# Relationship history for MSHA mine 2601370

Current hierarchy: **Gary W  Freiman → G & J Engines Inc → Buster 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

- **operator_operates_mine:** Kemco → Buster Mine; 1950-01-01 to 1982-04-14; source msha-controller-operator-history
- **controller_controls_mine:** Lemieux Fernand → Buster Mine; 1950-01-01 to 1982-04-14; source msha-controller-operator-history
- **controller_controls_operator:** Lemieux Fernand → Kemco; 1950-01-01 to 1982-04-14; source msha-controller-operator-history
- **operator_operates_mine:** G & J Engines Inc → Buster Mine; 1982-04-15 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Gary W  Freiman → Buster Mine; 1982-04-15 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Gary W  Freiman → G & J Engines Inc; 1982-04-15 to current/open; source msha-controller-operator-history