# Relationship history for MSHA mine 0900683

Current hierarchy: **Robert E  Paul → Quarry Enterprises Inc → Quarry Enterprises 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: 2026-10-13T11:19:05.459773+00:00

## Valid-time edges

- **operator_operates_mine:** Peppers Granite Company Inc → Quarry Enterprises Incorporated; 1950-01-01 to 1979-09-30; source msha-controller-operator-history
- **controller_controls_mine:** Kirk  Peppers → Quarry Enterprises Incorporated; 1950-01-01 to 1989-08-24; source msha-controller-operator-history
- **controller_controls_operator:** Kirk  Peppers → Peppers Granite Company Inc; 1950-01-01 to 1979-09-30; source msha-controller-operator-history
- **operator_operates_mine:** Quarry Operators Inc → Quarry Enterprises Incorporated; 1979-10-01 to 1983-06-20; source msha-controller-operator-history
- **controller_controls_mine:** Roger  Guest → Quarry Enterprises Incorporated; 1979-10-01 to 1983-06-20; source msha-controller-operator-history
- **controller_controls_operator:** Roger  Guest → Quarry Operators Inc; 1979-10-01 to 1983-06-20; source msha-controller-operator-history
- **operator_operates_mine:** Gran-Quartz Trading Inc → Quarry Enterprises Incorporated; 1983-06-21 to 1984-07-22; source msha-controller-operator-history
- **controller_controls_mine:** Peter T  De Kok → Quarry Enterprises Incorporated; 1983-06-21 to 1984-07-22; source msha-controller-operator-history
- **controller_controls_operator:** Peter T  De Kok → Gran-Quartz Trading Inc; 1983-06-21 to 1984-07-22; source msha-controller-operator-history
- **operator_operates_mine:** Quarry Operators → Quarry Enterprises Incorporated; 1984-07-23 to 1985-02-28; source msha-controller-operator-history
- **controller_controls_mine:** Peter T  De Kok et al → Quarry Enterprises Incorporated; 1984-07-23 to 1985-02-28; source msha-controller-operator-history
- **controller_controls_operator:** Peter T  De Kok et al → Quarry Operators; 1984-07-23 to 1985-02-28; source msha-controller-operator-history
- **operator_operates_mine:** Quarry Enterprises Inc → Quarry Enterprises Incorporated; 1985-03-01 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Robert E  Paul → Quarry Enterprises Incorporated; 1985-03-01 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Robert E  Paul → Quarry Enterprises Inc; 1985-03-01 to current/open; source msha-controller-operator-history