# Relationship history for MSHA mine 4602832

Current hierarchy: **Charles Steven  Robinson → Belva Coal Company → No 1 Prep Plant**

- 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:** Belva Coal Company Inc → No 1 Prep Plant; 1950-01-01 to 1977-03-31; source msha-controller-operator-history
- **controller_controls_mine:** Impco-International Mining & Petroleum Co → No 1 Prep Plant; 1950-01-01 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Impco-International Mining & Petroleum Co → Belva Coal Company Inc; 1950-01-01 to 1977-03-31; source msha-controller-operator-history
- **controller_controls_mine:** Reading & Bates Corp → No 1 Prep Plant; 1977-02-01 to current/open; source msha-controller-operator-history
- **operator_operates_mine:** Belva Coal Company Inc → No 1 Prep Plant; 1977-04-01 to 1986-06-08; source msha-controller-operator-history
- **controller_controls_operator:** Reading & Bates Corp → Belva Coal Company Inc; 1977-04-01 to 1986-06-08; source msha-controller-operator-history
- **operator_operates_mine:** Sugar Leaf Processors Inc → No 1 Prep Plant; 1986-06-09 to 1989-04-20; source msha-controller-operator-history
- **controller_controls_mine:** James F  Vance et al → No 1 Prep Plant; 1986-06-09 to 1989-04-20; source msha-controller-operator-history
- **controller_controls_operator:** James F  Vance et al → Sugar Leaf Processors Inc; 1986-06-09 to 1989-04-20; source msha-controller-operator-history
- **operator_operates_mine:** H & M Processing Inc → No 1 Prep Plant; 1989-04-21 to 1991-01-08; source msha-controller-operator-history
- **controller_controls_mine:** James A  Miller → No 1 Prep Plant; 1989-04-21 to 1991-01-08; source msha-controller-operator-history
- **controller_controls_operator:** James A  Miller → H & M Processing Inc; 1989-04-21 to 1991-01-08; source msha-controller-operator-history
- **operator_operates_mine:** H & M Processing Inc → No 1 Prep Plant; 1991-01-09 to 1992-04-02; source msha-controller-operator-history
- **controller_controls_mine:** Charles William M Jr → No 1 Prep Plant; 1991-01-09 to 1992-04-02; source msha-controller-operator-history
- **controller_controls_operator:** Charles William M Jr → H & M Processing Inc; 1991-01-09 to 1992-04-02; source msha-controller-operator-history
- **controller_controls_mine:** Paul J  Sturgill → No 1 Prep Plant; 1991-10-01 to current/open; source msha-controller-operator-history
- **operator_operates_mine:** Madison Branch Management Inc → No 1 Prep Plant; 1992-04-03 to 1996-06-19; source msha-controller-operator-history
- **controller_controls_operator:** Paul J  Sturgill → Madison Branch Management Inc; 1992-04-03 to 1996-06-19; source msha-controller-operator-history
- **operator_operates_mine:** Belva Coal Company → No 1 Prep Plant; 1996-06-20 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Charles Steven  Robinson → No 1 Prep Plant; 1996-06-20 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Charles Steven  Robinson → Belva Coal Company; 1996-06-20 to current/open; source msha-controller-operator-history