# Relationship history for MSHA mine 4406913

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

- 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:** Marley Plc → Scott Pit; 1986-06-30 to current/open; source msha-controller-operator-history
- **operator_operates_mine:** General Shale Products Corp → Scott Pit; 1998-04-01 to 2004-06-30; source msha-controller-operator-history
- **controller_controls_operator:** Marley Plc → General Shale Products Corp; 1998-04-01 to 2004-06-30; source msha-controller-operator-history
- **controller_controls_mine:** Wienerberger AG → Scott Pit; 2002-07-19 to current/open; source msha-controller-operator-history
- **operator_operates_mine:** General Shale Brick, Inc. → Scott Pit; 2004-07-01 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Wienerberger AG → General Shale Brick, Inc.; 2004-07-01 to current/open; source msha-controller-operator-history