# Relationship history for MSHA mine 4500577

Current hierarchy: **Heidelberg Materials AG → Cadman Materials Inc → Everett Pit & 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: 2026-10-13T11:19:05.459773+00:00

## Valid-time edges

- **operator_operates_mine:** Associated Sand & Gravel Company Inc → Everett Pit & Plant; 1950-01-01 to 1989-03-13; source msha-controller-operator-history
- **controller_controls_mine:** Consolidated Gold Fields Limited → Everett Pit & Plant; 1950-01-01 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Consolidated Gold Fields Limited → Associated Sand & Gravel Company Inc; 1950-01-01 to 1989-03-13; source msha-controller-operator-history
- **controller_controls_mine:** CSR Ltd → Everett Pit & Plant; 1988-07-20 to 2003-03-31; source msha-controller-operator-history
- **operator_operates_mine:** Associated Sand & Gravel Company Inc → Everett Pit & Plant; 1989-03-14 to 1990-02-01; source msha-controller-operator-history
- **controller_controls_mine:** Hanson PLC → Everett Pit & Plant; 1989-03-14 to 1990-02-01; source msha-controller-operator-history
- **controller_controls_operator:** Hanson PLC → Associated Sand & Gravel Company Inc; 1989-03-14 to 1990-02-01; source msha-controller-operator-history
- **operator_operates_mine:** Csr Associated → Everett Pit & Plant; 1990-02-02 to 2001-09-30; source msha-controller-operator-history
- **controller_controls_mine:** CSR Ltd → Everett Pit & Plant; 1990-02-02 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** CSR Ltd → Csr Associated; 1990-02-02 to 2001-09-30; source msha-controller-operator-history
- **operator_operates_mine:** Rinker Materials → Everett Pit & Plant; 2001-10-01 to 2009-04-15; source msha-controller-operator-history
- **controller_controls_operator:** CSR Ltd → Rinker Materials; 2001-10-01 to 2003-03-31; source msha-controller-operator-history
- **controller_controls_mine:** Rinker Group Ltd → Everett Pit & Plant; 2003-04-01 to 2007-07-09; source msha-controller-operator-history
- **controller_controls_operator:** Rinker Group Ltd → Rinker Materials; 2003-04-01 to 2007-07-09; source msha-controller-operator-history
- **controller_controls_mine:** Cemex S A → Everett Pit & Plant; 2007-07-10 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Cemex S A → Rinker Materials; 2007-07-10 to 2009-04-15; source msha-controller-operator-history
- **controller_controls_mine:** Cemex S A → Everett Pit & Plant; 2008-08-01 to current/open; source msha-controller-operator-history
- **operator_operates_mine:** CEMEX Construction Materials Pacific, LLC → Everett Pit & Plant; 2009-04-16 to 2017-06-29; source msha-controller-operator-history
- **controller_controls_operator:** Cemex S A → CEMEX Construction Materials Pacific, LLC; 2009-04-16 to 2017-06-29; source msha-controller-operator-history
- **operator_operates_mine:** Cadman Materials Inc → Everett Pit & Plant; 2017-06-30 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Heidelberg Materials AG → Everett Pit & Plant; 2017-06-30 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Heidelberg Materials AG → Cadman Materials Inc; 2017-06-30 to current/open; source msha-controller-operator-history