# Relationship history for MSHA mine 3602656

Current hierarchy: **Klapak Michael S → Ladon Coal Corp → Arcadia Strip**

- 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:** Arcadia Company Inc → Arcadia Strip; 1950-01-01 to 1980-12-08; source msha-controller-operator-history
- **controller_controls_mine:** Prushnok Coal Company Inc → Arcadia Strip; 1950-01-01 to 1980-12-08; source msha-controller-operator-history
- **controller_controls_operator:** Prushnok Coal Company Inc → Arcadia Company Inc; 1950-01-01 to 1980-12-08; source msha-controller-operator-history
- **operator_operates_mine:** Arcadia Company Inc → Arcadia Strip; 1980-12-09 to 1982-04-12; source msha-controller-operator-history
- **controller_controls_mine:** Pennsylvania Power & Light Company → Arcadia Strip; 1980-12-09 to 1982-04-12; source msha-controller-operator-history
- **controller_controls_operator:** Pennsylvania Power & Light Company → Arcadia Company Inc; 1980-12-09 to 1982-04-12; source msha-controller-operator-history
- **operator_operates_mine:** Ladon Coal Corp → Arcadia Strip; 1982-04-13 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Klapak Michael S → Arcadia Strip; 1982-04-13 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Klapak Michael S → Ladon Coal Corp; 1982-04-13 to current/open; source msha-controller-operator-history