# Relationship history for MSHA mine 3604384

Current hierarchy: **John W  Rich Jr → Waste Management & Processors Inc → Tunnel Ridge Bank #115**

- Valid-time bounds: inclusive, date granularity
- Null end: open-ended in the upstream history row; not independent proof of present control
- Transaction-time observation: 2026-10-17T05:35:58.500035+00:00

## Valid-time edges

- **operator_operates_mine:** B-D Mining Company → Tunnel Ridge Bank #115; 1950-01-01 to 1988-06-23; source msha-controller-operator-history
- **controller_controls_mine:** John W  Rich (Pa) → Tunnel Ridge Bank #115; 1950-01-01 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** John W  Rich (Pa) → B-D Mining Company; 1950-01-01 to 1988-06-23; source msha-controller-operator-history
- **controller_controls_mine:** John W  Rich Jr et al → Tunnel Ridge Bank #115; 1986-05-01 to current/open; source msha-controller-operator-history
- **operator_operates_mine:** Waste Management & Processors Inc → Tunnel Ridge Bank #115; 1988-06-24 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** John W  Rich Jr et al → Waste Management & Processors Inc; 1988-06-24 to current/open; source msha-controller-operator-history