# Relationship history for MSHA mine 1101105

Current hierarchy: **Amrize Ltd → Amrize Mid-America Inc. → Amrize Elburn Sand & Gravel**

- Valid-time bounds: inclusive, date granularity
- Null end: open-ended in the upstream history row; not independent proof of present control
- Transaction-time observation: 2026-10-18T09:31:49.615908+00:00

## Valid-time edges

- **operator_operates_mine:** Feltes Sand & Gravel Company, Inc. → Amrize Elburn Sand & Gravel; 1950-01-01 to 2007-03-31; source msha-controller-operator-history
- **controller_controls_mine:** Timothy J  Feltes → Amrize Elburn Sand & Gravel; 1950-01-01 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Timothy J  Feltes → Feltes Sand & Gravel Company, Inc.; 1950-01-01 to 2007-03-31; source msha-controller-operator-history
- **controller_controls_mine:** Lafarge S A → Amrize Elburn Sand & Gravel; 2001-07-12 to 2015-07-09; source msha-controller-operator-history
- **operator_operates_mine:** Lafarge North America Inc → Amrize Elburn Sand & Gravel; 2007-04-01 to 2014-03-16; source msha-controller-operator-history
- **controller_controls_operator:** Lafarge S A → Lafarge North America Inc; 2007-04-01 to 2014-03-16; source msha-controller-operator-history
- **controller_controls_mine:** Lafarge S A → Amrize Elburn Sand & Gravel; 2009-06-01 to 2015-07-09; source msha-controller-operator-history
- **operator_operates_mine:** Amrize Mid-America Inc. → Amrize Elburn Sand & Gravel; 2014-03-17 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Lafarge S A → Amrize Mid-America Inc.; 2014-03-17 to 2015-07-09; source msha-controller-operator-history
- **controller_controls_mine:** Holcim Ltd → Amrize Elburn Sand & Gravel; 2015-07-10 to 2025-06-22; source msha-controller-operator-history
- **controller_controls_operator:** Holcim Ltd → Amrize Mid-America Inc.; 2015-07-10 to 2025-06-22; source msha-controller-operator-history
- **controller_controls_mine:** Holcim Ltd → Amrize Elburn Sand & Gravel; 2015-07-10 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Holcim Ltd → Lafarge North America Inc; 2015-07-10 to 2014-03-16; source msha-controller-operator-history
- **controller_controls_mine:** Amrize Ltd → Amrize Elburn Sand & Gravel; 2025-06-23 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Amrize Ltd → Amrize Mid-America Inc.; 2025-06-23 to current/open; source msha-controller-operator-history