# Relationship history for MSHA mine 0301651

Current hierarchy: **Tony Ray Thacker → Leatherhead Quartz Mining → SOUTHFORK**

- 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:** Noel R Mc Grew → SOUTHFORK; 1989-03-01 to 2000-06-30; source msha-controller-operator-history
- **controller_controls_mine:** Noel R  McGrew → SOUTHFORK; 1989-03-01 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Noel R  McGrew → Noel R Mc Grew; 1989-03-01 to 2000-06-30; source msha-controller-operator-history
- **operator_operates_mine:** Leatherhead Quartz Mining → SOUTHFORK; 2000-07-01 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Tony Ray Thacker → SOUTHFORK; 2000-07-01 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Tony Ray Thacker → Leatherhead Quartz Mining; 2000-07-01 to current/open; source msha-controller-operator-history