# Relationship history for MSHA mine 1901173

Current hierarchy: **James  Maxymillian → J H Maxymillian → Eagle Rotary Crusher**

- Valid-time bounds: inclusive, date granularity
- Null end: open-ended in the upstream history row; not independent proof of present control
- Transaction-time observation: 2026-10-17T05:35:58.500035+00:00

## Valid-time edges

- **controller_controls_mine:** Joseph N.  Kroboth → Eagle Rotary Crusher; 1986-05-01 to 2007-06-12; source msha-controller-operator-history
- **controller_controls_mine:** James  Maxymillian → Eagle Rotary Crusher; 2007-06-13 to current/open; source msha-controller-operator-history
- **operator_operates_mine:** J H Maxymillian → Eagle Rotary Crusher; 2008-02-15 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** James  Maxymillian → J H Maxymillian; 2008-02-15 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Joseph N.  Kroboth → J H Maxymillian; 2008-02-15 to 2007-06-12; source msha-controller-operator-history