# Relationship history for MSHA mine 2800027

Current hierarchy: **Gianetti Peter M → Pattenburg Quarry Company Inc → Pattenburg Quarry Company Incorporated**

- 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:** Anthony Ferrante & Sons Inc → Pattenburg Quarry Company Incorporated; 1950-01-01 to 1982-12-20; source msha-controller-operator-history
- **controller_controls_mine:** Ferrante Mary → Pattenburg Quarry Company Incorporated; 1950-01-01 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Ferrante Mary → Anthony Ferrante & Sons Inc; 1950-01-01 to 1982-12-20; source msha-controller-operator-history
- **operator_operates_mine:** Rocklen Inc → Pattenburg Quarry Company Incorporated; 1982-12-21 to 1988-05-18; source msha-controller-operator-history
- **controller_controls_mine:** Frank M  Lentine et al → Pattenburg Quarry Company Incorporated; 1982-12-21 to 1988-05-18; source msha-controller-operator-history
- **controller_controls_operator:** Frank M  Lentine et al → Rocklen Inc; 1982-12-21 to 1988-05-18; source msha-controller-operator-history
- **operator_operates_mine:** Pattenburg Quarry Company Inc → Pattenburg Quarry Company Incorporated; 1988-05-19 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Gianetti Peter M → Pattenburg Quarry Company Incorporated; 1988-05-19 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Gianetti Peter M → Pattenburg Quarry Company Inc; 1988-05-19 to current/open; source msha-controller-operator-history