# Relationship history for MSHA mine 1517083

Current hierarchy: **Horizon Natural Resources Incorporated → Matrix Coal Company → Seneca Coal Processing**

- 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:** Florida Progress Corporation → Seneca Coal Processing; 1989-10-01 to current/open; source msha-controller-operator-history
- **operator_operates_mine:** J-Dec Resources Inc → Seneca Coal Processing; 1991-06-01 to 1991-07-10; source msha-controller-operator-history
- **controller_controls_mine:** Hatfield Eddie → Seneca Coal Processing; 1991-06-01 to 1991-07-10; source msha-controller-operator-history
- **controller_controls_operator:** Hatfield Eddie → J-Dec Resources Inc; 1991-06-01 to 1991-07-10; source msha-controller-operator-history
- **operator_operates_mine:** R B Coal Processing → Seneca Coal Processing; 1991-07-11 to 1991-10-31; source msha-controller-operator-history
- **controller_controls_mine:** Spangler Bill → Seneca Coal Processing; 1991-07-11 to 1991-10-31; source msha-controller-operator-history
- **controller_controls_operator:** Spangler Bill → R B Coal Processing; 1991-07-11 to 1991-10-31; source msha-controller-operator-history
- **operator_operates_mine:** Chad Processing Inc → Seneca Coal Processing; 1991-11-01 to 1992-07-13; source msha-controller-operator-history
- **controller_controls_mine:** Hobart  Anderson  et al → Seneca Coal Processing; 1991-11-01 to 1992-07-13; source msha-controller-operator-history
- **controller_controls_operator:** Hobart  Anderson  et al → Chad Processing Inc; 1991-11-01 to 1992-07-13; source msha-controller-operator-history
- **operator_operates_mine:** Kentucky May Coal Company Inc → Seneca Coal Processing; 1992-07-14 to 1997-10-09; source msha-controller-operator-history
- **controller_controls_operator:** Florida Progress Corporation → Kentucky May Coal Company Inc; 1992-07-14 to 1997-10-09; source msha-controller-operator-history
- **controller_controls_mine:** Zeigler Coal Holding Company → Seneca Coal Processing; 1997-03-01 to 1998-09-01; source msha-controller-operator-history
- **operator_operates_mine:** Matrix Coal Company → Seneca Coal Processing; 1997-10-10 to 1998-09-01; source msha-controller-operator-history
- **controller_controls_operator:** Zeigler Coal Holding Company → Matrix Coal Company; 1997-10-10 to 1998-09-01; source msha-controller-operator-history
- **operator_operates_mine:** Matrix Coal Company → Seneca Coal Processing; 1998-09-02 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Horizon Natural Resources Incorporated → Seneca Coal Processing; 1998-09-02 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Horizon Natural Resources Incorporated → Matrix Coal Company; 1998-09-02 to current/open; source msha-controller-operator-history