# Relationship history for MSHA mine 4606658

Current hierarchy: **Lawson Charles W → Brick Coal Inc → Cub Branch No 1**

- 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

- **controller_controls_mine:** Roy L  McCoy et al → Cub Branch No 1; 1981-10-01 to 1990-11-13; source msha-controller-operator-history
- **operator_operates_mine:** Gone Under Coal Company Inc → Cub Branch No 1; 1983-06-01 to 1990-11-13; source msha-controller-operator-history
- **controller_controls_operator:** Roy L  McCoy et al → Gone Under Coal Company Inc; 1983-06-01 to 1990-11-13; source msha-controller-operator-history
- **operator_operates_mine:** Brick Coal Inc → Cub Branch No 1; 1990-11-14 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Lawson Charles W → Cub Branch No 1; 1990-11-14 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Lawson Charles W → Brick Coal Inc; 1990-11-14 to current/open; source msha-controller-operator-history