# Relationship history for MSHA mine 1102572

Current hierarchy: **Knickerbocker Roger → Panama Recycling Company → Panama Recycling Company (Culm 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: 2026-10-18T09:31:49.615908+00:00

## Valid-time edges

- **operator_operates_mine:** Panama Recycling Company → Panama Recycling Company (Culm Bank); 1976-10-01 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Knickerbocker Roger → Panama Recycling Company (Culm Bank); 1976-10-01 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Knickerbocker Roger → Panama Recycling Company; 1976-10-01 to current/open; source msha-controller-operator-history