Hermansen 1-21

Name: Hermansen 1-21 — California wellbore record
Creator: Railroad Commission of Texas
License: https://www.rrc.texas.gov/site-policies/

API 0407700492 · San Joaquin County, California · McMullin Ranch Gas field

PluggedDry Hole

API

0407700492

Operator

Tesoro Petroleum Corp.

County

San Joaquin

Field

McMullin Ranch Gas

Spudded

1966-12-14

Location

37.746670, -121.209373

37.74667, -121.20937 · Surface location as filed with California⌘ or Ctrl + scroll to zoom

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