# Relationship history for MSHA mine 1508175

Current hierarchy: **J Mark  Campbell → Clintwood Elkhorn Mining Company Inc → Woodman Prep Plant**

- 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:** South Atlantic Coal Company Inc → Woodman Prep Plant; 1950-01-01 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** W R Grace & Company → Woodman Prep Plant; 1950-01-01 to current/open; source msha-controller-operator-history
- **operator_operates_mine:** Race Fork Coal Corp → Woodman Prep Plant; 1975-01-01 to 1977-04-21; source msha-controller-operator-history
- **controller_controls_operator:** W R Grace & Company → Race Fork Coal Corp; 1975-01-01 to 1977-04-21; source msha-controller-operator-history
- **controller_controls_mine:** JNO McCall Coal Company et al → Woodman Prep Plant; 1977-04-16 to current/open; source msha-controller-operator-history
- **operator_operates_mine:** Race Fork Coal Corp → Woodman Prep Plant; 1977-04-22 to 1982-02-28; source msha-controller-operator-history
- **controller_controls_operator:** JNO McCall Coal Company et al → Race Fork Coal Corp; 1977-04-22 to 1982-02-28; source msha-controller-operator-history
- **controller_controls_operator:** Crown Central Petroleum Corp et al → Race Fork Coal Corp; 1977-04-22 to 1982-02-28; source msha-controller-operator-history
- **operator_operates_mine:** Race Fork Coal Corp → Woodman Prep Plant; 1982-03-01 to 1989-10-24; source msha-controller-operator-history
- **controller_controls_operator:** South Atlantic Coal Company Inc → Race Fork Coal Corp; 1982-03-01 to 1989-10-24; source msha-controller-operator-history
- **controller_controls_mine:** TECO Energy Inc → Woodman Prep Plant; 1988-04-26 to 2015-09-20; source msha-controller-operator-history
- **operator_operates_mine:** Race Fork Coal Corp → Woodman Prep Plant; 1989-10-25 to 1996-10-23; source msha-controller-operator-history
- **controller_controls_mine:** MAPCO Inc → Woodman Prep Plant; 1989-10-25 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** MAPCO Inc → Race Fork Coal Corp; 1989-10-25 to 1996-10-23; source msha-controller-operator-history
- **operator_operates_mine:** Race Fork Coal Corp → Woodman Prep Plant; 1996-10-24 to 1999-07-14; source msha-controller-operator-history
- **controller_controls_mine:** Alliance Resource Partners LP → Woodman Prep Plant; 1996-10-24 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Alliance Resource Partners LP → Race Fork Coal Corp; 1996-10-24 to 1999-07-14; source msha-controller-operator-history
- **operator_operates_mine:** Clintwood Elkhorn Mining Company Inc → Woodman Prep Plant; 1999-07-15 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** TECO Energy Inc → Clintwood Elkhorn Mining Company Inc; 1999-07-15 to 2015-09-20; source msha-controller-operator-history
- **controller_controls_mine:** James H  Booth et al → Woodman Prep Plant; 2015-09-21 to 2019-06-15; source msha-controller-operator-history
- **controller_controls_operator:** James H  Booth et al → Clintwood Elkhorn Mining Company Inc; 2015-09-21 to 2019-06-15; source msha-controller-operator-history
- **controller_controls_mine:** J Mark  Campbell → Woodman Prep Plant; 2019-06-16 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** J Mark  Campbell → Clintwood Elkhorn Mining Company Inc; 2019-06-16 to current/open; source msha-controller-operator-history