# Relationship history for MSHA mine 1401425

Current hierarchy: **CRH PLC → Apac-Kansas Inc Shears Division → Bieker Pit**

- 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 → Bieker Pit; 1950-01-01 to 2006-08-27; source msha-controller-operator-history
- **controller_controls_mine:** Grant  Stannard → Bieker Pit; 1950-01-01 to current/open; source msha-controller-operator-history
- **operator_operates_mine:** Allied Inc → Bieker Pit; 1983-02-01 to 1999-04-26; source msha-controller-operator-history
- **controller_controls_operator:** Grant  Stannard → Allied Inc; 1983-02-01 to 1999-04-26; source msha-controller-operator-history
- **operator_operates_mine:** Allied → Bieker Pit; 1999-04-27 to 1999-10-18; source msha-controller-operator-history
- **controller_controls_mine:** Superfos America Inc → Bieker Pit; 1999-04-27 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Superfos America Inc → Allied; 1999-04-27 to 1999-10-18; source msha-controller-operator-history
- **operator_operates_mine:** Apac-Kansas Inc Shears Division → Bieker Pit; 1999-10-19 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Ashland Inc → Apac-Kansas Inc Shears Division; 1999-10-19 to 2006-08-27; source msha-controller-operator-history
- **controller_controls_mine:** CRH PLC → Bieker Pit; 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