# Relationship history for MSHA mine 4200577

Current hierarchy: **Reid Jerry D → Associated Energy Corp → Farmers Knob/Trachyte & Blitz 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: 2026-10-17T05:35:58.500035+00:00

## Valid-time edges

- **operator_operates_mine:** Associated Energy Corp → Farmers Knob/Trachyte & Blitz Mine; 1950-01-01 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Reid Jerry D → Farmers Knob/Trachyte & Blitz Mine; 1950-01-01 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Reid Jerry D → Associated Energy Corp; 1950-01-01 to current/open; source msha-controller-operator-history