# Relationship history for MSHA mine 1101703

Current hierarchy: **Peacock Don → Quality Sand Inc → Quality Sand Incorporated #2**

- 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:** Quality Sand Inc → Quality Sand Incorporated #2; 1950-01-01 to 1993-06-09; source msha-controller-operator-history
- **controller_controls_mine:** Cletus  Lischer → Quality Sand Incorporated #2; 1950-01-01 to 1993-06-09; source msha-controller-operator-history
- **controller_controls_operator:** Cletus  Lischer → Quality Sand Inc; 1950-01-01 to 1993-06-09; source msha-controller-operator-history
- **operator_operates_mine:** Quality Sand Inc → Quality Sand Incorporated #2; 1993-06-10 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Peacock Don → Quality Sand Incorporated #2; 1993-06-10 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Peacock Don → Quality Sand Inc; 1993-06-10 to current/open; source msha-controller-operator-history