# Relationship history for MSHA mine 3300357

Current hierarchy: **Theodore H  Heitsche; Stacy A  Heitsche → Heitsche North Shore Stone Quarry LLC → Heitsche North Shore Stone Quarry LLC**

- 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:** Lintner & Luft Inc → Heitsche North Shore Stone Quarry LLC; 1950-01-01 to 1985-09-10; source msha-controller-operator-history
- **controller_controls_mine:** Harry R  Luft → Heitsche North Shore Stone Quarry LLC; 1950-01-01 to 1985-09-10; source msha-controller-operator-history
- **controller_controls_operator:** Harry R  Luft → Lintner & Luft Inc; 1950-01-01 to 1985-09-10; source msha-controller-operator-history
- **operator_operates_mine:** North Shore Stone Quarries Inc → Heitsche North Shore Stone Quarry LLC; 1985-09-11 to 2013-10-15; source msha-controller-operator-history
- **controller_controls_mine:** Clifford  Hammond → Heitsche North Shore Stone Quarry LLC; 1985-09-11 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Clifford  Hammond → North Shore Stone Quarries Inc; 1985-09-11 to 2013-10-15; source msha-controller-operator-history
- **operator_operates_mine:** Heitsche North Shore Stone Quarry LLC → Heitsche North Shore Stone Quarry LLC; 2013-10-16 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Stacy A  Heitsche et al → Heitsche North Shore Stone Quarry LLC; 2013-10-16 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Stacy A  Heitsche et al → Heitsche North Shore Stone Quarry LLC; 2013-10-16 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Theodore H  Heitsche et al → Heitsche North Shore Stone Quarry LLC; 2013-10-16 to current/open; source msha-controller-operator-history