# Relationship history for MSHA mine 1512349

Current hierarchy: **Costain Group PLC → Chapperal Coal Corp → Apple Branch Mine (D)**

- 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:** Music Tom Ed → Apple Branch Mine (D); 1978-04-01 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Costain Group PLC → Apple Branch Mine (D); 1978-10-05 to current/open; source msha-controller-operator-history
- **operator_operates_mine:** Blue River Coal Company Inc → Apple Branch Mine (D); 1980-06-01 to 1980-12-10; source msha-controller-operator-history
- **controller_controls_operator:** Music Tom Ed → Blue River Coal Company Inc; 1980-06-01 to 1980-12-10; source msha-controller-operator-history
- **operator_operates_mine:** Brooks Mining Company Inc → Apple Branch Mine (D); 1980-12-11 to 1981-09-14; source msha-controller-operator-history
- **controller_controls_mine:** Bevins Clifford G → Apple Branch Mine (D); 1980-12-11 to 1981-09-14; source msha-controller-operator-history
- **controller_controls_operator:** Bevins Clifford G → Brooks Mining Company Inc; 1980-12-11 to 1981-09-14; source msha-controller-operator-history
- **operator_operates_mine:** Chapperal Coal Corp → Apple Branch Mine (D); 1981-09-15 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Costain Group PLC → Chapperal Coal Corp; 1981-09-15 to current/open; source msha-controller-operator-history