# Relationship history for MSHA mine 0301586

Current hierarchy: **Martin Marietta Materials Inc → Martin Marietta Materials, Inc. → Jones Mill 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: 2026-10-17T05:35:58.500035+00:00

## Valid-time edges

- **controller_controls_mine:** Martin Marietta Materials Inc → Jones Mill Quarry; 1950-01-01 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Sam R  Clark → Jones Mill Quarry; 1950-01-01 to 1988-03-13; source msha-controller-operator-history
- **operator_operates_mine:** Mid-State Construction & Materials Inc → Jones Mill Quarry; 1984-10-01 to 1988-03-13; source msha-controller-operator-history
- **controller_controls_operator:** Sam R  Clark → Mid-State Construction & Materials Inc; 1984-10-01 to 1988-03-13; source msha-controller-operator-history
- **operator_operates_mine:** Mid-State Construction & Materials Inc → Jones Mill Quarry; 1988-03-14 to 1993-03-15; source msha-controller-operator-history
- **controller_controls_mine:** Aggregate Industries PLC → Jones Mill Quarry; 1988-03-14 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Aggregate Industries PLC → Mid-State Construction & Materials Inc; 1988-03-14 to 1993-03-15; source msha-controller-operator-history
- **operator_operates_mine:** Mid-State Construction & Materials Inc → Jones Mill Quarry; 1993-03-16 to 1998-03-18; source msha-controller-operator-history
- **controller_controls_mine:** Nova Materials Inc → Jones Mill Quarry; 1993-03-16 to 1998-03-31; source msha-controller-operator-history
- **controller_controls_operator:** Nova Materials Inc → Mid-State Construction & Materials Inc; 1993-03-16 to 1998-03-18; source msha-controller-operator-history
- **operator_operates_mine:** Martin Marietta Materials Inc → Jones Mill Quarry; 1998-03-19 to 2001-10-31; source msha-controller-operator-history
- **controller_controls_operator:** Martin Marietta Materials Inc → Martin Marietta Materials Inc; 1998-03-19 to 2001-10-31; source msha-controller-operator-history
- **operator_operates_mine:** Mid-State Const & Mat Inc. → Jones Mill Quarry; 2001-11-01 to 2005-05-18; source msha-controller-operator-history
- **controller_controls_mine:** Martin Marietta Materials Inc → Jones Mill Quarry; 2001-11-01 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Martin Marietta Materials Inc → Mid-State Const & Mat Inc.; 2001-11-01 to 2005-05-18; source msha-controller-operator-history
- **operator_operates_mine:** Martin Marietta Materials, Inc. → Jones Mill Quarry; 2005-05-19 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Martin Marietta Materials Inc → Martin Marietta Materials, Inc.; 2005-05-19 to current/open; source msha-controller-operator-history