# Relationship history for MSHA mine 3600655

Current hierarchy: **Brickworks Limited → Glen-Gery Corporation → Glen-Gery Corporation, Pittsburgh 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: 2026-10-17T05:35:58.500035+00:00

## Valid-time edges

- **operator_operates_mine:** Milliken Brick Company Inc → Glen-Gery Corporation, Pittsburgh Plant; 1950-01-01 to 1979-07-31; source msha-controller-operator-history
- **controller_controls_mine:** Milliken Brick Company Inc → Glen-Gery Corporation, Pittsburgh Plant; 1950-01-01 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Milliken Brick Company Inc → Milliken Brick Company Inc; 1950-01-01 to 1979-07-31; source msha-controller-operator-history
- **operator_operates_mine:** Harmar Brick Inc → Glen-Gery Corporation, Pittsburgh Plant; 1979-08-01 to 1993-03-31; source msha-controller-operator-history
- **controller_controls_mine:** William H  Tritsch → Glen-Gery Corporation, Pittsburgh Plant; 1979-08-01 to 1993-03-31; source msha-controller-operator-history
- **controller_controls_operator:** William H  Tritsch → Harmar Brick Inc; 1979-08-01 to 1993-03-31; source msha-controller-operator-history
- **controller_controls_mine:** Redland Plc → Glen-Gery Corporation, Pittsburgh Plant; 1992-03-01 to 1996-09-30; source msha-controller-operator-history
- **operator_operates_mine:** Redland Brick Inc → Glen-Gery Corporation, Pittsburgh Plant; 1993-04-01 to 1996-09-30; source msha-controller-operator-history
- **controller_controls_operator:** Redland Plc → Redland Brick Inc; 1993-04-01 to 1996-09-30; source msha-controller-operator-history
- **operator_operates_mine:** Redland Brick Inc → Glen-Gery Corporation, Pittsburgh Plant; 1996-10-01 to 2020-09-30; source msha-controller-operator-history
- **controller_controls_mine:** William H  Belden → Glen-Gery Corporation, Pittsburgh 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 → Glen-Gery Corporation, Pittsburgh Plant; 1999-05-17 to 2015-02-25; source msha-controller-operator-history
- **controller_controls_mine:** FIGGS BIDCO 2 LIMITED → Glen-Gery Corporation, Pittsburgh Plant; 2015-02-26 to 2018-11-22; source msha-controller-operator-history
- **controller_controls_mine:** Robert  Belden → Glen-Gery Corporation, Pittsburgh 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 → Glen-Gery Corporation, Pittsburgh Plant; 2018-11-23 to current/open; source msha-controller-operator-history
- **operator_operates_mine:** Glen-Gery Corporation → Glen-Gery Corporation, Pittsburgh Plant; 2020-10-01 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** FIGGS BIDCO 2 LIMITED → Glen-Gery Corporation; 2020-10-01 to 2018-11-22; source msha-controller-operator-history
- **controller_controls_operator:** Brickworks Limited → Glen-Gery Corporation; 2020-10-01 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** CRH PLC → Glen-Gery Corporation; 2020-10-01 to 2015-02-25; source msha-controller-operator-history