# Relationship history for MSHA mine 4607415

Current hierarchy: **Billy R  Lee → Dixs Creek Mining Company → No 30 Mine**

- 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

- **operator_operates_mine:** Double G Coal Company Inc → No 30 Mine; 1987-12-01 to 1989-03-29; source msha-controller-operator-history
- **controller_controls_mine:** Cline Gordon & Gordie → No 30 Mine; 1987-12-01 to 1989-03-29; source msha-controller-operator-history
- **controller_controls_operator:** Cline Gordon & Gordie → Double G Coal Company Inc; 1987-12-01 to 1989-03-29; source msha-controller-operator-history
- **operator_operates_mine:** M & C Construction Inc → No 30 Mine; 1989-03-30 to 1989-12-07; source msha-controller-operator-history
- **controller_controls_mine:** Salyers Herman & Don → No 30 Mine; 1989-03-30 to 1989-12-07; source msha-controller-operator-history
- **controller_controls_operator:** Salyers Herman & Don → M & C Construction Inc; 1989-03-30 to 1989-12-07; source msha-controller-operator-history
- **operator_operates_mine:** Double G Coal Company Inc → No 30 Mine; 1989-12-08 to 1992-03-18; source msha-controller-operator-history
- **controller_controls_mine:** Brian  Cline → No 30 Mine; 1989-12-08 to 1992-03-18; source msha-controller-operator-history
- **controller_controls_operator:** Brian  Cline → Double G Coal Company Inc; 1989-12-08 to 1992-03-18; source msha-controller-operator-history
- **operator_operates_mine:** Golden Arrow Mining Inc → No 30 Mine; 1992-03-19 to 1993-03-28; source msha-controller-operator-history
- **controller_controls_mine:** Ramey Roger D → No 30 Mine; 1992-03-19 to 1993-03-28; source msha-controller-operator-history
- **controller_controls_operator:** Ramey Roger D → Golden Arrow Mining Inc; 1992-03-19 to 1993-03-28; source msha-controller-operator-history
- **controller_controls_mine:** Thomas J  Lockhart → No 30 Mine; 1992-11-12 to current/open; source msha-controller-operator-history
- **operator_operates_mine:** J D Mining Company Inc → No 30 Mine; 1993-03-29 to 1994-01-02; source msha-controller-operator-history
- **controller_controls_mine:** Browning Connie → No 30 Mine; 1993-03-29 to 1994-01-02; source msha-controller-operator-history
- **controller_controls_operator:** Browning Connie → J D Mining Company Inc; 1993-03-29 to 1994-01-02; source msha-controller-operator-history
- **operator_operates_mine:** 16 Tons Coal Company Inc → No 30 Mine; 1994-01-03 to 1994-12-14; source msha-controller-operator-history
- **controller_controls_operator:** Thomas J  Lockhart → 16 Tons Coal Company Inc; 1994-01-03 to 1994-12-14; source msha-controller-operator-history
- **controller_controls_mine:** Adkins Robert → No 30 Mine; 1994-01-07 to 1996-01-15; source msha-controller-operator-history
- **operator_operates_mine:** Circle A Mining Inc → No 30 Mine; 1994-12-15 to 1996-01-15; source msha-controller-operator-history
- **controller_controls_operator:** Adkins Robert → Circle A Mining Inc; 1994-12-15 to 1996-01-15; source msha-controller-operator-history
- **operator_operates_mine:** Circle A Mining Inc → No 30 Mine; 1996-01-16 to 1996-08-14; source msha-controller-operator-history
- **controller_controls_mine:** Thompson Ted → No 30 Mine; 1996-01-16 to 1996-08-14; source msha-controller-operator-history
- **controller_controls_operator:** Thompson Ted → Circle A Mining Inc; 1996-01-16 to 1996-08-14; source msha-controller-operator-history
- **operator_operates_mine:** H & R Coal Company Inc → No 30 Mine; 1996-08-15 to 1998-09-14; source msha-controller-operator-history
- **controller_controls_mine:** Simmons Thomas D → No 30 Mine; 1996-08-15 to 1998-09-14; source msha-controller-operator-history
- **controller_controls_operator:** Simmons Thomas D → H & R Coal Company Inc; 1996-08-15 to 1998-09-14; source msha-controller-operator-history
- **operator_operates_mine:** Dixs Creek Mining Company → No 30 Mine; 1998-09-15 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Billy R  Lee → No 30 Mine; 1998-09-15 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Billy R  Lee → Dixs Creek Mining Company; 1998-09-15 to current/open; source msha-controller-operator-history