# Relationship history for MSHA mine 3101516

Current hierarchy: **Philipp Holzmann A G → Rea Construction Company → Iredell County Mines**

- 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

- **operator_operates_mine:** Rea Construction Company → Iredell County Mines; 1950-01-01 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Philipp Holzmann A G → Iredell County Mines; 1950-01-01 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Philipp Holzmann A G → Rea Construction Company; 1950-01-01 to current/open; source msha-controller-operator-history