# Relationship history for MSHA mine 4002646

Current hierarchy: **Karstait J W → Coal Age Mining Inc → Mine #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:** Graham John W → Mine #1; 1974-01-01 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Lowe James E → Mine #1; 1980-02-01 to current/open; source msha-controller-operator-history
- **operator_operates_mine:** Robinson Coal Company → Mine #1; 1980-10-01 to 1980-11-24; source msha-controller-operator-history
- **controller_controls_mine:** Cole Paul E → Mine #1; 1980-10-01 to 1980-11-24; source msha-controller-operator-history
- **controller_controls_operator:** Cole Paul E → Robinson Coal Company; 1980-10-01 to 1980-11-24; source msha-controller-operator-history
- **operator_operates_mine:** Coal Energy Inc → Mine #1; 1980-11-25 to 1984-02-22; source msha-controller-operator-history
- **controller_controls_operator:** Lowe James E → Coal Energy Inc; 1980-11-25 to 1984-02-22; source msha-controller-operator-history
- **operator_operates_mine:** Graco Mining Company → Mine #1; 1984-02-23 to 1984-12-13; source msha-controller-operator-history
- **controller_controls_operator:** Graham John W → Graco Mining Company; 1984-02-23 to 1984-12-13; source msha-controller-operator-history
- **operator_operates_mine:** Dixie Contractors Inc → Mine #1; 1984-12-14 to 1985-12-12; source msha-controller-operator-history
- **controller_controls_mine:** Devers Robert → Mine #1; 1984-12-14 to 1985-12-12; source msha-controller-operator-history
- **controller_controls_operator:** Devers Robert → Dixie Contractors Inc; 1984-12-14 to 1985-12-12; source msha-controller-operator-history
- **operator_operates_mine:** Circle K Energy → Mine #1; 1985-12-13 to 1986-09-30; source msha-controller-operator-history
- **controller_controls_mine:** Makaruk Ben & Tim → Mine #1; 1985-12-13 to 1986-09-30; source msha-controller-operator-history
- **controller_controls_operator:** Makaruk Ben & Tim → Circle K Energy; 1985-12-13 to 1986-09-30; source msha-controller-operator-history
- **operator_operates_mine:** Coal Age Mining Inc → Mine #1; 1986-10-01 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Karstait J W → Mine #1; 1986-10-01 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Karstait J W → Coal Age Mining Inc; 1986-10-01 to current/open; source msha-controller-operator-history