# Relationship history for MSHA mine 1800081

Current hierarchy: **Brickworks Limited → Glen-Gery Corporation → Cushwa Plant**

- 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:** Cushwa Brick Inc → Cushwa Plant; 1950-01-01 to 1992-02-29; source msha-controller-operator-history
- **controller_controls_mine:** Steetley PLC → Cushwa Plant; 1950-01-01 to 1992-02-29; source msha-controller-operator-history
- **controller_controls_operator:** Steetley PLC → Cushwa Brick Inc; 1950-01-01 to 1992-02-29; source msha-controller-operator-history
- **operator_operates_mine:** Redland Brick Inc → Cushwa Plant; 1992-03-01 to 1996-09-30; source msha-controller-operator-history
- **controller_controls_mine:** Redland Plc → Cushwa Plant; 1992-03-01 to 1996-09-30; source msha-controller-operator-history
- **controller_controls_operator:** Redland Plc → Redland Brick Inc; 1992-03-01 to 1996-09-30; source msha-controller-operator-history
- **operator_operates_mine:** Redland Brick Inc → Cushwa Plant; 1996-10-01 to 2020-09-30; source msha-controller-operator-history
- **controller_controls_mine:** William H  Belden → Cushwa Plant; 1996-10-01 to 2015-12-31; source msha-controller-operator-history
- **controller_controls_operator:** William H  Belden → Redland Brick Inc; 1996-10-01 to 2015-12-31; source msha-controller-operator-history
- **controller_controls_mine:** CRH PLC → Cushwa Plant; 1999-05-17 to 2015-02-25; source msha-controller-operator-history
- **controller_controls_mine:** FIGGS BIDCO 2 LIMITED → Cushwa Plant; 2015-02-26 to 2018-11-22; source msha-controller-operator-history
- **controller_controls_mine:** Robert  Belden → Cushwa Plant; 2016-01-01 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Robert  Belden → Redland Brick Inc; 2016-01-01 to 2020-09-30; source msha-controller-operator-history
- **controller_controls_mine:** Brickworks Limited → Cushwa Plant; 2018-11-23 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Brickworks Limited → Cushwa Plant; 2020-02-10 to current/open; source msha-controller-operator-history
- **operator_operates_mine:** Brickworks Eddie Acquisition Corporation → Cushwa Plant; 2020-10-01 to 2023-03-19; source msha-controller-operator-history
- **controller_controls_operator:** Brickworks Limited → Brickworks Eddie Acquisition Corporation; 2020-10-01 to 2023-03-19; source msha-controller-operator-history
- **operator_operates_mine:** Glen-Gery Corporation → Cushwa Plant; 2023-03-20 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** FIGGS BIDCO 2 LIMITED → Glen-Gery Corporation; 2023-03-20 to 2018-11-22; source msha-controller-operator-history
- **controller_controls_operator:** Brickworks Limited → Glen-Gery Corporation; 2023-03-20 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** CRH PLC → Glen-Gery Corporation; 2023-03-20 to 2015-02-25; source msha-controller-operator-history