Surface drill rigs United States, Mifflinburg, Pennsylvania
Surface drill rigs 2001 United States, Mifflinburg, Pennsylvania
Surface drill rigs 1993 United States, Mifflinburg, Pennsylvania
Surface drill rigs 2003 United States, Mifflinburg, Pennsylvania
Surface drill rigs 1986 United States, Mifflinburg, Pennsylvania
Surface drill rigs 1980 United States, Mifflinburg, Pennsylvania
Surface drill rigs 1969 United States, Mifflinburg, Pennsylvania
Surface drill rigs 1990 United States, Mifflinburg, Pennsylvania