Did you know?
You can earn activity points by filling your profile with information about yourself (what city you live in, your favorite team, blogs etc.)
Re: Mine Safety & Health Administration (MSHA) - Clarification of Silverado Status
Basically it is only active or abandoned. If it is inactive with no one going in, the hole must be sealed & inspectors will classify it as abandoned. Then no further inspections are required. Hope this helps you!