# Relationship history for MSHA mine 1519364

Current hierarchy: **American Resources Corporation → Perry County Coal Corporation → Upper Second Creek Portals**

- 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:** TECO Energy Inc → Upper Second Creek Portals; 2000-11-17 to 2015-09-20; source msha-controller-operator-history
- **operator_operates_mine:** Perry County Coal Corporation → Upper Second Creek Portals; 2008-12-17 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** TECO Energy Inc → Perry County Coal Corporation; 2008-12-17 to 2015-09-20; source msha-controller-operator-history
- **controller_controls_mine:** Cambrian Coal Corp → Upper Second Creek Portals; 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 → Upper Second Creek Portals; 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 → Upper Second Creek Portals; 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