# Relationship history for MSHA mine 2103752

Current hierarchy: **Tom J  Fridgen → Fridgen Ex & Tiling → Rental 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

- **operator_operates_mine:** Fridgen Ex & Tiling → Rental Plant; 2012-03-14 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Tom J  Fridgen → Rental Plant; 2012-03-14 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Tom J  Fridgen → Fridgen Ex & Tiling; 2012-03-14 to current/open; source msha-controller-operator-history