Williamson 11-9

Name: Williamson 11-9 — California wellbore record
Creator: Railroad Commission of Texas
License: https://www.rrc.texas.gov/site-policies/

API 0401300068 · Contra Costa County, California · Brentwood field

PluggedDry Hole

API

0401300068

Operator

Shell Western E&P Inc.

County

Contra Costa

Field

Brentwood

Spudded

1962-12-22

Location

37.947823, -121.764297

37.94782, -121.76430 · Surface location as filed with California⌘ or Ctrl + scroll to zoom

Every well in Contra Costa County, California

California state record, from CA_wells_Well.parquet. Corpus built 2026-08-19.