# Relationship history for MSHA mine 3301384

Current hierarchy: **Jacqueline J  Alf; James P  Jurgensen II; Jason R  Jurgensen → Walls Materials → Walls Materials Plant 2**

- 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:** American Aggregates Corp → Walls Materials Plant 2; 1950-01-01 to 1987-02-28; source msha-controller-operator-history
- **controller_controls_mine:** American Aggregates Corp → Walls Materials Plant 2; 1950-01-01 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** American Aggregates Corp → American Aggregates Corp; 1950-01-01 to 1987-02-28; source msha-controller-operator-history
- **controller_controls_mine:** Consolidated Gold Fields Limited → Walls Materials Plant 2; 1987-02-04 to current/open; source msha-controller-operator-history
- **operator_operates_mine:** American Aggregates Corp → Walls Materials Plant 2; 1987-03-01 to 1989-08-09; source msha-controller-operator-history
- **controller_controls_operator:** Consolidated Gold Fields Limited → American Aggregates Corp; 1987-03-01 to 1989-08-09; source msha-controller-operator-history
- **controller_controls_mine:** Hanson PLC → Walls Materials Plant 2; 1989-03-10 to 1990-02-01; source msha-controller-operator-history
- **operator_operates_mine:** American Aggregates Corp → Walls Materials Plant 2; 1989-08-10 to 1990-02-01; source msha-controller-operator-history
- **controller_controls_operator:** Hanson PLC → American Aggregates Corp; 1989-08-10 to 1990-02-01; source msha-controller-operator-history
- **operator_operates_mine:** American Aggregates Corp → Walls Materials Plant 2; 1990-02-02 to 1997-04-01; source msha-controller-operator-history
- **controller_controls_mine:** CSR Ltd → Walls Materials Plant 2; 1990-02-02 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** CSR Ltd → American Aggregates Corp; 1990-02-02 to 1997-04-01; source msha-controller-operator-history
- **controller_controls_mine:** James P  Jurgensen → Walls Materials Plant 2; 1992-09-30 to 2024-10-02; source msha-controller-operator-history
- **operator_operates_mine:** Walls Materials → Walls Materials Plant 2; 1997-04-02 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** James P  Jurgensen → Walls Materials; 1997-04-02 to 2024-10-02; source msha-controller-operator-history
- **controller_controls_mine:** Jacqueline J  Alf et al → Walls Materials Plant 2; 2024-10-03 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Jacqueline J  Alf et al → Walls Materials; 2024-10-03 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Jason R  Jurgensen et al → Walls Materials; 2024-10-03 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** James P  Jurgensen II et al → Walls Materials; 2024-10-03 to current/open; source msha-controller-operator-history