# Relationship history for MSHA mine 3402022

Current hierarchy: **Wienerberger AG → General Shale Brick, Inc. → Union City**

- 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:** Boral Limited → Union City; 1950-01-01 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Wienerberger AG → Union City; 2002-07-19 to current/open; source msha-controller-operator-history
- **operator_operates_mine:** Boral Bricks → Union City; 2006-09-19 to 2017-03-31; source msha-controller-operator-history
- **controller_controls_operator:** Boral Limited → Boral Bricks; 2006-09-19 to 2017-03-31; source msha-controller-operator-history
- **operator_operates_mine:** Meridian Brick LLC → Union City; 2017-04-01 to 2023-11-14; source msha-controller-operator-history
- **controller_controls_mine:** Boral Industries Inc et al → Union City; 2017-04-01 to 2021-10-17; source msha-controller-operator-history
- **controller_controls_operator:** Boral Industries Inc et al → Meridian Brick LLC; 2017-04-01 to 2021-10-17; source msha-controller-operator-history
- **controller_controls_operator:** Lone Star Funds Inc et al → Meridian Brick LLC; 2017-04-01 to 2021-10-17; source msha-controller-operator-history
- **controller_controls_mine:** Wienerberger AG → Union City; 2021-10-18 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Wienerberger AG → Meridian Brick LLC; 2021-10-18 to 2023-11-14; source msha-controller-operator-history
- **operator_operates_mine:** General Shale Brick, Inc. → Union City; 2023-11-15 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Wienerberger AG → General Shale Brick, Inc.; 2023-11-15 to current/open; source msha-controller-operator-history