Southern Indiana Drilling works for nine steady quarry clients in a 60-mile radius of its Scottsburg, Ind., headquarters.

Expanding the Caldecott Tunnel, which lies on Highway 24 between Oakland and Orinda, Calif., involves a $420 million fourth bore project to alleviate traffic congestion. In charge of excavation from the west end of the fourth bore is FoxFire Constructors of San Clemente, Calif.

“There are drillers, and then there are blasters. We’re blasters,” explains Don Burgess of Huntsville, Ontario, one of the three owners of Rock Breakers 2007.

In 1971, Willis Miller set out to make a contribution in this life that truly would matter. He moved to Haiti, and for the next 10 years, he drilled water wells. For the past 28 years, his operation has continued as a diverse, multidenominational mission.