# Relationship history for MSHA mine 3401856

Current hierarchy: **Ben  Baldwin; Billy C  Baldwin; Brandon  Baldwin → Rock-It Natural Stone → WARD #1, BIG HILL #1, & #2**

- 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:** Rock-It Natural Stone → WARD #1, BIG HILL #1, & #2; 2001-02-01 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Billy D  Baldwin → WARD #1, BIG HILL #1, & #2; 2001-02-01 to 2024-01-22; source msha-controller-operator-history
- **controller_controls_operator:** Billy D  Baldwin → Rock-It Natural Stone; 2001-02-01 to 2024-01-22; source msha-controller-operator-history
- **controller_controls_mine:** Brandon  Baldwin et al → WARD #1, BIG HILL #1, & #2; 2024-01-23 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Brandon  Baldwin et al → Rock-It Natural Stone; 2024-01-23 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Billy C  Baldwin et al → Rock-It Natural Stone; 2024-01-23 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Ben  Baldwin et al → Rock-It Natural Stone; 2024-01-23 to current/open; source msha-controller-operator-history