# Relationship history for MSHA mine 2302017

Current hierarchy: **Quikrete Holdings Inc. → Continental Cement Company Llc → MFR, INC**

- 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:** Resource Recovery Inc → MFR, INC; 1990-02-01 to 1992-04-15; source msha-controller-operator-history
- **controller_controls_mine:** Riedel International Inc → MFR, INC; 1990-02-01 to 1992-04-15; source msha-controller-operator-history
- **controller_controls_operator:** Riedel International Inc → Resource Recovery Inc; 1990-02-01 to 1992-04-15; source msha-controller-operator-history
- **operator_operates_mine:** Mfr Inc → MFR, INC; 1992-04-16 to 1996-06-20; source msha-controller-operator-history
- **controller_controls_mine:** Scancem Ans & Material Service Corp → MFR, INC; 1992-04-16 to 1996-06-20; source msha-controller-operator-history
- **controller_controls_operator:** Scancem Ans & Material Service Corp → Mfr Inc; 1992-04-16 to 1996-06-20; source msha-controller-operator-history
- **operator_operates_mine:** Continental Cement Company Llc → MFR, INC; 1996-06-21 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Continental Cement Holding Company → MFR, INC; 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 → MFR, INC; 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. → MFR, INC; 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