# Relationship history for MSHA mine 3609720

Current hierarchy: **John H  Sholtiss → John Sholtiss → D & J Quarry**

- 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:** John Sholtiss → D & J Quarry; 2009-03-18 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** John H  Sholtiss → D & J Quarry; 2009-03-18 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** John H  Sholtiss → John Sholtiss; 2009-03-18 to current/open; source msha-controller-operator-history