# Relationship history for MSHA mine 2302171

Current hierarchy: **Eagle Materials Inc → Central Plains Cement Co → Sugar Creek Ug Mine**

- 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

- **controller_controls_mine:** Lafarge S A → Sugar Creek Ug Mine; 1950-01-01 to current/open; source msha-controller-operator-history
- **operator_operates_mine:** Lafarge Corp → Sugar Creek Ug Mine; 1998-06-01 to 2002-09-04; source msha-controller-operator-history
- **controller_controls_operator:** Lafarge S A → Lafarge Corp; 1998-06-01 to 2002-09-04; source msha-controller-operator-history
- **controller_controls_mine:** Lafarge S A → Sugar Creek Ug Mine; 2001-07-12 to 2015-07-09; source msha-controller-operator-history
- **operator_operates_mine:** Lafarge North America → Sugar Creek Ug Mine; 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 Ug Mine; 2012-12-01 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Eagle Materials Inc → Sugar Creek Ug Mine; 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 Ug Mine; 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