Surface drill rigs 1993 United States, Mifflinburg, Pennsylvania
Surface drill rigs United States, Mifflinburg, Pennsylvania
Surface drill rigs 1979 United States, Mifflinburg, Pennsylvania
Surface drill rigs 1991 United States, Mifflinburg, Pennsylvania
Surface drill rigs 2011 United States, Mifflinburg, Pennsylvania
Surface drill rigs 1969 United States, Mifflinburg, Pennsylvania
Surface drill rigs 1978 United States, Mifflinburg, Pennsylvania
Surface drill rigs 1986 United States, Mifflinburg, Pennsylvania
Surface drill rigs 1992 United States, Mifflinburg, Pennsylvania
Surface drill rigs 1981 United States, Mifflinburg, Pennsylvania