# Relationship history for MSHA mine 1401255

Current hierarchy: **CRH PLC → Apac-Kansas Inc  Shears Division → Hays Pit No A-1**

- 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:** Ashland Inc → Hays Pit No A-1; 1950-01-01 to 2006-08-27; source msha-controller-operator-history
- **controller_controls_mine:** Grant  Stannard → Hays Pit No A-1; 1950-01-01 to current/open; source msha-controller-operator-history
- **operator_operates_mine:** Meeds Sand Company → Hays Pit No A-1; 1950-01-01 to 1994-11-10; source msha-controller-operator-history
- **controller_controls_mine:** Meeds David → Hays Pit No A-1; 1950-01-01 to 1994-11-10; source msha-controller-operator-history
- **controller_controls_operator:** Meeds David → Meeds Sand Company; 1950-01-01 to 1994-11-10; source msha-controller-operator-history
- **operator_operates_mine:** Allied Inc → Hays Pit No A-1; 1994-11-11 to 1999-04-26; source msha-controller-operator-history
- **controller_controls_operator:** Grant  Stannard → Allied Inc; 1994-11-11 to 1999-04-26; source msha-controller-operator-history
- **operator_operates_mine:** Allied → Hays Pit No A-1; 1999-04-27 to 2005-01-20; source msha-controller-operator-history
- **controller_controls_mine:** Superfos America Inc → Hays Pit No A-1; 1999-04-27 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Superfos America Inc → Allied; 1999-04-27 to 2005-01-20; source msha-controller-operator-history
- **operator_operates_mine:** Apac-Kansas Inc  Shears Division → Hays Pit No A-1; 2005-01-21 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Ashland Inc → Apac-Kansas Inc  Shears Division; 2005-01-21 to 2006-08-27; source msha-controller-operator-history
- **controller_controls_mine:** CRH PLC → Hays Pit No A-1; 2006-08-28 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** CRH PLC → Apac-Kansas Inc  Shears Division; 2006-08-28 to current/open; source msha-controller-operator-history