# Relationship history for MSHA mine 1601368

Current hierarchy: **Shadd  Savoie; Charles  Perry → Roy Bailey Construction Inc → FRONT RIDGE PIT**

- 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:** Roy Bailey Construction Inc → FRONT RIDGE PIT; 2000-12-01 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Shadd  Savoie  et al → FRONT RIDGE PIT; 2000-12-01 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Shadd  Savoie  et al → Roy Bailey Construction Inc; 2000-12-01 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Charles  Perry  et al → Roy Bailey Construction Inc; 2000-12-01 to current/open; source msha-controller-operator-history