# Relationship history for MSHA mine 1512452

Current hierarchy: **Rookard Jack & Hobert C Hayes → East Fork Enterprises Inc → No 2 Strip 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:** East Fork Enterprises Inc → No 2 Strip Mine; 1980-08-01 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Rookard Jack & Hobert C Hayes → No 2 Strip Mine; 1980-08-01 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Rookard Jack & Hobert C Hayes → East Fork Enterprises Inc; 1980-08-01 to current/open; source msha-controller-operator-history