# Relationship history for MSHA mine 2302157

Current hierarchy: **CRH PLC → APAC Tennessee, Inc. → Brickeys 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 → Brickeys Quarry; 1950-01-01 to 2006-08-27; source msha-controller-operator-history
- **controller_controls_mine:** Ashland Inc → Brickeys Quarry; 1996-10-01 to 2006-08-27; source msha-controller-operator-history
- **operator_operates_mine:** Brickeys Stone Llc → Brickeys Quarry; 1997-07-01 to 2001-10-25; source msha-controller-operator-history
- **controller_controls_mine:** Apac-Tennessee Inc  et al → Brickeys Quarry; 1997-07-01 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Apac-Tennessee Inc  et al → Brickeys Stone Llc; 1997-07-01 to 2001-10-25; source msha-controller-operator-history
- **controller_controls_operator:** Anderson-Tully Company  et al → Brickeys Stone Llc; 1997-07-01 to 2001-10-25; source msha-controller-operator-history
- **operator_operates_mine:** Brickeys Quarry → Brickeys Quarry; 2001-10-26 to 2006-09-27; source msha-controller-operator-history
- **controller_controls_mine:** Ashland Inc → Brickeys Quarry; 2001-10-26 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Ashland Inc → Brickeys Quarry; 2001-10-26 to 2006-09-27; source msha-controller-operator-history
- **controller_controls_mine:** CRH PLC → Brickeys Quarry; 2006-08-28 to current/open; source msha-controller-operator-history
- **operator_operates_mine:** Apac Tennessee Inc Brickeys Quarry → Brickeys Quarry; 2006-09-28 to 2015-01-29; source msha-controller-operator-history
- **controller_controls_operator:** Ashland Inc → Apac Tennessee Inc Brickeys Quarry; 2006-09-28 to 2006-08-27; source msha-controller-operator-history
- **controller_controls_operator:** CRH PLC → Apac Tennessee Inc Brickeys Quarry; 2006-09-28 to 2015-01-29; source msha-controller-operator-history
- **operator_operates_mine:** APAC Kansas Inc., → Brickeys Quarry; 2015-01-30 to 2020-01-01; source msha-controller-operator-history
- **controller_controls_operator:** Ashland Inc → APAC Kansas Inc.,; 2015-01-30 to 2006-08-27; source msha-controller-operator-history
- **controller_controls_operator:** CRH PLC → APAC Kansas Inc.,; 2015-01-30 to 2020-01-01; source msha-controller-operator-history
- **operator_operates_mine:** APAC Tennessee, Inc. → Brickeys Quarry; 2020-01-02 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Ashland Inc → APAC Tennessee, Inc.; 2020-01-02 to 2006-08-27; source msha-controller-operator-history
- **controller_controls_operator:** CRH PLC → APAC Tennessee, Inc.; 2020-01-02 to current/open; source msha-controller-operator-history