# Relationship history for MSHA mine 0900948

Current hierarchy: **IMin Partners → KaMin LLC → Wrens Calcine**

- 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:** English China Clays PLC → Wrens Calcine; 1950-01-01 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** J M Huber Corp → Wrens Calcine; 1950-01-01 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Asea Brown Boveri Ltd (ABB) → Wrens Calcine; 1980-10-01 to current/open; source msha-controller-operator-history
- **operator_operates_mine:** C-E Georgia Kaolin Company Inc → Wrens Calcine; 1981-12-01 to 1990-12-27; source msha-controller-operator-history
- **controller_controls_operator:** Asea Brown Boveri Ltd (ABB) → C-E Georgia Kaolin Company Inc; 1981-12-01 to 1990-12-27; source msha-controller-operator-history
- **operator_operates_mine:** Anglo American Clays Corp → Wrens Calcine; 1990-12-28 to 1999-11-04; source msha-controller-operator-history
- **controller_controls_operator:** English China Clays PLC → Anglo American Clays Corp; 1990-12-28 to 1999-11-04; source msha-controller-operator-history
- **operator_operates_mine:** J M Huber Corporation → Wrens Calcine; 1999-11-05 to 2008-04-29; source msha-controller-operator-history
- **controller_controls_operator:** J M Huber Corp → J M Huber Corporation; 1999-11-05 to 2008-04-29; source msha-controller-operator-history
- **controller_controls_mine:** IMin Partners → Wrens Calcine; 2008-04-22 to current/open; source msha-controller-operator-history
- **operator_operates_mine:** KaMin LLC → Wrens Calcine; 2008-04-30 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** IMin Partners → KaMin LLC; 2008-04-30 to current/open; source msha-controller-operator-history