# Relationship history for MSHA mine 0404847

Current hierarchy: **Vulcan Materials Company → Triangle Rock Products → TRP Table Mountain 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: 2026-10-17T05:35:58.500035+00:00

## Valid-time edges

- **controller_controls_mine:** Martin Marietta Materials Inc → TRP Table Mountain Plant; 1950-01-01 to current/open; source msha-controller-operator-history
- **operator_operates_mine:** Green Rock Quarries → TRP Table Mountain Plant; 1986-09-01 to 1996-03-19; source msha-controller-operator-history
- **controller_controls_mine:** Charlotte  Green → TRP Table Mountain Plant; 1986-09-01 to 1996-03-19; source msha-controller-operator-history
- **controller_controls_operator:** Charlotte  Green → Green Rock Quarries; 1986-09-01 to 1996-03-19; source msha-controller-operator-history
- **controller_controls_mine:** Calmat Company → TRP Table Mountain Plant; 1987-11-09 to 1999-01-05; source msha-controller-operator-history
- **controller_controls_mine:** Meridian Aggregates Company LP → TRP Table Mountain Plant; 1991-03-01 to current/open; source msha-controller-operator-history
- **operator_operates_mine:** Meridian Aggregates Company → TRP Table Mountain Plant; 1996-03-20 to 2001-04-02; source msha-controller-operator-history
- **controller_controls_operator:** Meridian Aggregates Company LP → Meridian Aggregates Company; 1996-03-20 to 2001-04-02; source msha-controller-operator-history
- **controller_controls_mine:** Legacy Vulcan Corp (Form:Vulcan Materials Co) → TRP Table Mountain Plant; 1999-01-06 to 2007-11-15; source msha-controller-operator-history
- **operator_operates_mine:** Meridian Aggregates Company Lp → TRP Table Mountain Plant; 2001-04-03 to 2005-12-04; source msha-controller-operator-history
- **controller_controls_mine:** Martin Marietta Materials Inc → TRP Table Mountain Plant; 2001-04-03 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Martin Marietta Materials Inc → Meridian Aggregates Company Lp; 2001-04-03 to 2005-12-04; source msha-controller-operator-history
- **operator_operates_mine:** Martin Marietta Materials → TRP Table Mountain Plant; 2005-12-05 to 2008-04-10; source msha-controller-operator-history
- **controller_controls_operator:** Martin Marietta Materials Inc → Martin Marietta Materials; 2005-12-05 to 2008-04-10; source msha-controller-operator-history
- **controller_controls_mine:** Vulcan Materials Company → TRP Table Mountain Plant; 2007-11-16 to current/open; source msha-controller-operator-history
- **operator_operates_mine:** Triangle Rock Products → TRP Table Mountain Plant; 2008-04-11 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Vulcan Materials Company → Triangle Rock Products; 2008-04-11 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Legacy Vulcan Corp (Form:Vulcan Materials Co) → Triangle Rock Products; 2008-04-11 to 2007-11-15; source msha-controller-operator-history
- **controller_controls_operator:** Calmat Company → Triangle Rock Products; 2008-04-11 to 1999-01-05; source msha-controller-operator-history