# Relationship history for MSHA mine 2300158

Current hierarchy: **Eagle Materials Inc → Central Plains Cement Co → SUGAR CREEK CEMENT 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: 2026-10-17T05:35:58.500035+00:00

## Valid-time edges

- **operator_operates_mine:** Missouri Portland Cement Company → SUGAR CREEK CEMENT PLANT; 1950-01-01 to 1985-12-26; source msha-controller-operator-history
- **controller_controls_mine:** H K Porter Company Inc → SUGAR CREEK CEMENT PLANT; 1950-01-01 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** H K Porter Company Inc → Missouri Portland Cement Company; 1950-01-01 to 1985-12-26; source msha-controller-operator-history
- **controller_controls_mine:** Lafarge S A → SUGAR CREEK CEMENT PLANT; 1950-01-01 to current/open; source msha-controller-operator-history
- **operator_operates_mine:** Lafarge Corp → SUGAR CREEK CEMENT PLANT; 1985-12-27 to 2002-09-04; source msha-controller-operator-history
- **controller_controls_operator:** Lafarge S A → Lafarge Corp; 1985-12-27 to 2002-09-04; source msha-controller-operator-history
- **controller_controls_mine:** Lafarge S A → SUGAR CREEK CEMENT PLANT; 2001-07-12 to 2015-07-09; source msha-controller-operator-history
- **operator_operates_mine:** Lafarge North America → SUGAR CREEK CEMENT PLANT; 2002-09-05 to 2012-11-30; source msha-controller-operator-history
- **controller_controls_operator:** Lafarge S A → Lafarge North America; 2002-09-05 to 2012-11-30; source msha-controller-operator-history
- **operator_operates_mine:** Central Plains Cement Co → SUGAR CREEK CEMENT PLANT; 2012-12-01 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Eagle Materials Inc → SUGAR CREEK CEMENT PLANT; 2012-12-01 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Eagle Materials Inc → Central Plains Cement Co; 2012-12-01 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Holcim Ltd → SUGAR CREEK CEMENT PLANT; 2015-07-10 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Holcim Ltd → Lafarge North America; 2015-07-10 to 2012-11-30; source msha-controller-operator-history