These have been producing for the past two+ decades in Pittsburgh County.
Section 3, Township 3 North, Range 12 East Section 6, Township 4 North, Range 12 East Section 7, Township 4 North, Range 12 East Section 11, Township 4 North, Range 12 East Section 14, Township 4 North, Range 12 East Section 15, Township 4 North, Range 12 East Section 17, Township 5 North, Range 12 East Section 20, Township 5 North, Range 12 East Section 21, Township 5 North, Range 12 East Section 22, Township 4 North, Range 12 East Section 23, Township 4 North, Range 12 East Section 37, Township 4 North, Range 12 East