# Relationship history for MSHA mine 0102623

Current hierarchy: **Timothy L  McCoy → Alabama Land & Mineral Corp → Black Star Mine**

- 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:** Black Diamond Coal Mining Company → Black Star Mine; 1950-01-01 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Costain Group PLC → Black Star Mine; 1984-08-21 to current/open; source msha-controller-operator-history
- **operator_operates_mine:** Black Diamond Coal Mining Company → Black Star Mine; 1985-05-01 to 1988-09-14; source msha-controller-operator-history
- **controller_controls_operator:** Black Diamond Coal Mining Company → Black Diamond Coal Mining Company; 1985-05-01 to 1988-09-14; source msha-controller-operator-history
- **operator_operates_mine:** J R Mining Corp → Black Star Mine; 1988-09-15 to 1991-01-08; source msha-controller-operator-history
- **controller_controls_mine:** Ruszkowski John E → Black Star Mine; 1988-09-15 to 1991-01-08; source msha-controller-operator-history
- **controller_controls_operator:** Ruszkowski John E → J R Mining Corp; 1988-09-15 to 1991-01-08; source msha-controller-operator-history
- **operator_operates_mine:** Alabama Land & Mineral Corp → Black Star Mine; 1991-01-09 to 1993-06-06; source msha-controller-operator-history
- **controller_controls_operator:** Costain Group PLC → Alabama Land & Mineral Corp; 1991-01-09 to 1993-06-06; source msha-controller-operator-history
- **operator_operates_mine:** Black Star Inc → Black Star Mine; 1993-06-07 to 1995-01-17; source msha-controller-operator-history
- **controller_controls_mine:** Mc Clung Wilburn W → Black Star Mine; 1993-06-07 to 1995-01-17; source msha-controller-operator-history
- **controller_controls_operator:** Mc Clung Wilburn W → Black Star Inc; 1993-06-07 to 1995-01-17; source msha-controller-operator-history
- **operator_operates_mine:** Alabama Land & Mineral Corp → Black Star Mine; 1995-01-18 to 1996-01-01; source msha-controller-operator-history
- **controller_controls_operator:** Costain Group PLC → Alabama Land & Mineral Corp; 1995-01-18 to 1996-01-01; source msha-controller-operator-history
- **operator_operates_mine:** Alabama Land & Mineral Corp → Black Star Mine; 1996-01-02 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Timothy L  McCoy → Black Star Mine; 1996-01-02 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Timothy L  McCoy → Alabama Land & Mineral Corp; 1996-01-02 to current/open; source msha-controller-operator-history