# Relationship history for MSHA mine 1700632

Current hierarchy: **Joseph  Vital; Margaret  Vital → MAPLECREST SAND & GRAVEL → MAPLECREST 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

- **operator_operates_mine:** MAPLECREST SAND & GRAVEL → MAPLECREST SAND & GRAVEL; 1996-06-01 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Margaret  Vital et al → MAPLECREST SAND & GRAVEL; 1996-06-01 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Margaret  Vital et al → MAPLECREST SAND & GRAVEL; 1996-06-01 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Joseph  Vital et al → MAPLECREST SAND & GRAVEL; 1996-06-01 to current/open; source msha-controller-operator-history