Helms and Thompson 1 Coffing
API 4003305007 · Custer County, South Dakota · Barker Dome field
Plugged and AbandonedDry Hole
API
4003305007
Operator
M. Helms and E. Thompson
County
Custer
Field
Barker Dome
Location
Permit
200
Formation tops
South Dakota records 5 formations for this well, shallowest first.
| Formation | Top (ft) | Age |
|---|---|---|
| Spearfish Formation | 160 | Triassic/Permian |
| Minnekahta Limestone | 700 | Permian |
| Opeche Shale | 745 | Permian |
| Minnelusa Formation | 805 | Permian/Pennsylvanian |
| Sundance Formation | — | Jurassic |
A dash is a formation South Dakota records for this well without a depth.
Completion
South Dakota files 1 completion report for this well.
Vertical Well
Plugged and AbandonedDry HoleSpudded
1956-09-21
Measured depth
1,417 ft
True vertical depth
1,417 ft
Location
43.487741, -103.872016
43.48774, -103.87202 · Surface location as filed with South Dakota⌘ or Ctrl + scroll to zoom
Every well in Custer County, South Dakota
South Dakota state record, from SD_wells_SDOILexport_Export__wells_Table_4_Web.parquet. Corpus built 2026-09-11.