Self-compacting concrete and special techniques for mine in Idaho

We supplied materials to construct a 1,495- to 2,680-meter deep underground vertical shaft at the Hecla Lucky Friday mine in Mullan, Idaho.

To deliver the concrete, we developed a customized mix and delivery technique that deposited the self-compacting concrete at a depth of 1,495 meters below ground, where it was remixed and re-tempered.