# Relationship history for MSHA mine 3300079

Current hierarchy: **CRH PLC → Shelly Materials Inc → Hardin 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

- **operator_operates_mine:** Hardin Quarry Company → Hardin Quarry; 1950-01-01 to 2001-05-10; source msha-controller-operator-history
- **controller_controls_mine:** Richard W  Pees → Hardin Quarry; 1950-01-01 to 2001-05-10; source msha-controller-operator-history
- **controller_controls_operator:** Richard W  Pees → Hardin Quarry Company; 1950-01-01 to 2001-05-10; source msha-controller-operator-history
- **controller_controls_mine:** CRH PLC → Hardin Quarry; 2000-03-01 to current/open; source msha-controller-operator-history
- **operator_operates_mine:** Hardin Quarry Company → Hardin Quarry; 2001-05-11 to 2002-05-31; source msha-controller-operator-history
- **controller_controls_mine:** CRH PLC → Hardin Quarry; 2001-05-11 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** CRH PLC → Hardin Quarry Company; 2001-05-11 to 2002-05-31; source msha-controller-operator-history
- **operator_operates_mine:** Shelly Materials Inc → Hardin Quarry; 2002-06-01 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** CRH PLC → Shelly Materials Inc; 2002-06-01 to current/open; source msha-controller-operator-history