# Relationship history for MSHA mine 3606861

Current hierarchy: **Brian R  Rich → Schuylkill Reclamation Corporation → Park Place 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:** Di Casimirro Ettore & Eileen → Park Place Bank; 1950-01-01 to current/open; source msha-controller-operator-history
- **operator_operates_mine:** Skytop Contracting Company Inc → Park Place Bank; 1979-07-01 to 1985-07-08; source msha-controller-operator-history
- **controller_controls_operator:** Di Casimirro Ettore & Eileen → Skytop Contracting Company Inc; 1979-07-01 to 1985-07-08; source msha-controller-operator-history
- **controller_controls_mine:** Vincent  Guarna et al → Park Place Bank; 1985-01-01 to current/open; source msha-controller-operator-history
- **operator_operates_mine:** Atlas Coal Sales Inc → Park Place Bank; 1985-07-09 to 2023-06-18; source msha-controller-operator-history
- **controller_controls_operator:** Vincent  Guarna et al → Atlas Coal Sales Inc; 1985-07-09 to 2023-06-18; source msha-controller-operator-history
- **controller_controls_operator:** Michael  Guarna et al → Atlas Coal Sales Inc; 1985-07-09 to 2023-06-18; source msha-controller-operator-history
- **controller_controls_mine:** Brian R  Rich → Park Place Bank; 1986-01-14 to current/open; source msha-controller-operator-history
- **operator_operates_mine:** Schuylkill Reclamation Corporation → Park Place Bank; 2023-06-19 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Brian R  Rich → Schuylkill Reclamation Corporation; 2023-06-19 to current/open; source msha-controller-operator-history