# Relationship history for MSHA mine 3401994

Current hierarchy: **Everett M McKee; Lovie L  McKee → M & G Rock & Stone LLC → M & G Rock & Stone LLC**

- Valid-time bounds: inclusive, date granularity
- Null end: open-ended in the upstream history row; not independent proof of present control
- Transaction-time observation: 2026-10-17T05:35:58.500035+00:00

## Valid-time edges

- **operator_operates_mine:** M & G Rock & Stone LLC → M & G Rock & Stone LLC; 2006-02-03 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Everett M McKee et al → M & G Rock & Stone LLC; 2006-02-03 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Everett M McKee et al → M & G Rock & Stone LLC; 2006-02-03 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Lovie L  McKee et al → M & G Rock & Stone LLC; 2006-02-03 to current/open; source msha-controller-operator-history