# Relationship history for MSHA mine 2001189

Current hierarchy: **Edward C  Levy Jr → Specification Stone Products → Long Lake Avenue 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:** Straits Aggregate Inc → Long Lake Avenue Quarry; 1950-01-01 to 1986-08-14; source msha-controller-operator-history
- **controller_controls_mine:** Charles A  Pinkerton III → Long Lake Avenue Quarry; 1950-01-01 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Charles A  Pinkerton III → Straits Aggregate Inc; 1950-01-01 to 1986-08-14; source msha-controller-operator-history
- **controller_controls_mine:** Roger R  Glawe → Long Lake Avenue Quarry; 1985-08-01 to current/open; source msha-controller-operator-history
- **operator_operates_mine:** Specification Stone Products Inc → Long Lake Avenue Quarry; 1986-08-15 to 2009-08-31; source msha-controller-operator-history
- **controller_controls_operator:** Roger R  Glawe → Specification Stone Products Inc; 1986-08-15 to 2009-08-31; source msha-controller-operator-history
- **operator_operates_mine:** Specification Stone Products → Long Lake Avenue Quarry; 2009-09-01 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Edward C  Levy Jr et al → Long Lake Avenue Quarry; 2009-09-01 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Edward C  Levy Jr et al → Specification Stone Products; 2009-09-01 to current/open; source msha-controller-operator-history