# Relationship history for MSHA mine 2402166

Current hierarchy: **Dick  Marick → Lolo Sand & Gravel → LOLO SAND & GRAVEL**

- 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

- **operator_operates_mine:** Lolo Sand & Gravel → LOLO SAND & GRAVEL; 1999-03-01 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Dick  Marick → LOLO SAND & GRAVEL; 1999-03-01 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Dick  Marick → Lolo Sand & Gravel; 1999-03-01 to current/open; source msha-controller-operator-history