# Relationship history for MSHA mine 0102586

Current hierarchy: **Simmons George M → Ryan'S Coal Company Inc → Holly Grove Mine**

- 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:** Simmons George M → Holly Grove Mine; 1980-12-01 to current/open; source msha-controller-operator-history
- **operator_operates_mine:** C & D Land & Minerals Inc → Holly Grove Mine; 1984-05-01 to 1984-10-14; source msha-controller-operator-history
- **controller_controls_mine:** Charles E  Justice → Holly Grove Mine; 1984-05-01 to 1984-10-14; source msha-controller-operator-history
- **controller_controls_operator:** Charles E  Justice → C & D Land & Minerals Inc; 1984-05-01 to 1984-10-14; source msha-controller-operator-history
- **operator_operates_mine:** Ryan'S Coal Company Inc → Holly Grove Mine; 1984-10-15 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Simmons George M → Ryan'S Coal Company Inc; 1984-10-15 to current/open; source msha-controller-operator-history