# Relationship history for MSHA mine 3600104

Current hierarchy: **Pioneer International Ltd → Pioneer Mid-Atlantic Inc → BAGGALEY 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:** Eidemiller Enterprises Inc → BAGGALEY QUARRY; 1950-01-01 to 1980-10-01; source msha-controller-operator-history
- **controller_controls_mine:** Eidemiller Adam Inc → BAGGALEY QUARRY; 1950-01-01 to 1980-10-19; source msha-controller-operator-history
- **controller_controls_operator:** Eidemiller Adam Inc → Eidemiller Enterprises Inc; 1950-01-01 to 1980-10-01; source msha-controller-operator-history
- **controller_controls_mine:** F R G Industries Inc → BAGGALEY QUARRY; 1979-01-01 to 1989-01-15; source msha-controller-operator-history
- **operator_operates_mine:** Davison Stone Company → BAGGALEY QUARRY; 1980-10-02 to 1989-01-15; source msha-controller-operator-history
- **controller_controls_operator:** F R G Industries Inc → Davison Stone Company; 1980-10-02 to 1989-01-15; source msha-controller-operator-history
- **operator_operates_mine:** Pioneer Mid-Atlantic Inc → BAGGALEY QUARRY; 1989-01-16 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Pioneer International Ltd → BAGGALEY QUARRY; 1989-01-16 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Pioneer International Ltd → Pioneer Mid-Atlantic Inc; 1989-01-16 to current/open; source msha-controller-operator-history