OROVILLE CHICO HWY
Carrying OROVILLE CHICO HWY over NANCE CANYON
AT MESA ROAD, Butte, California
Inventory: FHWA NBI 2024 · last ETL August 2026
FHWA NBI record, refreshed with each annual release.
OROVILLE CHICO HWY in Butte, California sits above 8% of rated California bridges on inventory load rating (18 t), while its 1920 build year is earlier than 91% of Butte's recorded-year cohort (437 bridges).
OROVILLE CHICO HWY in Butte, California is rated Poor in the FHWA's 2024 National Bridge Inventory. Built in 1920, 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:12C0030
PRE-1950 · STEEL · MULTI-SPAN · TIED-CTRL · LOCAL-ADT · LIGHT-LOAD · CAT-POOR
- PRE-1950 Pre-1950
- STEEL Steel
- MULTI-SPAN 3 spans
- TIED-CTRL Tied control
- LOCAL-ADT Local ADT
- LIGHT-LOAD Light 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: OROVILLE CHICO HWY
The OROVILLE CHICO HWY bridge in Butte, California carries OROVILLE CHICO HWY over NANCE CANYON. It was built in 1920, making it 106 years old today. It was last reconstructed in 1975, extending its service life. The structure is built primarily of steel and spans 3 sections, stretching 14.8 meters (49 feet) end to end. Daily traffic averages 300 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 4/9, superstructure at 5/9, substructure at 4/9. The weakest component sits in poor condition. Because at least one major component scores 4 or lower, this bridge falls in FHWA's Poor condition category. That category is not a closure order.
How OROVILLE CHICO HWY compares
Age against the county: built in 1920, earlier than 398 of Butte's 437 bridges with a recorded construction year (91%), against a county median build year of 1961. 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).
OROVILLE CHICO HWY vs every rated California bridge
Inventory load rating (metric tons), FHWA NBI, this state
18 Top 92% higher than 8% 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.
Butte inventory by recorded NBI category
Exclusive Good/Fair/Poor bands across all 437 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
- 1920
- Last Reconstructed
- 1975
- Material
- Steel
- Number of Spans
- 3
- Structure Length
- 14.8 m (49 ft)
- Deck Width
- 8.4 m (28 ft)
- Owner
- County Highway Agency
- Avg Daily Traffic
- 300 vehicles/day
- Structure Number
- 12C0030
Condition Analysis
- • The deck (driving surface) is in poor condition (4/9), showing advanced deterioration on the inspecting agency's 0-9 scale.
- • The superstructure (beams and supports above the deck) rates fair at 5/9, minor deterioration that routine maintenance should address.
- • The substructure (piers and abutments) is in poor condition (4/9), showing advanced deterioration on the inspecting agency's 0-9 scale.
Location
Data Source
FHWA National Bridge Inventory (NBI).
FHWA NBI Program ↗How to read this record
OROVILLE CHICO HWY 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 OROVILLE CHICO HWY against other structures in Butte 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 OROVILLE CHICO HWY?
OROVILLE CHICO HWY in Butte, California has a deck rating of 4/9, superstructure rating of 5/9, and substructure rating of 4/9 on the FHWA's 0–9 scale.
How often is OROVILLE CHICO HWY inspected?
OROVILLE CHICO HWY'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 300 vehicles per day.
What does “structurally deficient” mean in older bridge reports?
FHWA retired that reported status beginning with the 2018 archive. OROVILLE CHICO HWY 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 OROVILLE CHICO HWY?
OROVILLE CHICO HWY has an NBI inventory load rating of 17.5 metric tons.
Who is responsible for maintaining OROVILLE CHICO HWY?
OROVILLE CHICO HWY is owned and maintained by County Highway Agency.
How old is OROVILLE CHICO HWY and does age affect safety?
OROVILLE CHICO HWY was built in 1920, making it 106 years old and last reconstructed in 1975.
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.