# Relationship history for MSHA mine 0301963

Current hierarchy: **Frank Bradley  Johnson; William  Sweetser → Big Red Dirt Farm LLC → Big Red Dirt Farm**

- 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 Red Dirt Farm LLC → Big Red Dirt Farm; 2008-01-07 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** William  Sweetser  et al → Big Red Dirt Farm; 2008-01-07 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** William  Sweetser  et al → Big Red Dirt Farm LLC; 2008-01-07 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Frank Bradley  Johnson  et al → Big Red Dirt Farm LLC; 2008-01-07 to current/open; source msha-controller-operator-history