# Relationship history for MSHA mine 1516071

Current hierarchy: **Grant Ricky → Ashley Coal Company → No 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

- **controller_controls_mine:** Wynn Mike → No 1; 1985-02-01 to 1989-10-23; source msha-controller-operator-history
- **operator_operates_mine:** Lesco Mining Company → No 1; 1987-06-01 to 1989-02-16; source msha-controller-operator-history
- **controller_controls_operator:** Wynn Mike → Lesco Mining Company; 1987-06-01 to 1989-02-16; source msha-controller-operator-history
- **operator_operates_mine:** Ashley Coal Company → No 1; 1989-02-17 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Grant Ricky Et Al → No 1; 1989-02-17 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Grant Ricky Et Al → Ashley Coal Company; 1989-02-17 to current/open; source msha-controller-operator-history