# Relationship history for MSHA mine 1519743

Current hierarchy: **Quest Energy Corporation → Samuel Coal Co., Inc. → No. 1 Surface**

- Valid-time bounds: inclusive, date granularity
- Null end: open-ended in the upstream history row; not independent proof of present control
- Transaction-time observation: 2026-10-17T05:35:58.500035+00:00

## Valid-time edges

- **controller_controls_mine:** Quest Energy Corporation → No. 1 Surface; 2014-01-10 to current/open; source msha-controller-operator-history
- **operator_operates_mine:** Black Pearl Resources, LLC. → No. 1 Surface; 2014-03-31 to 2015-07-27; source msha-controller-operator-history
- **controller_controls_mine:** Gloria  Johns → No. 1 Surface; 2014-03-31 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Gloria  Johns → Black Pearl Resources, LLC.; 2014-03-31 to 2015-07-27; source msha-controller-operator-history
- **operator_operates_mine:** Samuel Coal Co., Inc. → No. 1 Surface; 2015-07-28 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Quest Energy Corporation → Samuel Coal Co., Inc.; 2015-07-28 to current/open; source msha-controller-operator-history