# Relationship history for MSHA mine 1517391

Current hierarchy: **Florida Progress Corporation → Kentucky May Mining → Spud Mine**

- 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:** Gary D  Fields → Spud Mine; 1986-06-01 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Florida Progress Corporation → Spud Mine; 1989-10-01 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Dennis  Jones → Spud Mine; 1990-07-01 to current/open; source msha-controller-operator-history
- **operator_operates_mine:** Kentucky May Coal Company Inc → Spud Mine; 1993-04-01 to 1993-08-01; source msha-controller-operator-history
- **controller_controls_operator:** Florida Progress Corporation → Kentucky May Coal Company Inc; 1993-04-01 to 1993-08-01; source msha-controller-operator-history
- **controller_controls_mine:** Hattie F  Johnson → Spud Mine; 1993-06-30 to current/open; source msha-controller-operator-history
- **operator_operates_mine:** Topper Coal Company Inc → Spud Mine; 1993-08-02 to 1993-09-21; source msha-controller-operator-history
- **controller_controls_operator:** Gary D  Fields → Topper Coal Company Inc; 1993-08-02 to 1993-09-21; source msha-controller-operator-history
- **operator_operates_mine:** Kentucky May Coal Company Inc → Spud Mine; 1993-09-22 to 1993-10-28; source msha-controller-operator-history
- **controller_controls_operator:** Florida Progress Corporation → Kentucky May Coal Company Inc; 1993-09-22 to 1993-10-28; source msha-controller-operator-history
- **operator_operates_mine:** J & V Coal Company Inc → Spud Mine; 1993-10-29 to 1997-10-15; source msha-controller-operator-history
- **controller_controls_operator:** Dennis  Jones → J & V Coal Company Inc; 1993-10-29 to 1997-10-15; source msha-controller-operator-history
- **operator_operates_mine:** Kentucky May Mining → Spud Mine; 1997-10-16 to 1999-04-25; source msha-controller-operator-history
- **controller_controls_mine:** Don  Robertson → Spud Mine; 1998-01-19 to current/open; source msha-controller-operator-history
- **operator_operates_mine:** 3-D Mining Inc → Spud Mine; 1999-04-26 to 1999-07-05; source msha-controller-operator-history
- **controller_controls_operator:** Don  Robertson → 3-D Mining Inc; 1999-04-26 to 1999-07-05; source msha-controller-operator-history
- **operator_operates_mine:** Spud Mining Inc → Spud Mine; 1999-07-06 to 2001-08-15; source msha-controller-operator-history
- **controller_controls_operator:** Hattie F  Johnson → Spud Mining Inc; 1999-07-06 to 2001-08-15; source msha-controller-operator-history
- **controller_controls_mine:** Florida Progress Corporation → Spud Mine; 2000-11-30 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Florida Progress Corporation → Kentucky May Mining; 2000-11-30 to 1999-04-25; source msha-controller-operator-history
- **operator_operates_mine:** Kentucky May Mining → Spud Mine; 2001-08-16 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Florida Progress Corporation → Kentucky May Mining; 2001-08-16 to current/open; source msha-controller-operator-history