# Relationship history for MSHA mine 0404480

Current hierarchy: **Granite Construction Inc → Granite Construction Company → Poway 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

- **controller_controls_mine:** Granite Construction Inc → Poway Plant; 1950-01-01 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Calmat Company → Poway Plant; 1950-01-01 to current/open; source msha-controller-operator-history
- **operator_operates_mine:** Padre Transit Mix Inc → Poway Plant; 1980-11-01 to 1986-01-31; source msha-controller-operator-history
- **controller_controls_mine:** Matz R W → Poway Plant; 1980-11-01 to 1986-01-31; source msha-controller-operator-history
- **controller_controls_operator:** Matz R W → Padre Transit Mix Inc; 1980-11-01 to 1986-01-31; source msha-controller-operator-history
- **operator_operates_mine:** Calmat Company → Poway Plant; 1986-02-01 to 2005-11-13; source msha-controller-operator-history
- **controller_controls_operator:** Calmat Company → Calmat Company; 1986-02-01 to 2005-11-13; source msha-controller-operator-history
- **controller_controls_mine:** Legacy Vulcan Corp (Form:Vulcan Materials Co) → Poway Plant; 1999-01-06 to 2007-11-15; source msha-controller-operator-history
- **operator_operates_mine:** CalMat Co → Poway Plant; 2005-11-14 to 2020-10-05; source msha-controller-operator-history
- **controller_controls_operator:** Legacy Vulcan Corp (Form:Vulcan Materials Co) → CalMat Co; 2005-11-14 to 2007-11-15; source msha-controller-operator-history
- **controller_controls_mine:** Vulcan Materials Company → Poway Plant; 2007-11-16 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Vulcan Materials Company → CalMat Co; 2007-11-16 to 2020-10-05; source msha-controller-operator-history
- **operator_operates_mine:** Granite Construction Company → Poway Plant; 2020-10-06 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Granite Construction Inc → Granite Construction Company; 2020-10-06 to current/open; source msha-controller-operator-history