# Relationship history for MSHA mine 2402114

Current hierarchy: **Betty Jean  Baltrusch → Bill Baltrusch Construction Inc → Bill Baltrusch Construction Inc**

- 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:** Otto  Baltrusch  et al → Bill Baltrusch Construction Inc; 1950-01-01 to current/open; source msha-controller-operator-history
- **operator_operates_mine:** Baltrusch Construction Company Inc → Bill Baltrusch Construction Inc; 1997-07-01 to 2002-12-31; source msha-controller-operator-history
- **controller_controls_operator:** Otto  Baltrusch  et al → Baltrusch Construction Company Inc; 1997-07-01 to 2002-12-31; source msha-controller-operator-history
- **controller_controls_operator:** Jerry  Mellem  et al → Baltrusch Construction Company Inc; 1997-07-01 to 2002-12-31; source msha-controller-operator-history
- **operator_operates_mine:** Bill Baltrusch Construction Inc → Bill Baltrusch Construction Inc; 2003-01-01 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** William H  Baltrusch → Bill Baltrusch Construction Inc; 2003-01-01 to 2017-02-25; source msha-controller-operator-history
- **controller_controls_operator:** William H  Baltrusch → Bill Baltrusch Construction Inc; 2003-01-01 to 2017-02-25; source msha-controller-operator-history
- **controller_controls_mine:** Betty Jean  Baltrusch → Bill Baltrusch Construction Inc; 2017-02-26 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Betty Jean  Baltrusch → Bill Baltrusch Construction Inc; 2017-02-26 to current/open; source msha-controller-operator-history