# Relationship history for MSHA mine 3606608

Current hierarchy: **Reese Richard L & Oliver P Jr--Robert J Schultz → O R R Coal Company → Winburne #1 Mine**

- 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:** O R R Coal Company → Winburne #1 Mine; 1978-03-01 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Reese Richard L & Oliver P Jr--Robert J Schultz → Winburne #1 Mine; 1978-03-01 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Reese Richard L & Oliver P Jr--Robert J Schultz → O R R Coal Company; 1978-03-01 to current/open; source msha-controller-operator-history