# Relationship history for MSHA mine 3608022

Current hierarchy: **Degilio Raymond → Ransom Quarry Inc → Wilkes-Barre Secondary**

- 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

- **controller_controls_mine:** Degilio Raymond → Wilkes-Barre Secondary; 1980-06-01 to current/open; source msha-controller-operator-history
- **operator_operates_mine:** Ransom Quarry Inc → Wilkes-Barre Secondary; 1988-05-01 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Degilio Raymond → Ransom Quarry Inc; 1988-05-01 to current/open; source msha-controller-operator-history