# Relationship history for MSHA mine 0900338

Current hierarchy: **Marley Plc → Chattahoochee Brick Company Inc → Chattahoochee Brick Company Chattah**

- Valid-time bounds: inclusive, date granularity
- Null end: open-ended in the upstream history row; not independent proof of present control
- Transaction-time observation: 2026-10-18T09:31:49.615908+00:00

## Valid-time edges

- **operator_operates_mine:** Chattahoochee Brick Company Inc → Chattahoochee Brick Company Chattah; 1950-01-01 to 1986-06-29; source msha-controller-operator-history
- **controller_controls_mine:** General Shale Products Corp → Chattahoochee Brick Company Chattah; 1950-01-01 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** General Shale Products Corp → Chattahoochee Brick Company Inc; 1950-01-01 to 1986-06-29; source msha-controller-operator-history
- **operator_operates_mine:** Chattahoochee Brick Company Inc → Chattahoochee Brick Company Chattah; 1986-06-30 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Marley Plc → Chattahoochee Brick Company Chattah; 1986-06-30 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Marley Plc → Chattahoochee Brick Company Inc; 1986-06-30 to current/open; source msha-controller-operator-history