# Relationship history for MSHA mine 4406820

Current hierarchy: **Joe Douglas  Kilgore → Allied Coal Company, Inc. → #2**

- 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:** Hall Coal Company Inc → #2; 1995-12-01 to 1998-09-13; source msha-controller-operator-history
- **controller_controls_mine:** Raymond D  Hall  et al → #2; 1995-12-01 to 1998-09-13; source msha-controller-operator-history
- **controller_controls_operator:** Raymond D  Hall  et al → Hall Coal Company Inc; 1995-12-01 to 1998-09-13; source msha-controller-operator-history
- **controller_controls_mine:** Terry  Hillman → #2; 1997-12-01 to current/open; source msha-controller-operator-history
- **operator_operates_mine:** J & T Augering Inc → #2; 1998-09-14 to 2001-06-19; source msha-controller-operator-history
- **controller_controls_operator:** Terry  Hillman → J & T Augering Inc; 1998-09-14 to 2001-06-19; source msha-controller-operator-history
- **controller_controls_mine:** Joe Douglas  Kilgore → #2; 1999-11-01 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Joe Douglas  Kilgore → #2; 2001-06-01 to current/open; source msha-controller-operator-history
- **operator_operates_mine:** J & T Augering Inc → #2; 2001-06-20 to 2001-09-25; source msha-controller-operator-history
- **controller_controls_operator:** Joe Douglas  Kilgore → J & T Augering Inc; 2001-06-20 to 2001-09-25; source msha-controller-operator-history
- **operator_operates_mine:** Allied Coal Company, Inc. → #2; 2001-09-26 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Joe Douglas  Kilgore → Allied Coal Company, Inc.; 2001-09-26 to current/open; source msha-controller-operator-history