# Relationship history for MSHA mine 4702504

Current hierarchy: **Monnot Ed → Ed Monnot-Operator → Monnot 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:** Leroy Geiger-Operator → Monnot Quarry; 1950-01-01 to 1980-06-23; source msha-controller-operator-history
- **controller_controls_mine:** Geiger Leroy → Monnot Quarry; 1950-01-01 to 1980-06-23; source msha-controller-operator-history
- **controller_controls_operator:** Geiger Leroy → Leroy Geiger-Operator; 1950-01-01 to 1980-06-23; source msha-controller-operator-history
- **operator_operates_mine:** Ed Monnot-Operator → Monnot Quarry; 1980-06-24 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Monnot Ed → Monnot Quarry; 1980-06-24 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Monnot Ed → Ed Monnot-Operator; 1980-06-24 to current/open; source msha-controller-operator-history