI release vintage.
How PARNUM ROAD (US20 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 How the historical reference is calculated.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
- 2021
- Material
- Steel
- Number of Spans
- 1
- Structure Length
- 31.6 m (104 ft)
- Deck Width
- 3.8 m (12 ft)
- Owner
- Bureau of Land Management
- Avg Daily Traffic
- 1 vehicles/day
- Structure Number
- 0000000L1838681
Location
Data Source
FHWA National Bridge Inventory (NBI).
FHWA NBI Program ↗Condition Analysis
- • The deck (driving surface) is in good condition (8/9), showing no significant deterioration.
- • The superstructure (beams and supports above the deck) rates good at 8/9, with no significant deterioration on file.
- • The substructure (piers and abutments) rates good at 8/9, with no significant deterioration on file.
How to read this record
This page shows what the last federal inspection recorded, not whether PARNUM ROAD (US20 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 PARNUM ROAD (US20 against other structures in Lake 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 PARNUM ROAD (US20?
PARNUM ROAD (US20 in Lake, California has a deck rating of 8/9, superstructure rating of 8/9, and substructure rating of 8/9 on the FHWA's 0–9 scale.
How often is PARNUM ROAD (US20 inspected?
PARNUM ROAD (US20'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 vehicles per day.
What does “structurally deficient” mean in older bridge reports?
FHWA retired that reported status beginning with the 2018 archive. PARNUM ROAD (US20 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 PARNUM ROAD (US20?
PARNUM ROAD (US20 has an NBI inventory load rating of 32.4 metric tons.
Who is responsible for maintaining PARNUM ROAD (US20?
PARNUM ROAD (US20 is owned and maintained by Bureau of Land Management.
How old is PARNUM ROAD (US20 and does age affect safety?
PARNUM ROAD (US20 was built in 2021, making it 5 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.