BIG TREES PARKWAY
Carrying BIG TREES PARKWAY over N FORK STANISLAUS RIVER
CALAV BIG TREES ST PK, Calaveras, California
Data updated May 2026
FHWA NBI record, refreshed with each annual release.
Bridge Snapshot: BIG TREES PARKWAY
The BIG TREES PARKWAY bridge in Calaveras, California carries BIG TREES PARKWAY over N FORK STANISLAUS RIVER. It was built in 1959, making it 67 years old today. The structure is built primarily of steel and spans 3 sections, stretching 73.8 meters (242 feet) end to end. Daily traffic averages 400 vehicles, placing it in the lower-traffic tier of California bridges. It is owned and maintained by State Park/Forest/Reservation.
The latest FHWA inspection records show a deck rating of 3/9, superstructure at 7/9, substructure at 7/9. 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.
Sourced from the FHWA National Bridge Inventory. See our methodology for refresh cadence and NBI release vintage.
How BIG TREES PARKWAY 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 How the historical reference is calculated.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
- 1959
- Material
- Steel
- Number of Spans
- 3
- Structure Length
- 73.8 m (242 ft)
- Deck Width
- 11.1 m (36 ft)
- Owner
- State Park/Forest/Reservation
- Avg Daily Traffic
- 400 vehicles/day
- Structure Number
- 30P0001
Location
Data Source
FHWA National Bridge Inventory (NBI).
FHWA NBI Program ↗Condition Analysis
- • The deck (driving surface) rates poor at 3/9, advanced deterioration that should be prioritized for repair.
- • At 7/9, the superstructure (beams and supports above the deck) is in good shape and shows no significant wear.
- • The substructure (piers and abutments) is in good condition (7/9), showing no significant deterioration.
How to read this record
BIG TREES PARKWAY 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 BIG TREES PARKWAY against other structures in Calaveras 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 BIG TREES PARKWAY?
BIG TREES PARKWAY in Calaveras, California has a deck rating of 3/9, superstructure rating of 7/9, and substructure rating of 7/9 on the FHWA's 0–9 scale.
How often is BIG TREES PARKWAY inspected?
BIG TREES PARKWAY'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 400 vehicles per day.
What does “structurally deficient” mean in older bridge reports?
FHWA retired that reported status beginning with the 2018 archive. BIG TREES PARKWAY 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 BIG TREES PARKWAY?
An inventory load rating is not recorded for BIG TREES PARKWAY.
Who is responsible for maintaining BIG TREES PARKWAY?
BIG TREES PARKWAY is owned and maintained by State Park/Forest/Reservation.
How old is BIG TREES PARKWAY and does age affect safety?
BIG TREES PARKWAY was built in 1959, making it 67 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.