Who operates Mast Leoi J 1?

Mast Leoi J 1 (API 34-075-20101) is operated by Historic Owner according to the Ohio regulator's registry.

Is Mast Leoi J 1 plugged or still active?

Mast Leoi J 1 is a documented ORPHANED well — unplugged with no solvent operator of record.

Where is Mast Leoi J 1 located?

Mast Leoi J 1 is in Holmes County, Ohio at 40.49216, -81.84948.

API 34-075-20101OrphanedOil well

Mast Leoi J 1

Oil well in Holmes County, Ohio · operated by Historic Owner

Documented orphaned well. This well appears in the federal/state orphaned-well inventory — unplugged, with no solvent operator of record. See the orphan-well census for state and county totals and the $4.7B federal plugging program.

Spud date

—

Drilling began

Completion

Jan 5, 1942

Plug date

—

Total depth

781 ft

As published by the state

Registry record

API #: 34-075-20101
Status: Orphaned(state code: USGS DOW 2022 (OR))
Type: Oil(OG_R)
County: Holmes
Coordinates: 40.49216, -81.84948
State record #: 34075201010000

Operator

Historic Owner

Wells operated: 118,046
Active: 18,978
States: OH

Location & nearby wells

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documentedproducingidlesealed

This entry + 8 nearby

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Nearby wells

Well	API #	Status	Type	Operator
Endsley Larry A 6297	34-031-25823	Active	Oil	Northwood Energy Corp
Shumaker Levon E 5	34-031-25742	Other status	Oil	Jerry Moore Inc
Miller E E 1	34-031-26880	Active	Oil	Diversified Production LLC
Mayers & Adams 10	34-031-60099	Plugged & abandoned	Oil	Historic Owner
Gingerich Eli S & Laura 1	34-031-26737	Active	Oil	Elephant Exploration Inc.
Mayers & Adams 13	34-031-60094	Plugged & abandoned	Oil	Historic Owner

Dataset updated July 2026 . Source: Ohio oil & gas regulator registry + the USGS documented-orphaned-wells inventory.