# Relationship history for MSHA mine 2402472

Current hierarchy: **Riley  Mytty → Western Excavating → Monroc/Hunton**

- Valid-time bounds: inclusive, date granularity
- Null end: open-ended in the upstream history row; not independent proof of present control
- Transaction-time observation: 2026-10-17T05:35:58.500035+00:00

## Valid-time edges

- **controller_controls_mine:** Kevin W  Mytty → Monroc/Hunton; 2005-01-04 to 2025-03-31; source msha-controller-operator-history
- **operator_operates_mine:** Western Excavating → Monroc/Hunton; 2007-04-01 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Kevin W  Mytty → Western Excavating; 2007-04-01 to 2025-03-31; source msha-controller-operator-history
- **controller_controls_mine:** Riley  Mytty → Monroc/Hunton; 2025-04-01 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Riley  Mytty → Western Excavating; 2025-04-01 to current/open; source msha-controller-operator-history