# Relationship history for MSHA mine 4608050

Current hierarchy: **Steven Rocky  Justus → Jerusalem Coal Company Inc → Buckeye No 2 (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:** Woodman Three Mining Inc → Buckeye No 2 (1); 1974-01-01 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Justus Ruby Helen → Buckeye No 2 (1); 1988-08-01 to 1994-04-25; source msha-controller-operator-history
- **operator_operates_mine:** Woodman Three Mine Company Inc → Buckeye No 2 (1); 1991-06-01 to 1993-02-11; source msha-controller-operator-history
- **controller_controls_operator:** Woodman Three Mining Inc → Woodman Three Mine Company Inc; 1991-06-01 to 1993-02-11; source msha-controller-operator-history
- **operator_operates_mine:** Ruby Helen Coal Company Inc → Buckeye No 2 (1); 1993-02-12 to 1993-10-06; source msha-controller-operator-history
- **controller_controls_operator:** Justus Ruby Helen → Ruby Helen Coal Company Inc; 1993-02-12 to 1993-10-06; source msha-controller-operator-history
- **operator_operates_mine:** Jerusalem Coal Company Inc → Buckeye No 2 (1); 1993-10-07 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Steven Rocky  Justus → Buckeye No 2 (1); 1993-10-07 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Steven Rocky  Justus → Jerusalem Coal Company Inc; 1993-10-07 to current/open; source msha-controller-operator-history