# Relationship history for MSHA mine 4608440

Current hierarchy: **American Metals & Coal International Inc → Alpine Development Company → Twin Peaks**

- 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:** Twin Peaks Energy Inc → Twin Peaks; 1994-08-01 to 1998-11-12; source msha-controller-operator-history
- **controller_controls_mine:** David  Hopkins → Twin Peaks; 1994-08-01 to 1998-11-12; source msha-controller-operator-history
- **controller_controls_operator:** David  Hopkins → Twin Peaks Energy Inc; 1994-08-01 to 1998-11-12; source msha-controller-operator-history
- **controller_controls_mine:** American Metals & Coal International Inc → Twin Peaks; 1996-04-01 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Stinson Virgie → Twin Peaks; 1997-04-02 to current/open; source msha-controller-operator-history
- **operator_operates_mine:** Atwell Holding Inc → Twin Peaks; 1998-11-13 to 2001-03-19; source msha-controller-operator-history
- **controller_controls_operator:** Stinson Virgie → Atwell Holding Inc; 1998-11-13 to 2001-03-19; source msha-controller-operator-history
- **operator_operates_mine:** A & M Surveying Inc → Twin Peaks; 2001-03-20 to 2002-04-30; source msha-controller-operator-history
- **controller_controls_mine:** Ronald Douglas  Mullins → Twin Peaks; 2001-03-20 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Ronald Douglas  Mullins → A & M Surveying Inc; 2001-03-20 to 2002-04-30; source msha-controller-operator-history
- **operator_operates_mine:** Alpine Development Company → Twin Peaks; 2002-05-01 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** American Metals & Coal International Inc → Alpine Development Company; 2002-05-01 to current/open; source msha-controller-operator-history