# Relationship history for MSHA mine 3402207

Current hierarchy: **Peter R  Dawson → P&K Stone LLC → Mill Creek 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

- **controller_controls_mine:** Peter R  Dawson → Mill Creek Quarry; 2015-03-25 to current/open; source msha-controller-operator-history
- **operator_operates_mine:** P&K Stone LLC → Mill Creek Quarry; 2020-06-04 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Peter R  Dawson → P&K Stone LLC; 2020-06-04 to current/open; source msha-controller-operator-history