# Relationship history for MSHA mine 4607669

Current hierarchy: **Radabaugh Austin Blaine → Stone Coal Company Inc → Jcb #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: 2026-10-17T05:35:58.500035+00:00

## Valid-time edges

- **controller_controls_mine:** Radabaugh Austin Blaine Et Al → Jcb #1; 1988-10-01 to current/open; source msha-controller-operator-history
- **operator_operates_mine:** Jcb Mining Inc → Jcb #1; 1989-03-01 to 1992-07-28; source msha-controller-operator-history
- **controller_controls_mine:** Loyal G  Forman Jr → Jcb #1; 1989-03-01 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Loyal G  Forman Jr → Jcb Mining Inc; 1989-03-01 to 1992-07-28; source msha-controller-operator-history
- **operator_operates_mine:** Stone Coal Company Inc → Jcb #1; 1992-07-29 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Radabaugh Austin Blaine Et Al → Stone Coal Company Inc; 1992-07-29 to current/open; source msha-controller-operator-history