Surface drill rigs 1991 United States, Mifflinburg, Pennsylvania
Surface drill rigs 2007 United States, Mifflinburg, Pennsylvania
Surface drill rigs 1980 United States, Mifflinburg, Pennsylvania
Surface drill rigs 1993 United States, Mifflinburg, Pennsylvania
Surface drill rigs United States, Mifflinburg, Pennsylvania
Surface drill rigs 1997 United States, Mifflinburg, Pennsylvania
Surface drill rigs 1990 United States, Mifflinburg, Pennsylvania
Surface drill rigs 2006 United States, Mifflinburg, Pennsylvania
Surface drill rigs 2010 5,050 h United States, Mount Pleasant, Pennsylvania
Surface drill rigs 2000 United States, Mifflinburg, Pennsylvania
Surface drill rigs 1985 United States, Mifflinburg, Pennsylvania