# Relationship history for MSHA mine 3401976

Current hierarchy: **Loren D Frederick → Heartland Stone LLC → R #1**

- 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

- **operator_operates_mine:** Heartland Stone LLC → R #1; 2005-08-15 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Loren D Frederick et al → R #1; 2005-08-15 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Loren D Frederick et al → Heartland Stone LLC; 2005-08-15 to current/open; source msha-controller-operator-history