# Relationship history for MSHA mine 1517465

Current hierarchy: **Florida Progress Corporation → Kentucky May Mining → Double C**

- 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:** Florida Progress Corporation → Double C; 1989-10-01 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Ronnie  Thacker et al → Double C; 1992-10-29 to current/open; source msha-controller-operator-history
- **operator_operates_mine:** Chloe Elkhorn Inc → Double C; 1993-10-01 to 1994-06-01; source msha-controller-operator-history
- **controller_controls_operator:** Ronnie  Thacker et al → Chloe Elkhorn Inc; 1993-10-01 to 1994-06-01; source msha-controller-operator-history
- **controller_controls_operator:** Freddy  Thacker et al → Chloe Elkhorn Inc; 1993-10-01 to 1994-06-01; source msha-controller-operator-history
- **controller_controls_mine:** Bert T  Stanley → Double C; 1994-05-24 to 1997-03-10; source msha-controller-operator-history
- **operator_operates_mine:** Kentucky May Coal Company Inc → Double C; 1994-06-02 to 1994-07-19; source msha-controller-operator-history
- **controller_controls_operator:** Florida Progress Corporation → Kentucky May Coal Company Inc; 1994-06-02 to 1994-07-19; source msha-controller-operator-history
- **operator_operates_mine:** Double C Construction Ltd → Double C; 1994-07-20 to 1997-03-10; source msha-controller-operator-history
- **controller_controls_operator:** Bert T  Stanley → Double C Construction Ltd; 1994-07-20 to 1997-03-10; source msha-controller-operator-history
- **operator_operates_mine:** Kentucky May Mining → Double C; 1997-03-11 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Florida Progress Corporation → Double C; 2000-11-30 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Florida Progress Corporation → Kentucky May Mining; 2000-11-30 to current/open; source msha-controller-operator-history