# Relationship history for MSHA mine 1502085

Current hierarchy: **American Resources Corporation → Perry County Coal Corporation → HZ4-1**

- 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:** E A S Coal Company → HZ4-1; 1950-01-01 to 1983-02-28; source msha-controller-operator-history
- **controller_controls_mine:** Elmer  Whitaker → HZ4-1; 1950-01-01 to 1983-02-28; source msha-controller-operator-history
- **controller_controls_operator:** Elmer  Whitaker → E A S Coal Company; 1950-01-01 to 1983-02-28; source msha-controller-operator-history
- **operator_operates_mine:** Whitaker Coal Corp → HZ4-1; 1983-03-01 to 1996-09-03; source msha-controller-operator-history
- **controller_controls_mine:** Sunoco, Inc. → HZ4-1; 1983-03-01 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Sunoco, Inc. → Whitaker Coal Corp; 1983-03-01 to 1996-09-03; source msha-controller-operator-history
- **controller_controls_mine:** Rex  Fought → HZ4-1; 1989-03-21 to current/open; source msha-controller-operator-history
- **operator_operates_mine:** Perry County Coal Corp → HZ4-1; 1996-09-04 to 2000-11-14; source msha-controller-operator-history
- **controller_controls_mine:** Edward L Clemons Estate et al → HZ4-1; 1996-09-04 to 2001-01-16; source msha-controller-operator-history
- **controller_controls_operator:** Edward L Clemons Estate et al → Perry County Coal Corp; 1996-09-04 to 2000-11-14; source msha-controller-operator-history
- **operator_operates_mine:** Aero Energy Inc → HZ4-1; 2000-11-15 to 2001-09-23; source msha-controller-operator-history
- **controller_controls_operator:** Rex  Fought → Aero Energy Inc; 2000-11-15 to 2001-09-23; source msha-controller-operator-history
- **controller_controls_mine:** TECO Energy Inc → HZ4-1; 2000-11-17 to 2015-09-20; source msha-controller-operator-history
- **operator_operates_mine:** Perry County Coal Corporation → HZ4-1; 2001-09-24 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** TECO Energy Inc → Perry County Coal Corporation; 2001-09-24 to 2015-09-20; source msha-controller-operator-history
- **controller_controls_mine:** Cambrian Coal Corp → HZ4-1; 2015-09-21 to 2019-06-15; source msha-controller-operator-history
- **controller_controls_operator:** Cambrian Coal Corp → Perry County Coal Corporation; 2015-09-21 to 2019-06-15; source msha-controller-operator-history
- **controller_controls_mine:** J Mark  Campbell → HZ4-1; 2019-06-16 to 2019-09-30; source msha-controller-operator-history
- **controller_controls_operator:** J Mark  Campbell → Perry County Coal Corporation; 2019-06-16 to 2019-09-30; source msha-controller-operator-history
- **controller_controls_mine:** American Resources Corporation → HZ4-1; 2019-10-01 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** American Resources Corporation → Perry County Coal Corporation; 2019-10-01 to current/open; source msha-controller-operator-history