# Relationship history for MSHA mine 3609092

Current hierarchy: **Brickworks Limited → Glen Gery Corp. → Bigler Plant Quarries**

- 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:** CRH PLC → Bigler Plant Quarries; 1999-05-17 to 2015-02-25; source msha-controller-operator-history
- **operator_operates_mine:** Glen Gery Corp. → Bigler Plant Quarries; 2002-05-29 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** CRH PLC → Glen Gery Corp.; 2002-05-29 to 2015-02-25; source msha-controller-operator-history
- **controller_controls_mine:** FIGGS BIDCO 2 LIMITED → Bigler Plant Quarries; 2015-02-26 to 2018-11-22; source msha-controller-operator-history
- **controller_controls_operator:** FIGGS BIDCO 2 LIMITED → Glen Gery Corp.; 2015-02-26 to 2018-11-22; source msha-controller-operator-history
- **controller_controls_mine:** Brickworks Limited → Bigler Plant Quarries; 2018-11-23 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Brickworks Limited → Glen Gery Corp.; 2018-11-23 to current/open; source msha-controller-operator-history