# Relationship history for MSHA mine 4000235

Current hierarchy: **Roger E  West → Stoney Ridge Coal Company Inc → #3**

- 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:** Deep Hollow Coal Company → #3; 1950-01-01 to 1976-09-14; source msha-controller-operator-history
- **controller_controls_mine:** Phillips Jonas → #3; 1950-01-01 to 1976-09-14; source msha-controller-operator-history
- **controller_controls_operator:** Phillips Jonas → Deep Hollow Coal Company; 1950-01-01 to 1976-09-14; source msha-controller-operator-history
- **operator_operates_mine:** A B D & G Coal Company Inc → #3; 1976-09-15 to 1989-06-04; source msha-controller-operator-history
- **controller_controls_mine:** Aslinger Abra → #3; 1976-09-15 to 1989-06-04; source msha-controller-operator-history
- **controller_controls_operator:** Aslinger Abra → A B D & G Coal Company Inc; 1976-09-15 to 1989-06-04; source msha-controller-operator-history
- **operator_operates_mine:** Stoney Ridge Coal Company Inc → #3; 1989-06-05 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Roger E  West → #3; 1989-06-05 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Roger E  West → Stoney Ridge Coal Company Inc; 1989-06-05 to current/open; source msha-controller-operator-history