# Relationship history for MSHA mine 1512380

Current hierarchy: **Reynolds James → Con Mar Mining Company Inc → Regal Coal Co**

- 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:** Regal Coal Company → Regal Coal Co; 1980-06-01 to 1984-06-14; source msha-controller-operator-history
- **controller_controls_mine:** Sandlin Lewis & Curtis Sexton → Regal Coal Co; 1980-06-01 to 1984-06-14; source msha-controller-operator-history
- **controller_controls_operator:** Sandlin Lewis & Curtis Sexton → Regal Coal Company; 1980-06-01 to 1984-06-14; source msha-controller-operator-history
- **operator_operates_mine:** Con Mar Mining Company Inc → Regal Coal Co; 1984-06-15 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Reynolds James → Regal Coal Co; 1984-06-15 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Reynolds James → Con Mar Mining Company Inc; 1984-06-15 to current/open; source msha-controller-operator-history