Wilhite-Simcox-Star 1 Marin
API 4012920002 · Walworth County, South Dakota · Wildcat field
Converted-Fresh Water SupplyDry Hole
API
4012920002
Operator
Wilhite-Simcox-Star Drilling Inc.
County
Walworth
Field
Wildcat
Location
NWNE Sec 07 Twp 122N Rng 77W
Permit
523
Formation tops
South Dakota records 3 formations for this well, shallowest first.
| Formation | Top (ft) | Age |
|---|---|---|
| Greenhorn Limestone | 1,413 | Cretaceous |
| Dakota Mud | 1,734 | Cretaceous |
| Skull Creek Shale | 1,736 | Cretaceous |
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
Converted-Fresh Water SupplyDry HoleSpudded
1970-01-11
Measured depth
1,760 ft
True vertical depth
1,760 ft
Location
45.404207, -100.189949
45.40421, -100.18995 · Surface location as filed with South Dakota⌘ or Ctrl + scroll to zoom
Every well in Walworth County, South Dakota
South Dakota state record, from SD_wells_SDOILexport_Export__wells_Table_4_Web.parquet. Corpus built 2026-09-11.