# Relationship history for MSHA mine 1515869

Current hierarchy: **Daugherty Roger A → Buccaneer Coal Company Inc → 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:** Berwind Corporation → No 1; 1981-11-03 to current/open; source msha-controller-operator-history
- **operator_operates_mine:** Top Side Coal Company Inc → No 1; 1986-12-01 to 1989-06-12; source msha-controller-operator-history
- **controller_controls_mine:** Bailey Kenneth → No 1; 1986-12-01 to 1989-06-12; source msha-controller-operator-history
- **controller_controls_operator:** Bailey Kenneth → Top Side Coal Company Inc; 1986-12-01 to 1989-06-12; source msha-controller-operator-history
- **operator_operates_mine:** Top Side Coal Company Inc → No 1; 1989-06-13 to 1989-07-23; source msha-controller-operator-history
- **controller_controls_mine:** Burchett Darvin → No 1; 1989-06-13 to 1989-07-23; source msha-controller-operator-history
- **controller_controls_operator:** Burchett Darvin → Top Side Coal Company Inc; 1989-06-13 to 1989-07-23; source msha-controller-operator-history
- **operator_operates_mine:** Jesse Branch Coal Company → No 1; 1989-07-24 to 1989-08-13; source msha-controller-operator-history
- **controller_controls_operator:** Berwind Corporation → Jesse Branch Coal Company; 1989-07-24 to 1989-08-13; source msha-controller-operator-history
- **controller_controls_mine:** Daugherty Roger A → No 1; 1989-08-01 to current/open; source msha-controller-operator-history
- **operator_operates_mine:** Buccaneer Coal Company Inc → No 1; 1989-08-14 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Daugherty Roger A → Buccaneer Coal Company Inc; 1989-08-14 to current/open; source msha-controller-operator-history