# Relationship history for MSHA mine 3503427

Current hierarchy: **Lucas Roger → Monroe Brick & Tile → MONROE YARD CLAY**

- 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:** Monroe Brick & Tile → MONROE YARD CLAY; 1996-03-01 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Lucas Roger → MONROE YARD CLAY; 1996-03-01 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Lucas Roger → Monroe Brick & Tile; 1996-03-01 to current/open; source msha-controller-operator-history