# Relationship history for MSHA mine 1512018

Current hierarchy: **Raschella Alfred W → Black Diamond Coal Processing Inc → Black Diamond Coal Processing Inc**

- 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:** Coal Run Processing Inc → Black Diamond Coal Processing Inc; 1979-09-01 to 1994-05-01; source msha-controller-operator-history
- **controller_controls_mine:** Van Hoose Charles → Black Diamond Coal Processing Inc; 1979-09-01 to 1994-05-01; source msha-controller-operator-history
- **controller_controls_operator:** Van Hoose Charles → Coal Run Processing Inc; 1979-09-01 to 1994-05-01; source msha-controller-operator-history
- **operator_operates_mine:** Black Diamond Coal Processing Inc → Black Diamond Coal Processing Inc; 1994-05-02 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Raschella Alfred W → Black Diamond Coal Processing Inc; 1994-05-02 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Raschella Alfred W → Black Diamond Coal Processing Inc; 1994-05-02 to current/open; source msha-controller-operator-history