# Relationship history for MSHA mine 2302434

Current hierarchy: **Quikrete Holdings Inc. → Continental Cement Company, LLC → Hannibal Underground**

- 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:** Continental Cement Holding Company → Hannibal Underground; 1996-06-21 to 2011-05-30; source msha-controller-operator-history
- **controller_controls_mine:** Summit Materials LLC → Hannibal Underground; 2011-05-31 to 2025-02-09; source msha-controller-operator-history
- **operator_operates_mine:** Continental Cement Company, LLC → Hannibal Underground; 2012-05-11 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Summit Materials LLC → Continental Cement Company, LLC; 2012-05-11 to 2025-02-09; source msha-controller-operator-history
- **controller_controls_operator:** Continental Cement Holding Company → Continental Cement Company, LLC; 2012-05-11 to 2011-05-30; source msha-controller-operator-history
- **controller_controls_mine:** Quikrete Holdings Inc. → Hannibal Underground; 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