# Relationship history for MSHA mine 1513730

Current hierarchy: **Mc Peek Billy H → Booker Fork Coal Corp → No 2**

- 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:** Mc Peek Billy H → No 2; 1974-07-23 to current/open; source msha-controller-operator-history
- **operator_operates_mine:** Booker Fork Coal Corp → No 2; 1982-09-01 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Mc Peek Billy H → Booker Fork Coal Corp; 1982-09-01 to current/open; source msha-controller-operator-history