# Relationship history for MSHA mine 2002666

Current hierarchy: **Great Lakes Aggregates LLC → Rockwood Quarry LLC → Rockwood Quarry LLC**

- 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

- **controller_controls_mine:** Daniel W  Holloway → Rockwood Quarry LLC; 1950-01-01 to current/open; source msha-controller-operator-history
- **operator_operates_mine:** Rockwood Stone Inc → Rockwood Quarry LLC; 1981-07-01 to 1998-07-09; source msha-controller-operator-history
- **controller_controls_operator:** Daniel W  Holloway → Rockwood Stone Inc; 1981-07-01 to 1998-07-09; source msha-controller-operator-history
- **operator_operates_mine:** Rockwood Quarry LLC → Rockwood Quarry LLC; 1998-07-10 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Great Lakes Aggregates LLC → Rockwood Quarry LLC; 1998-07-10 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Great Lakes Aggregates LLC → Rockwood Quarry LLC; 1998-07-10 to current/open; source msha-controller-operator-history