# Relationship history for MSHA mine 0504988

Current hierarchy: **John Eugene  Holliday; Matthew  Sprague → United Stoneworks LLC → Red Quarry**

- 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

- **operator_operates_mine:** United Stoneworks LLC → Red Quarry; 2011-06-28 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** John Eugene  Holliday et al → Red Quarry; 2011-06-28 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** John Eugene  Holliday et al → United Stoneworks LLC; 2011-06-28 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Matthew  Sprague et al → United Stoneworks LLC; 2011-06-28 to current/open; source msha-controller-operator-history