# Relationship history for MSHA mine 3304772

Current hierarchy: **Steve  Schlabach → Holmes Supply Corporation → Holmes Supply Steele 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: 2026-10-17T05:35:58.500035+00:00

## Valid-time edges

- **controller_controls_mine:** Steve  Schlabach  et al → Holmes Supply Steele Farm; 1997-05-01 to current/open; source msha-controller-operator-history
- **operator_operates_mine:** Holmes Supply Corporation → Holmes Supply Steele Farm; 2022-04-22 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Steve  Schlabach  et al → Holmes Supply Corporation; 2022-04-22 to current/open; source msha-controller-operator-history