# Relationship history for MSHA mine 4503698

Current hierarchy: **Robert R  Lloyd → Lloyd Enterprises, Inc. → Maytown 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

- **controller_controls_mine:** Robert R  Lloyd → Maytown Sand & Gravel; 1950-01-01 to current/open; source msha-controller-operator-history
- **operator_operates_mine:** Lloyd Enterprises, Inc. → Maytown Sand & Gravel; 2011-12-01 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Robert R  Lloyd → Lloyd Enterprises, Inc.; 2011-12-01 to current/open; source msha-controller-operator-history