Who operates Hemlock 59?

Hemlock 59 (API 37-083-23256) is operated by Le Mallory & Son according to the Pennsylvania regulator's registry.

Is Hemlock 59 plugged or still active?

Hemlock 59 is a documented ORPHANED well — unplugged with no solvent operator of record.

Where is Hemlock 59 located?

Hemlock 59 is in McKean County, Pennsylvania at 41.87240, -78.84573.

API 37-083-23256OrphanedOil well

Hemlock 59

Oil well in McKean County, Pennsylvania · operated by Le Mallory & Son

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

Oct 20, 1964

Drilling began

Completion

—

Plug date

—

Total depth

—

Registry record

API #: 37-083-23256
Status: Orphaned(state code: DEP Abandoned List)
Type: Oil(OIL)
County: McKean
Coordinates: 41.87240, -78.84573
State record #: 083-23256

Operator

Le Mallory & Son

Wells operated: 3
Active: 0
States: PA

Location & nearby wells

◆ Loading map…

documentedproducingidlesealed

This entry + 8 nearby

Operate this well?

Claim your operator profile to keep well records accurate — verified operators can correct statuses and add plugging documentation.

Claim your operator profile

Nearby wells

Well	API #	Status	Type	Operator
Lot 143 1	37-083-47225	Active	Oil	Pennhills Resources LLC
Serial 407p 407p	37-083-04479	Active	Injection	Natl Fuel Gas Supply Corp
Lot 143 143 12	37-083-48065	Active	Oil	Pennhills Resources LLC
Allegheny National Forest (Lot 149) 1325-P	37-083-36027	Active	Injection	Natl Fuel Gas Supply Corp
Warrant 3121 16	37-083-48167	Active	Oil	Pennhills Resources LLC
Warrant 3086 Lease 45	37-083-48007	Other status	Oil	Eagle Resources Corp

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