# Relationship history for MSHA mine 3101965

Current hierarchy: **Ronnie G  Kirkpatrick Jr → G S Materials Inc → SAND PLANT**

- 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

- **controller_controls_mine:** Willard  Formyduval → SAND PLANT; 1950-01-01 to current/open; source msha-controller-operator-history
- **operator_operates_mine:** Aberdeen Sand & Gravel Company Inc → SAND PLANT; 1984-04-01 to 1986-11-06; source msha-controller-operator-history
- **controller_controls_operator:** Willard  Formyduval → Aberdeen Sand & Gravel Company Inc; 1984-04-01 to 1986-11-06; source msha-controller-operator-history
- **controller_controls_mine:** R G  Kirkpatrick Sr. → SAND PLANT; 1986-01-01 to 2018-09-16; source msha-controller-operator-history
- **operator_operates_mine:** Aberdeen Sand & Gravel Company Inc → SAND PLANT; 1986-11-07 to 1992-03-01; source msha-controller-operator-history
- **controller_controls_mine:** Paul K  Craig  et al → SAND PLANT; 1986-11-07 to 1992-03-01; source msha-controller-operator-history
- **controller_controls_operator:** Paul K  Craig  et al → Aberdeen Sand & Gravel Company Inc; 1986-11-07 to 1992-03-01; source msha-controller-operator-history
- **operator_operates_mine:** Ccc Sand & Gravel Inc → SAND PLANT; 1992-03-02 to 1992-08-10; source msha-controller-operator-history
- **controller_controls_mine:** Thomas E  Chandler → SAND PLANT; 1992-03-02 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Thomas E  Chandler → Ccc Sand & Gravel Inc; 1992-03-02 to 1992-08-10; source msha-controller-operator-history
- **operator_operates_mine:** G S Materials Inc → SAND PLANT; 1992-08-11 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** R G  Kirkpatrick Sr. → G S Materials Inc; 1992-08-11 to 2018-09-16; source msha-controller-operator-history
- **controller_controls_mine:** Ronnie G  Kirkpatrick Jr → SAND PLANT; 2018-09-17 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Ronnie G  Kirkpatrick Jr → G S Materials Inc; 2018-09-17 to current/open; source msha-controller-operator-history