# Relationship history for MSHA mine 4501886

Current hierarchy: **Randy  Dyche → Randy's Red Rock → Randy's Red Rock**

- 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:** D M Layman Inc → Randy's Red Rock; 1950-01-01 to 1999-08-29; source msha-controller-operator-history
- **controller_controls_mine:** Ed  Layman → Randy's Red Rock; 1950-01-01 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Ed  Layman → D M Layman Inc; 1950-01-01 to 1999-08-29; source msha-controller-operator-history
- **operator_operates_mine:** Randy's Red Rock → Randy's Red Rock; 1999-08-30 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Randy  Dyche → Randy's Red Rock; 1999-08-30 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Randy  Dyche → Randy's Red Rock; 1999-08-30 to current/open; source msha-controller-operator-history