# Relationship history for MSHA mine 3610297

Current hierarchy: **John W  Rich Jr → Waste Management Processors, Inc. → Mahanoy Plane Bank**

- 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

- **controller_controls_mine:** John W  Rich Jr et al → Mahanoy Plane Bank; 1986-05-01 to current/open; source msha-controller-operator-history
- **operator_operates_mine:** Waste Management Processors, Inc. → Mahanoy Plane Bank; 2019-07-18 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** John W  Rich Jr et al → Waste Management Processors, Inc.; 2019-07-18 to current/open; source msha-controller-operator-history