# Relationship history for MSHA mine 1001971

Current hierarchy: **Miller James L & Judith A → J & J'S Down To Earth Excavation Inc → J&J'S DOWN TO EARTH EXCAVATIONS**

- 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:** J & J'S Down To Earth Excavation Inc → J&J'S DOWN TO EARTH EXCAVATIONS; 2000-01-01 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Miller James L & Judith A → J&J'S DOWN TO EARTH EXCAVATIONS; 2000-01-01 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Miller James L & Judith A → J & J'S Down To Earth Excavation Inc; 2000-01-01 to current/open; source msha-controller-operator-history