# Relationship history for MSHA mine 3101935

Current hierarchy: **George C  Turner → Southern Equipment Company → ROCK FARM #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

- **operator_operates_mine:** Paul Beasley Concrete Inc → ROCK FARM #1; 1981-08-01 to 1998-06-30; source msha-controller-operator-history
- **controller_controls_mine:** Edith  Beasley → ROCK FARM #1; 1981-08-01 to 1998-06-30; source msha-controller-operator-history
- **controller_controls_operator:** Edith  Beasley → Paul Beasley Concrete Inc; 1981-08-01 to 1998-06-30; source msha-controller-operator-history
- **controller_controls_mine:** George C  Turner Et Al → ROCK FARM #1; 1985-06-01 to current/open; source msha-controller-operator-history
- **operator_operates_mine:** Southern Equipment Company → ROCK FARM #1; 1998-07-01 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** George C  Turner Et Al → Southern Equipment Company; 1998-07-01 to current/open; source msha-controller-operator-history