# Relationship history for MSHA mine 1514711

Current hierarchy: **Maxie Robert → C & M Coal Company Inc → No 1 Surface**

- 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:** M K M Coal Company → No 1 Surface; 1984-07-01 to 1985-03-24; source msha-controller-operator-history
- **controller_controls_mine:** Madden John W-Gene Kincer Et Al → No 1 Surface; 1984-07-01 to 1985-03-24; source msha-controller-operator-history
- **controller_controls_operator:** Madden John W-Gene Kincer Et Al → M K M Coal Company; 1984-07-01 to 1985-03-24; source msha-controller-operator-history
- **operator_operates_mine:** C & M Coal Company Inc → No 1 Surface; 1985-03-25 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Maxie Robert → No 1 Surface; 1985-03-25 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Maxie Robert → C & M Coal Company Inc; 1985-03-25 to current/open; source msha-controller-operator-history