▁including ▁approximately ▁ 1 . 1 ▁million ▁gross ▁acres ▁in ▁the ▁Mar cell us ▁Form ation , ▁as ▁of ▁December ▁ 3 1 , ▁ 2 0 1 9 . ▁Of ▁the ▁company ' s ▁total ▁proved ▁res erves , ▁ 8 8 % ▁are ▁located ▁in ▁the ▁Mar cell us ▁Form ation ▁and ▁ 9 5 % ▁are ▁natural ▁gas . ▁ ▁Via ▁its ▁interest ▁in ▁E Q GP ▁Hold ings , ▁LP , ▁the ▁company ▁own s ▁a ▁cont rolling ▁interest ▁in ▁E Q T ▁Mid stream ▁Part ners , ▁LP . ▁E Q M ▁own s ▁and ▁oper ates ▁mid stream ▁assets ▁in ▁the ▁App al ach ian ▁Bas in ▁and ▁provides ▁water ▁services ▁that ▁support ▁well ▁completion ▁activities ▁and ▁collect s ▁and ▁rec y cles ▁or ▁dis poses ▁of ▁flow back ▁and ▁produced ▁water . ▁ ▁History ▁In ▁ 1 8 8 4 , ▁Michael ▁and ▁Ob edia h ▁Hay maker ▁struck ▁gas ▁outside ▁of ▁Pitts burgh , ▁PA . ▁ ▁In ▁ 1 8 8 8 , ▁Equ itable ▁Gas ▁Company ▁was ▁incorpor ated ▁as ▁a ▁subs idi ary ▁of ▁Philadelphia ▁Company . ▁ ▁In ▁ 1 9 5 0 , ▁the ▁company ▁separated ▁from ▁the ▁Philadelphia ▁Company ▁and ▁listed ▁on ▁the ▁New ▁York ▁Stock ▁Exchange ▁ ▁In ▁ 1 9 8 4 , ▁the ▁company ▁changed ▁its ▁corpor ate ▁name ▁to ▁Equ itable ▁Resources , ▁Inc . ▁ ▁In ▁ 1 9 9 5 , ▁the ▁company ▁offered ▁the ▁first ▁fixed ▁bill ▁energy ▁contract ▁in ▁U .