# Relationship history for MSHA mine 1401770

Current hierarchy: **Duane K  McCoy → McCoy Rock Quarry LLC → McCoy Mine**

- Valid-time bounds: inclusive, date granularity
- Null end: open-ended in the upstream history row; not independent proof of present control
- Transaction-time observation: 2026-10-13T11:19:05.459773+00:00

## Valid-time edges

- **operator_operates_mine:** McCoy Rock Quarry LLC → McCoy Mine; 2015-02-24 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Duane K  McCoy et al → McCoy Mine; 2015-02-24 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Duane K  McCoy et al → McCoy Rock Quarry LLC; 2015-02-24 to current/open; source msha-controller-operator-history