# Relationship history for MSHA mine 0502549

Current hierarchy: **Silver Caswell → Bakers Park Mining & Milling Company → Bakers Park Mill**

- 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:** San Juan Milling Company → Bakers Park Mill; 1950-01-01 to 1980-04-30; source msha-controller-operator-history
- **controller_controls_mine:** Petty John → Bakers Park Mill; 1950-01-01 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Petty John → San Juan Milling Company; 1950-01-01 to 1980-04-30; source msha-controller-operator-history
- **controller_controls_mine:** Stephen C  Fearn → Bakers Park Mill; 1979-01-01 to 1981-08-11; source msha-controller-operator-history
- **operator_operates_mine:** Maverick Mining Company Inc → Bakers Park Mill; 1980-05-01 to 1980-08-04; source msha-controller-operator-history
- **controller_controls_operator:** Stephen C  Fearn → Maverick Mining Company Inc; 1980-05-01 to 1980-08-04; source msha-controller-operator-history
- **operator_operates_mine:** Bakers Park Mining & Milling Company → Bakers Park Mill; 1980-08-05 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Silver Caswell → Bakers Park Mill; 1980-08-05 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Silver Caswell → Bakers Park Mining & Milling Company; 1980-08-05 to current/open; source msha-controller-operator-history