# Relationship history for MSHA mine 1101663

Current hierarchy: **Brickworks Limited → Glen-Gery Corporation → Utica Clay**

- 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:** Ristokrat Clay Products Company → Utica Clay; 1950-01-01 to 1981-11-29; source msha-controller-operator-history
- **controller_controls_mine:** R E  Cresto → Utica Clay; 1950-01-01 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** R E  Cresto → Ristokrat Clay Products Company; 1950-01-01 to 1981-11-29; source msha-controller-operator-history
- **controller_controls_mine:** Jack E  Boehm → Utica Clay; 1950-01-01 to current/open; source msha-controller-operator-history
- **operator_operates_mine:** Boehm Bros., Inc. → Utica Clay; 1981-11-30 to 2023-03-06; source msha-controller-operator-history
- **controller_controls_operator:** Jack E  Boehm → Boehm Bros., Inc.; 1981-11-30 to 2023-03-06; source msha-controller-operator-history
- **controller_controls_mine:** CRH PLC → Utica Clay; 1999-05-17 to 2015-02-25; source msha-controller-operator-history
- **controller_controls_mine:** FIGGS BIDCO 2 LIMITED → Utica Clay; 2015-02-26 to 2018-11-22; source msha-controller-operator-history
- **controller_controls_mine:** Brickworks Limited → Utica Clay; 2018-11-23 to current/open; source msha-controller-operator-history
- **operator_operates_mine:** Glen-Gery Corporation → Utica Clay; 2023-03-07 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** FIGGS BIDCO 2 LIMITED → Glen-Gery Corporation; 2023-03-07 to 2018-11-22; source msha-controller-operator-history
- **controller_controls_operator:** Brickworks Limited → Glen-Gery Corporation; 2023-03-07 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** CRH PLC → Glen-Gery Corporation; 2023-03-07 to 2015-02-25; source msha-controller-operator-history