# Relationship history for MSHA mine 4607925

Current hierarchy: **Leroy  Stear → Stear Auger Mining Inc → C C Conley & Sons Auger**

- 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:** Leroy  Stear → C C Conley & Sons Auger; 1950-01-01 to current/open; source msha-controller-operator-history
- **operator_operates_mine:** Wva Coal Co-Op Inc → C C Conley & Sons Auger; 1990-08-01 to 1990-09-23; source msha-controller-operator-history
- **controller_controls_mine:** Johnson Orvid Jr → C C Conley & Sons Auger; 1990-08-01 to 1990-09-23; source msha-controller-operator-history
- **controller_controls_operator:** Johnson Orvid Jr → Wva Coal Co-Op Inc; 1990-08-01 to 1990-09-23; source msha-controller-operator-history
- **operator_operates_mine:** Stear Auger Mining Inc → C C Conley & Sons Auger; 1990-09-24 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Leroy  Stear → Stear Auger Mining Inc; 1990-09-24 to current/open; source msha-controller-operator-history