# Relationship history for MSHA mine 4300284

Current hierarchy: **Eric  Baker → Baker Slate Inc → SOUTH POULTNEY**

- 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:** Roberts Slate Company Inc → SOUTH POULTNEY; 1950-01-01 to 1986-03-06; source msha-controller-operator-history
- **controller_controls_mine:** Ronald A  Roberts → SOUTH POULTNEY; 1950-01-01 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Ronald A  Roberts → Roberts Slate Company Inc; 1950-01-01 to 1986-03-06; source msha-controller-operator-history
- **controller_controls_mine:** Alfred Mc Alpine Inc → SOUTH POULTNEY; 1986-03-04 to 2008-01-15; source msha-controller-operator-history
- **operator_operates_mine:** Hilltop Slate Inc → SOUTH POULTNEY; 1986-03-07 to 2000-03-12; source msha-controller-operator-history
- **controller_controls_operator:** Alfred Mc Alpine Inc → Hilltop Slate Inc; 1986-03-07 to 2000-03-12; source msha-controller-operator-history
- **controller_controls_mine:** Eric  Baker → SOUTH POULTNEY; 1999-09-01 to current/open; source msha-controller-operator-history
- **operator_operates_mine:** Ramey Slate Company → SOUTH POULTNEY; 2000-03-13 to 2001-04-08; source msha-controller-operator-history
- **controller_controls_mine:** Thomas J  Zovistoski Jr → SOUTH POULTNEY; 2000-03-13 to 2001-04-08; source msha-controller-operator-history
- **controller_controls_operator:** Thomas J  Zovistoski Jr → Ramey Slate Company; 2000-03-13 to 2001-04-08; source msha-controller-operator-history
- **operator_operates_mine:** Baker Slate Inc → SOUTH POULTNEY; 2001-04-09 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Eric  Baker → Baker Slate Inc; 2001-04-09 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Northeast Slate Incorporated → SOUTH POULTNEY; 2008-01-16 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Northeast Slate Incorporated → Hilltop Slate Inc; 2008-01-16 to 2000-03-12; source msha-controller-operator-history