# Relationship history for MSHA mine 3401583

Current hierarchy: **Robert  Caylor → B & C Inc → Phoenix #4**

- 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:** Race James Q → Phoenix #4; 1985-10-18 to current/open; source msha-controller-operator-history
- **operator_operates_mine:** Ranchers Coal Company Inc → Phoenix #4; 1987-01-01 to 1989-06-19; source msha-controller-operator-history
- **controller_controls_operator:** Race James Q → Ranchers Coal Company Inc; 1987-01-01 to 1989-06-19; source msha-controller-operator-history
- **operator_operates_mine:** B & C Inc → Phoenix #4; 1989-06-20 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Robert  Caylor → Phoenix #4; 1989-06-20 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Robert  Caylor → B & C Inc; 1989-06-20 to current/open; source msha-controller-operator-history