# Relationship history for MSHA mine 0202643

Current hierarchy: **Vulcan Materials Company → Cal Mat Co → Green Valley**

- 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

- **controller_controls_mine:** Peter Kiewit Sons' Inc → Green Valley; 1950-01-01 to current/open; source msha-controller-operator-history
- **operator_operates_mine:** United Metro Materials Inc → Green Valley; 1995-09-01 to 2002-09-25; source msha-controller-operator-history
- **controller_controls_operator:** Peter Kiewit Sons' Inc → United Metro Materials Inc; 1995-09-01 to 2002-09-25; source msha-controller-operator-history
- **controller_controls_mine:** Legacy Vulcan Corp (Form:Vulcan Materials Co) → Green Valley; 1999-01-06 to 2007-11-15; source msha-controller-operator-history
- **controller_controls_mine:** CRH PLC → Green Valley; 2002-05-30 to current/open; source msha-controller-operator-history
- **operator_operates_mine:** Rinker Materials Western Inc. → Green Valley; 2002-09-26 to 2004-07-31; source msha-controller-operator-history
- **controller_controls_mine:** CSR Ltd → Green Valley; 2002-09-26 to 2003-03-31; source msha-controller-operator-history
- **controller_controls_operator:** CSR Ltd → Rinker Materials Western Inc.; 2002-09-26 to 2003-03-31; source msha-controller-operator-history
- **controller_controls_mine:** Rinker Group Ltd → Green Valley; 2003-04-01 to 2007-07-09; source msha-controller-operator-history
- **controller_controls_operator:** Rinker Group Ltd → Rinker Materials Western Inc.; 2003-04-01 to 2004-07-31; source msha-controller-operator-history
- **operator_operates_mine:** Rinker Materials → Green Valley; 2004-08-01 to 2007-12-31; source msha-controller-operator-history
- **controller_controls_mine:** Rinker Group Ltd → Green Valley; 2004-08-01 to 2007-07-09; source msha-controller-operator-history
- **controller_controls_operator:** Rinker Group Ltd → Rinker Materials; 2004-08-01 to 2007-07-09; source msha-controller-operator-history
- **controller_controls_mine:** Cemex S A → Green Valley; 2007-07-10 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Cemex S A → Rinker Materials Western Inc.; 2007-07-10 to 2004-07-31; source msha-controller-operator-history
- **controller_controls_operator:** Cemex S A → Rinker Materials; 2007-07-10 to 2007-12-31; source msha-controller-operator-history
- **controller_controls_mine:** Vulcan Materials Company → Green Valley; 2007-11-16 to current/open; source msha-controller-operator-history
- **operator_operates_mine:** Staker & Parson Co. → Green Valley; 2008-01-01 to 2015-05-04; source msha-controller-operator-history
- **controller_controls_operator:** CRH PLC → Staker & Parson Co.; 2008-01-01 to 2015-05-04; source msha-controller-operator-history
- **operator_operates_mine:** Cal Mat Co → Green Valley; 2015-05-05 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Vulcan Materials Company → Cal Mat Co; 2015-05-05 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Legacy Vulcan Corp (Form:Vulcan Materials Co) → Cal Mat Co; 2015-05-05 to 2007-11-15; source msha-controller-operator-history