# Relationship history for MSHA mine 0501437

Current hierarchy: **Amrize Ltd → Aggregate Industries WCR Inc → LYONS QUARRY**

- 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:** Andesite Rock Company → LYONS QUARRY; 1950-01-01 to 1992-03-31; source msha-controller-operator-history
- **controller_controls_mine:** L G Everist Inc → LYONS QUARRY; 1950-01-01 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** L G Everist Inc → Andesite Rock Company; 1950-01-01 to 1992-03-31; source msha-controller-operator-history
- **operator_operates_mine:** Golden'S Andesite Mining Company → LYONS QUARRY; 1992-04-01 to 2000-01-03; source msha-controller-operator-history
- **controller_controls_mine:** Reginald V  Golden → LYONS QUARRY; 1992-04-01 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Reginald V  Golden → Golden'S Andesite Mining Company; 1992-04-01 to 2000-01-03; source msha-controller-operator-history
- **controller_controls_mine:** Aggregate Industries PLC → LYONS QUARRY; 1997-05-14 to 2009-04-29; source msha-controller-operator-history
- **operator_operates_mine:** Aggregate Industries Northeast Region → LYONS QUARRY; 2000-01-04 to 2003-12-01; source msha-controller-operator-history
- **controller_controls_mine:** Aggregate Industries PLC → LYONS QUARRY; 2001-06-01 to 2009-04-29; source msha-controller-operator-history
- **controller_controls_operator:** Aggregate Industries PLC → Aggregate Industries Northeast Region; 2001-06-01 to 2003-12-01; source msha-controller-operator-history
- **operator_operates_mine:** Aggregate Industries WCR Inc → LYONS QUARRY; 2003-12-02 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Aggregate Industries PLC → Aggregate Industries WCR Inc; 2003-12-02 to 2009-04-29; source msha-controller-operator-history
- **controller_controls_mine:** Holcim Ltd → LYONS QUARRY; 2009-04-30 to 2015-07-09; source msha-controller-operator-history
- **controller_controls_operator:** Holcim Ltd → Aggregate Industries Northeast Region; 2009-04-30 to 2003-12-01; source msha-controller-operator-history
- **controller_controls_operator:** Holcim Ltd → Aggregate Industries WCR Inc; 2009-04-30 to 2015-07-09; source msha-controller-operator-history
- **controller_controls_mine:** Holcim Ltd → LYONS QUARRY; 2015-07-10 to 2025-06-22; source msha-controller-operator-history
- **controller_controls_operator:** Holcim Ltd → Aggregate Industries Northeast Region; 2015-07-10 to 2003-12-01; source msha-controller-operator-history
- **controller_controls_operator:** Holcim Ltd → Aggregate Industries WCR Inc; 2015-07-10 to 2025-06-22; source msha-controller-operator-history
- **controller_controls_mine:** Amrize Ltd → LYONS QUARRY; 2025-06-23 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Amrize Ltd → Aggregate Industries Northeast Region; 2025-06-23 to 2003-12-01; source msha-controller-operator-history
- **controller_controls_operator:** Amrize Ltd → Aggregate Industries WCR Inc; 2025-06-23 to current/open; source msha-controller-operator-history