# Relationship history for MSHA mine 0502610

Current hierarchy: **Lynch Maurice M → Buffalo Boy Mining Company Inc → Buffalo Boy 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:** Homestake Mining Company → Buffalo Boy Mine; 1950-01-01 to current/open; source msha-controller-operator-history
- **operator_operates_mine:** San Juan Milling Company → Buffalo Boy Mine; 1950-01-01 to 1979-02-15; source msha-controller-operator-history
- **controller_controls_mine:** Petty John → Buffalo Boy Mine; 1950-01-01 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Petty John → San Juan Milling Company; 1950-01-01 to 1979-02-15; source msha-controller-operator-history
- **operator_operates_mine:** Homestake Mining Company → Buffalo Boy Mine; 1979-02-16 to 1983-07-04; source msha-controller-operator-history
- **controller_controls_operator:** Homestake Mining Company → Homestake Mining Company; 1979-02-16 to 1983-07-04; source msha-controller-operator-history
- **operator_operates_mine:** Buffalo Boy Mining Company Inc → Buffalo Boy Mine; 1983-07-05 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Lynch Maurice M → Buffalo Boy Mine; 1983-07-05 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Lynch Maurice M → Buffalo Boy Mining Company Inc; 1983-07-05 to current/open; source msha-controller-operator-history