# Relationship history for MSHA mine 0102575

Current hierarchy: **Russell R Don → Central Mining Inc → Poplar Springs**

- 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:** Douglas Terry R → Poplar Springs; 1978-04-19 to current/open; source msha-controller-operator-history
- **operator_operates_mine:** Central Mining Inc → Poplar Springs; 1984-04-01 to 1984-06-05; source msha-controller-operator-history
- **controller_controls_operator:** Douglas Terry R → Central Mining Inc; 1984-04-01 to 1984-06-05; source msha-controller-operator-history
- **operator_operates_mine:** Central Mining Inc → Poplar Springs; 1984-06-06 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Russell R Don → Poplar Springs; 1984-06-06 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Russell R Don → Central Mining Inc; 1984-06-06 to current/open; source msha-controller-operator-history