# Relationship history for MSHA mine 0900143

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

- 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:** J M Huber Corporation → Wrens Plant; 1950-01-01 to 2008-04-29; source msha-controller-operator-history
- **controller_controls_mine:** J M Huber Corp → Wrens Plant; 1950-01-01 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** J M Huber Corp → J M Huber Corporation; 1950-01-01 to 2008-04-29; source msha-controller-operator-history
- **controller_controls_mine:** IMin Partners → Wrens Plant; 2008-04-22 to current/open; source msha-controller-operator-history
- **operator_operates_mine:** KaMin LLC → Wrens Plant; 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