# Relationship history for MSHA mine 1601169

Current hierarchy: **Perry Cecil → Cecil Perry Improvements Ltd → L L F**

- 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:** Cecil Perry Improvements Ltd → L L F; 1988-06-01 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Perry Cecil → L L F; 1988-06-01 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Perry Cecil → Cecil Perry Improvements Ltd; 1988-06-01 to current/open; source msha-controller-operator-history