# Relationship history for MSHA mine 4608102

Current hierarchy: **Carl  Kirk → North Star Contractors Incorporated → No 7**

- Valid-time bounds: inclusive, date granularity
- Null end: open-ended in the upstream history row; not independent proof of present control
- Transaction-time observation: 2026-10-17T05:35:58.500035+00:00

## Valid-time edges

- **controller_controls_mine:** Carl  Kirk et al → No 7; 1988-10-01 to current/open; source msha-controller-operator-history
- **operator_operates_mine:** Ragland Coal Company Inc → No 7; 1991-10-01 to 1995-03-15; source msha-controller-operator-history
- **controller_controls_mine:** Sheridan  Booth Jr → No 7; 1991-10-01 to 1995-03-15; source msha-controller-operator-history
- **controller_controls_operator:** Sheridan  Booth Jr → Ragland Coal Company Inc; 1991-10-01 to 1995-03-15; source msha-controller-operator-history
- **controller_controls_mine:** Amon L  Mahon → No 7; 1994-11-17 to current/open; source msha-controller-operator-history
- **operator_operates_mine:** Durbin Coal Inc → No 7; 1995-03-16 to 1999-08-29; source msha-controller-operator-history
- **controller_controls_mine:** Carl  Kirk et al → No 7; 1995-03-16 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Carl  Kirk et al → Durbin Coal Inc; 1995-03-16 to 1999-08-29; source msha-controller-operator-history
- **operator_operates_mine:** Island Fork Construction Ltd → No 7; 1999-08-30 to 2002-12-05; source msha-controller-operator-history
- **controller_controls_operator:** Amon L  Mahon → Island Fork Construction Ltd; 1999-08-30 to 2002-12-05; source msha-controller-operator-history
- **operator_operates_mine:** North Star Contractors Incorporated → No 7; 2002-12-06 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Carl  Kirk et al → North Star Contractors Incorporated; 2002-12-06 to current/open; source msha-controller-operator-history