# Relationship history for MSHA mine 2003632

Current hierarchy: **Gary A Moyle → Valley View Quarry → Great Lakes Mineral #645 Rip Rap Plant**

- Valid-time bounds: inclusive, date granularity
- Null end: open-ended in the upstream history row; not independent proof of present control
- Transaction-time observation: 2026-10-18T09:31:49.615908+00:00

## Valid-time edges

- **controller_controls_mine:** Gary A Moyle → Great Lakes Mineral #645 Rip Rap Plant; 2015-04-23 to current/open; source msha-controller-operator-history
- **operator_operates_mine:** Valley View Quarry → Great Lakes Mineral #645 Rip Rap Plant; 2022-05-24 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Gary A Moyle → Valley View Quarry; 2022-05-24 to current/open; source msha-controller-operator-history