# Relationship history for MSHA mine 3102011

Current hierarchy: **Quikrete Holdings Inc. → American Materials Company,LLC → IVANHOE PIT**

- 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

- **controller_controls_mine:** Summit Materials LLC → IVANHOE PIT; 1950-01-01 to 2022-05-13; source msha-controller-operator-history
- **controller_controls_mine:** Paul K  Craig  et al → IVANHOE PIT; 1986-11-07 to 1992-03-01; source msha-controller-operator-history
- **operator_operates_mine:** Aberdeen Sand & Gravel Company Inc → IVANHOE PIT; 1987-09-01 to 1992-03-01; source msha-controller-operator-history
- **controller_controls_operator:** Paul K  Craig  et al → Aberdeen Sand & Gravel Company Inc; 1987-09-01 to 1992-03-01; source msha-controller-operator-history
- **operator_operates_mine:** Ccc Sand & Gravel Inc → IVANHOE PIT; 1992-03-02 to 2000-11-27; source msha-controller-operator-history
- **controller_controls_mine:** Thomas E  Chandler → IVANHOE PIT; 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 2000-11-27; source msha-controller-operator-history
- **controller_controls_mine:** Gary (Tim)  Bizzell  et al → IVANHOE PIT; 1999-11-02 to 2016-02-04; source msha-controller-operator-history
- **operator_operates_mine:** American Materials Company LLC → IVANHOE PIT; 2000-11-28 to 2016-02-24; source msha-controller-operator-history
- **controller_controls_operator:** Gary (Tim)  Bizzell  et al → American Materials Company LLC; 2000-11-28 to 2016-02-04; source msha-controller-operator-history
- **controller_controls_mine:** Summit Materials LLC → IVANHOE PIT; 2016-02-05 to 2025-08-03; source msha-controller-operator-history
- **controller_controls_operator:** Summit Materials LLC → American Materials Company LLC; 2016-02-05 to 2016-02-24; source msha-controller-operator-history
- **operator_operates_mine:** American Materials Company → IVANHOE PIT; 2016-02-25 to 2016-02-25; source msha-controller-operator-history
- **controller_controls_operator:** Summit Materials LLC → American Materials Company; 2016-02-25 to 2016-02-25; source msha-controller-operator-history
- **operator_operates_mine:** American Materials Company,LLC → IVANHOE PIT; 2016-02-26 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Summit Materials LLC → American Materials Company,LLC; 2016-02-26 to 2025-08-03; source msha-controller-operator-history
- **controller_controls_operator:** Gary (Tim)  Bizzell  et al → American Materials Company,LLC; 2016-02-26 to 2016-02-04; source msha-controller-operator-history
- **controller_controls_mine:** CRH PLC → IVANHOE PIT; 2022-05-14 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** CRH PLC → American Materials Company; 2022-05-14 to 2016-02-25; source msha-controller-operator-history
- **controller_controls_mine:** Quikrete Holdings Inc. → IVANHOE PIT; 2025-08-04 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Quikrete Holdings Inc. → American Materials Company LLC; 2025-08-04 to 2016-02-24; source msha-controller-operator-history
- **controller_controls_operator:** Quikrete Holdings Inc. → American Materials Company,LLC; 2025-08-04 to current/open; source msha-controller-operator-history