Union-Steffensen 1

Name: Union-Steffensen 1 — California wellbore record
Creator: Railroad Commission of Texas
License: https://www.rrc.texas.gov/site-policies/

API 0401320071 · Contra Costa County, California · Dutch Slough Gas field

PluggedDry Gas

API

0401320071

Operator

Robert A. Cohan

County

Contra Costa

Field

Dutch Slough Gas

Spudded

1971-08-11

Location

38.032356, -121.660919

38.03236, -121.66092 · 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.