# Relationship history for MSHA mine 2302072

Current hierarchy: **CRH PLC → APAC Kansas Inc → Gallatin 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:** Ashland Inc → Gallatin Quarry; 1950-01-01 to 2006-08-27; source msha-controller-operator-history
- **operator_operates_mine:** Grand River Quarry Inc → Gallatin Quarry; 1992-10-01 to 1998-04-16; source msha-controller-operator-history
- **controller_controls_mine:** Russell C  Buehler → Gallatin Quarry; 1992-10-01 to 1998-04-16; source msha-controller-operator-history
- **controller_controls_operator:** Russell C  Buehler → Grand River Quarry Inc; 1992-10-01 to 1998-04-16; source msha-controller-operator-history
- **controller_controls_mine:** Ashland Inc → Gallatin Quarry; 1996-08-07 to 2006-08-27; source msha-controller-operator-history
- **controller_controls_mine:** Ashland Inc → Gallatin Quarry; 1998-02-03 to 2006-08-27; source msha-controller-operator-history
- **operator_operates_mine:** Limpus Quarries Inc → Gallatin Quarry; 1998-04-17 to 2004-01-13; source msha-controller-operator-history
- **controller_controls_operator:** Ashland Inc → Limpus Quarries Inc; 1998-04-17 to 2004-01-13; source msha-controller-operator-history
- **operator_operates_mine:** APAC-Missouri Inc → Gallatin Quarry; 2004-01-14 to 2007-03-31; source msha-controller-operator-history
- **controller_controls_operator:** Ashland Inc → APAC-Missouri Inc; 2004-01-14 to 2006-08-27; source msha-controller-operator-history
- **controller_controls_mine:** CRH PLC → Gallatin Quarry; 2006-08-28 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** CRH PLC → Limpus Quarries Inc; 2006-08-28 to 2004-01-13; source msha-controller-operator-history
- **controller_controls_operator:** CRH PLC → APAC-Missouri Inc; 2006-08-28 to 2007-03-31; source msha-controller-operator-history
- **operator_operates_mine:** Limpus Quarries Inc. → Gallatin Quarry; 2007-04-01 to 2007-12-31; source msha-controller-operator-history
- **controller_controls_operator:** Ashland Inc → Limpus Quarries Inc.; 2007-04-01 to 2006-08-27; source msha-controller-operator-history
- **controller_controls_operator:** CRH PLC → Limpus Quarries Inc.; 2007-04-01 to 2007-12-31; source msha-controller-operator-history
- **operator_operates_mine:** APAC Kansas Inc → Gallatin Quarry; 2008-01-01 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Ashland Inc → APAC Kansas Inc; 2008-01-01 to 2006-08-27; source msha-controller-operator-history
- **controller_controls_operator:** CRH PLC → APAC Kansas Inc; 2008-01-01 to current/open; source msha-controller-operator-history