# Relationship history for MSHA mine 4201526

Current hierarchy: **Jon  Rhine → Interpace Corp → Harrisville Mine & Plant**

- 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:** Jon  Rhine → Harrisville Mine & Plant; 1950-01-01 to current/open; source msha-controller-operator-history
- **operator_operates_mine:** Interpace Corp → Harrisville Mine & Plant; 1978-03-09 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Jon  Rhine → Interpace Corp; 1978-03-09 to current/open; source msha-controller-operator-history