# Relationship history for MSHA mine 3600607

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

- **operator_operates_mine:** Darlington Brick & Clay Products Company → Steiner Pit; 1950-01-01 to 1994-07-12; source msha-controller-operator-history
- **controller_controls_mine:** General Dynamics Corp → Steiner Pit; 1950-01-01 to 1994-07-12; source msha-controller-operator-history
- **controller_controls_operator:** General Dynamics Corp → Darlington Brick & Clay Products Company; 1950-01-01 to 1994-07-12; source msha-controller-operator-history
- **operator_operates_mine:** Darlington Brick & Clay Products → Steiner Pit; 1994-07-13 to 1999-12-31; source msha-controller-operator-history
- **controller_controls_mine:** Isiklar Holding A S → Steiner Pit; 1994-07-13 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Isiklar Holding A S → Darlington Brick & Clay Products; 1994-07-13 to 1999-12-31; source msha-controller-operator-history
- **operator_operates_mine:** Darlington Brick & Clay Products Co. LLC → Steiner Pit; 2000-01-01 to 2004-06-30; source msha-controller-operator-history
- **controller_controls_mine:** General Shale Products Corp → Steiner Pit; 2000-01-01 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** General Shale Products Corp → Darlington Brick & Clay Products Co. LLC; 2000-01-01 to 2004-06-30; source msha-controller-operator-history
- **controller_controls_mine:** Wienerberger AG → Steiner Pit; 2002-07-19 to current/open; source msha-controller-operator-history
- **operator_operates_mine:** General Shale Brick, Inc. → Steiner 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