# Relationship history for MSHA mine 3503716

Current hierarchy: **Levi  McClain; Luke  McClain → Mark Latham Excavation Inc. → Rock Sand Road Pit**

- 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:** Pat  McClain → Rock Sand Road Pit; 2008-12-10 to 2025-12-31; source msha-controller-operator-history
- **operator_operates_mine:** Mark Latham Excavation Inc. → Rock Sand Road Pit; 2009-05-17 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Pat  McClain → Mark Latham Excavation Inc.; 2009-05-17 to 2025-12-31; source msha-controller-operator-history
- **controller_controls_mine:** Luke  McClain et al → Rock Sand Road Pit; 2026-01-01 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Luke  McClain et al → Mark Latham Excavation Inc.; 2026-01-01 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Levi  McClain et al → Mark Latham Excavation Inc.; 2026-01-01 to current/open; source msha-controller-operator-history