# Relationship history for MSHA mine 1000336

Current hierarchy: **Cal D  Low; Clint B  Low → Low'S Sand & Gravel → Low'S Wash 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: 2026-10-17T05:35:58.500035+00:00

## Valid-time edges

- **operator_operates_mine:** Low'S Sand & Gravel → Low'S Wash Plant; 1950-01-01 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Clint B  Low et al → Low'S Wash Plant; 1950-01-01 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Clint B  Low et al → Low'S Sand & Gravel; 1950-01-01 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Cal D  Low et al → Low'S Sand & Gravel; 1950-01-01 to current/open; source msha-controller-operator-history