# Relationship history for MSHA mine 0100644

Current hierarchy: **Darlene  Garner Abts → Oneonta Stone Quarries, Inc → Oneonta 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: 2026-10-17T05:35:58.500035+00:00

## Valid-time edges

- **operator_operates_mine:** Oneonta Stone Co → Oneonta Quarry; 1950-01-01 to 1991-03-24; source msha-controller-operator-history
- **controller_controls_mine:** Oneonta Stone Co → Oneonta Quarry; 1950-01-01 to 1991-03-24; source msha-controller-operator-history
- **controller_controls_operator:** Oneonta Stone Co → Oneonta Stone Co; 1950-01-01 to 1991-03-24; source msha-controller-operator-history
- **operator_operates_mine:** Oneonta Stone Quarries, Inc → Oneonta Quarry; 1991-03-25 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Darlene  Garner Abts → Oneonta Quarry; 1991-03-25 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Darlene  Garner Abts → Oneonta Stone Quarries, Inc; 1991-03-25 to current/open; source msha-controller-operator-history