# Relationship history for MSHA mine 1511018

Current hierarchy: **Sexton James O → J O S Coal Inc → Mine #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

- **operator_operates_mine:** H & A Coal Company → Mine #1; 1977-12-01 to 1984-01-11; source msha-controller-operator-history
- **controller_controls_mine:** Anderson Ronald → Mine #1; 1977-12-01 to 1984-01-11; source msha-controller-operator-history
- **controller_controls_operator:** Anderson Ronald → H & A Coal Company; 1977-12-01 to 1984-01-11; source msha-controller-operator-history
- **controller_controls_mine:** Hall Charles D → Mine #1; 1981-09-09 to current/open; source msha-controller-operator-history
- **operator_operates_mine:** Brush Creek Coal Inc → Mine #1; 1984-01-12 to 1987-11-11; source msha-controller-operator-history
- **controller_controls_operator:** Hall Charles D → Brush Creek Coal Inc; 1984-01-12 to 1987-11-11; source msha-controller-operator-history
- **operator_operates_mine:** J O S Coal Inc → Mine #1; 1987-11-12 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Sexton James O → Mine #1; 1987-11-12 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Sexton James O → J O S Coal Inc; 1987-11-12 to current/open; source msha-controller-operator-history