# Relationship history for MSHA mine 4105734

Current hierarchy: **Rachel  Schuler → Heartland Quarries, LLC → Pit 4 LaGrange**

- 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

- **controller_controls_mine:** John W  Schuler → Pit 4 LaGrange; 2014-06-11 to 2024-04-23; source msha-controller-operator-history
- **operator_operates_mine:** Heartland Quarries, LLC → Pit 4 LaGrange; 2024-04-18 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** John W  Schuler → Heartland Quarries, LLC; 2024-04-18 to 2024-04-23; source msha-controller-operator-history
- **controller_controls_mine:** Rachel  Schuler → Pit 4 LaGrange; 2024-04-24 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Rachel  Schuler → Heartland Quarries, LLC; 2024-04-24 to current/open; source msha-controller-operator-history