# Relationship history for MSHA mine 4002765

Current hierarchy: **Perry Beckham J → Pine Hill Coal Company Inc → No 1 Surface**

- 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:** Perry Beckham J → No 1 Surface; 1980-05-29 to current/open; source msha-controller-operator-history
- **operator_operates_mine:** Pine Hill Coal Company Inc → No 1 Surface; 1982-01-01 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Perry Beckham J → Pine Hill Coal Company Inc; 1982-01-01 to current/open; source msha-controller-operator-history