# Relationship history for MSHA mine 3004111

Current hierarchy: **Allen R  Hildreth → Acme Top Soil → Acme Sand Gravel**

- 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:** Allen R  Hildreth → Acme Sand Gravel; 2014-07-31 to current/open; source msha-controller-operator-history
- **operator_operates_mine:** Acme Top Soil → Acme Sand Gravel; 2023-02-27 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Allen R  Hildreth → Acme Top Soil; 2023-02-27 to current/open; source msha-controller-operator-history