# Relationship history for MSHA mine 1103227

Current hierarchy: **John  Lipuma; Michelle  Muellner → Bolingbrook Mining Company LLC → Plant One**

- 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:** Bolingbrook Mining Company LLC → Plant One; 2010-07-12 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Michelle  Muellner et al → Plant One; 2010-07-12 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Michelle  Muellner et al → Bolingbrook Mining Company LLC; 2010-07-12 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** John  Lipuma et al → Bolingbrook Mining Company LLC; 2010-07-12 to current/open; source msha-controller-operator-history