# Relationship history for MSHA mine 4101096

Current hierarchy: **David G Casares → Casares Sand Pit → Casares Sand Pit**

- 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:** Herff Harris → Casares Sand Pit; 1950-01-01 to 1993-04-17; source msha-controller-operator-history
- **controller_controls_mine:** Harris Herff → Casares Sand Pit; 1950-01-01 to 1993-04-17; source msha-controller-operator-history
- **controller_controls_operator:** Harris Herff → Herff Harris; 1950-01-01 to 1993-04-17; source msha-controller-operator-history
- **operator_operates_mine:** Casares Sand Pit → Casares Sand Pit; 1993-04-18 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** David G Casares → Casares Sand Pit; 1993-04-18 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** David G Casares → Casares Sand Pit; 1993-04-18 to current/open; source msha-controller-operator-history