# Relationship history for MSHA mine 0301657

Current hierarchy: **Martin Marietta Materials Inc → Martin Marietta Materials Inc → ARCH ST 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: 2026-10-13T11:19:05.459773+00:00

## Valid-time edges

- **controller_controls_mine:** Martin Marietta Materials Inc → ARCH ST QUARRY; 1950-01-01 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Aggregate Industries PLC → ARCH ST QUARRY; 1988-03-14 to current/open; source msha-controller-operator-history
- **operator_operates_mine:** Mid-State Construction & Materials Inc → ARCH ST QUARRY; 1989-05-01 to 1993-03-15; source msha-controller-operator-history
- **controller_controls_operator:** Aggregate Industries PLC → Mid-State Construction & Materials Inc; 1989-05-01 to 1993-03-15; source msha-controller-operator-history
- **operator_operates_mine:** Mid-State Construction & Materials Inc → ARCH ST QUARRY; 1993-03-16 to 1998-03-31; source msha-controller-operator-history
- **controller_controls_mine:** Nova Materials Inc → ARCH ST 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 1998-03-31; source msha-controller-operator-history
- **operator_operates_mine:** Martin Marietta Materials Inc → ARCH ST QUARRY; 1998-04-01 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Martin Marietta Materials Inc → Martin Marietta Materials Inc; 1998-04-01 to current/open; source msha-controller-operator-history