# Relationship history for MSHA mine 0405439

Current hierarchy: **Anthony J  Alegre → Ramrock Leasing & Equipment Company Inc → RAMROCK-BRANDT ROAD**

- 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:** Ramrock Leasing & Equipment Company Inc → RAMROCK-BRANDT ROAD; 2000-05-01 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Anthony J  Alegre et al → RAMROCK-BRANDT ROAD; 2000-05-01 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Anthony J  Alegre et al → Ramrock Leasing & Equipment Company Inc; 2000-05-01 to current/open; source msha-controller-operator-history