# Relationship history for MSHA mine 4003370

Current hierarchy: **Jay  Prestwood; Duke  Johnston → DJ Farms → DJ Farms**

- 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:** DJ Farms → DJ Farms; 2010-01-20 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Duke  Johnston et al → DJ Farms; 2010-01-20 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Duke  Johnston et al → DJ Farms; 2010-01-20 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Jay  Prestwood et al → DJ Farms; 2010-01-20 to current/open; source msha-controller-operator-history