# Relationship history for MSHA mine 2301038

Current hierarchy: **Quikrete Holdings Inc. → Continental Cement Company LLC → Owensville 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: 2026-10-13T11:19:05.459773+00:00

## Valid-time edges

- **operator_operates_mine:** General Chemical Corp → Owensville Plant; 1950-01-01 to 1993-10-16; source msha-controller-operator-history
- **controller_controls_mine:** Allied-Signal Inc → Owensville Plant; 1950-01-01 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Allied-Signal Inc → General Chemical Corp; 1950-01-01 to 1993-10-16; source msha-controller-operator-history
- **controller_controls_mine:** Scancem Ans & Material Service Corp → Owensville Plant; 1981-11-20 to current/open; source msha-controller-operator-history
- **operator_operates_mine:** Continental Cement Company Inc → Owensville Plant; 1993-10-17 to 1996-06-20; source msha-controller-operator-history
- **controller_controls_operator:** Scancem Ans & Material Service Corp → Continental Cement Company Inc; 1993-10-17 to 1996-06-20; source msha-controller-operator-history
- **operator_operates_mine:** Continental Cement Company LLC → Owensville Plant; 1996-06-21 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Continental Cement Holding Company → Owensville Plant; 1996-06-21 to 2011-05-30; source msha-controller-operator-history
- **controller_controls_operator:** Continental Cement Holding Company → Continental Cement Company LLC; 1996-06-21 to 2011-05-30; source msha-controller-operator-history
- **controller_controls_mine:** Summit Materials LLC → Owensville Plant; 2011-05-31 to 2025-02-09; source msha-controller-operator-history
- **controller_controls_operator:** Summit Materials LLC → Continental Cement Company LLC; 2011-05-31 to 2025-02-09; source msha-controller-operator-history
- **controller_controls_mine:** Quikrete Holdings Inc. → Owensville Plant; 2025-02-10 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Quikrete Holdings Inc. → Continental Cement Company LLC; 2025-02-10 to current/open; source msha-controller-operator-history