# Relationship history for MSHA mine 3302137

Current hierarchy: **Steve  Schlabach → Holmes Supply Corp. → Holmes Supply 1**

- 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:** Jones Sand & Gravel Company → Holmes Supply 1; 1950-01-01 to 1997-04-30; source msha-controller-operator-history
- **controller_controls_mine:** Jones Gerald R → Holmes Supply 1; 1950-01-01 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Jones Gerald R → Jones Sand & Gravel Company; 1950-01-01 to 1997-04-30; source msha-controller-operator-history
- **operator_operates_mine:** Holmes Supply Corp. → Holmes Supply 1; 1997-05-01 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Steve  Schlabach  et al → Holmes Supply 1; 1997-05-01 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Steve  Schlabach  et al → Holmes Supply Corp.; 1997-05-01 to current/open; source msha-controller-operator-history