# Relationship history for MSHA mine 4406009

Current hierarchy: **Gregory Robert → G & L Mining Company → No 1**

- 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:** Robert C  Gregory Sr. → No 1; 1983-03-31 to current/open; source msha-controller-operator-history
- **operator_operates_mine:** Cross Over Mining Company Inc → No 1; 1983-07-01 to 1983-09-08; source msha-controller-operator-history
- **controller_controls_operator:** Robert C  Gregory Sr. → Cross Over Mining Company Inc; 1983-07-01 to 1983-09-08; source msha-controller-operator-history
- **operator_operates_mine:** New Hope Mining Inc → No 1; 1983-09-09 to 1983-10-11; source msha-controller-operator-history
- **controller_controls_mine:** Blankenship Frank → No 1; 1983-09-09 to 1983-10-11; source msha-controller-operator-history
- **controller_controls_operator:** Blankenship Frank → New Hope Mining Inc; 1983-09-09 to 1983-10-11; source msha-controller-operator-history
- **operator_operates_mine:** G & L Mining Company → No 1; 1983-10-12 to 1984-01-24; source msha-controller-operator-history
- **controller_controls_mine:** De Busk Charles & Floyd Moore → No 1; 1983-10-12 to 1984-01-24; source msha-controller-operator-history
- **controller_controls_operator:** De Busk Charles & Floyd Moore → G & L Mining Company; 1983-10-12 to 1984-01-24; source msha-controller-operator-history
- **operator_operates_mine:** G & L Mining Company → No 1; 1984-01-25 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Gregory Robert → No 1; 1984-01-25 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Gregory Robert → G & L Mining Company; 1984-01-25 to current/open; source msha-controller-operator-history