# Relationship history for MSHA mine 0301861

Current hierarchy: **Ben  Baldwin; Billy C  Baldwin; Brandon  Baldwin → Rock-It Natural Stone → Hartford #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

- **controller_controls_mine:** Billy D  Baldwin → Hartford #1; 2001-02-01 to 2024-01-22; source msha-controller-operator-history
- **operator_operates_mine:** Rock-It Natural Stone → Hartford #1; 2002-01-14 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Billy D  Baldwin → Rock-It Natural Stone; 2002-01-14 to 2024-01-22; source msha-controller-operator-history
- **controller_controls_mine:** Ben  Baldwin et al → Hartford #1; 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
- **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:** Brandon  Baldwin et al → Rock-It Natural Stone; 2024-01-23 to current/open; source msha-controller-operator-history