# Relationship history for MSHA mine 3300523

Current hierarchy: **Wienerberger AG → General Shale Brick, Inc. → Shale Pit 002**

- 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:** Summitville Tiles, Inc. → Shale Pit 002; 1950-01-01 to 2024-02-29; source msha-controller-operator-history
- **controller_controls_mine:** Summitville Tiles Inc → Shale Pit 002; 1950-01-01 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Summitville Tiles Inc → Summitville Tiles, Inc.; 1950-01-01 to 2024-02-29; source msha-controller-operator-history
- **controller_controls_mine:** Wienerberger AG → Shale Pit 002; 2002-07-19 to current/open; source msha-controller-operator-history
- **operator_operates_mine:** General Shale Brick, Inc. → Shale Pit 002; 2024-03-01 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Wienerberger AG → General Shale Brick, Inc.; 2024-03-01 to current/open; source msha-controller-operator-history