# Relationship history for MSHA mine 3200986

Current hierarchy: **Jace  Olson; Dudley  Chilcott; Gary  Chilcott → Bakken Group Inc. → Bakken Group 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: 2026-10-17T05:35:58.500035+00:00

## Valid-time edges

- **operator_operates_mine:** Bakken Group Inc. → Bakken Group Inc.; 2012-07-17 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Gary  Chilcott et al → Bakken Group Inc.; 2012-07-17 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Gary  Chilcott et al → Bakken Group Inc.; 2012-07-17 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Jace  Olson et al → Bakken Group Inc.; 2012-07-17 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Dudley  Chilcott et al → Bakken Group Inc.; 2012-07-17 to current/open; source msha-controller-operator-history