# Relationship history for MSHA mine 4503861

Current hierarchy: **Walt  Miles → Miles Sand & Gravel → Miracle Mine**

- 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:** Walt  Miles et al → Miracle Mine; 1950-01-01 to current/open; source msha-controller-operator-history
- **operator_operates_mine:** Miles Sand & Gravel → Miracle Mine; 2025-12-19 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Walt  Miles et al → Miles Sand & Gravel; 2025-12-19 to current/open; source msha-controller-operator-history