# Relationship history for MSHA mine 0102969

Current hierarchy: **Chuck E  Welsh; Mary Eileen  O'Keefe → Brilliant Coal LLC → Brilliant Coal Washer**

- 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:** Big Mitch Prep Company Inc → Brilliant Coal Washer; 1992-09-01 to 2006-04-30; source msha-controller-operator-history
- **controller_controls_mine:** Bobby  Mitchell → Brilliant Coal Washer; 1992-09-01 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Bobby  Mitchell → Big Mitch Prep Company Inc; 1992-09-01 to 2006-04-30; source msha-controller-operator-history
- **operator_operates_mine:** Brilliant Coal LLC → Brilliant Coal Washer; 2006-05-01 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Mary Eileen  O'Keefe  et al → Brilliant Coal Washer; 2006-05-01 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Mary Eileen  O'Keefe  et al → Brilliant Coal LLC; 2006-05-01 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Chuck E  Welsh  et al → Brilliant Coal LLC; 2006-05-01 to current/open; source msha-controller-operator-history