# Relationship history for MSHA mine 1519828

Current hierarchy: **Jason  Pollard → Pollard Management Group of Kentucky, LLC → Poplar Grove Preparation 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: 2026-10-17T05:35:58.500035+00:00

## Valid-time edges

- **controller_controls_mine:** Paringa Resources Ltd → Poplar Grove Preparation Plant; 2015-04-01 to current/open; source msha-controller-operator-history
- **operator_operates_mine:** Hartshorne Mining, LLC → Poplar Grove Preparation Plant; 2018-05-11 to 2021-01-24; source msha-controller-operator-history
- **controller_controls_operator:** Paringa Resources Ltd → Hartshorne Mining, LLC; 2018-05-11 to 2021-01-24; source msha-controller-operator-history
- **operator_operates_mine:** Pollard Management Group of Kentucky, LLC → Poplar Grove Preparation Plant; 2021-01-25 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Jason  Pollard → Poplar Grove Preparation Plant; 2021-01-25 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Jason  Pollard → Pollard Management Group of Kentucky, LLC; 2021-01-25 to current/open; source msha-controller-operator-history