# Relationship history for MSHA mine 2402682

Current hierarchy: **Tom K  Sorkness → Natures Beauty Rock, Wood, Fine Finishes → Natures Beauty Rock & Wood**

- Valid-time bounds: inclusive, date granularity
- Null end: open-ended in the upstream history row; not independent proof of present control
- Transaction-time observation: 2026-10-18T09:31:49.615908+00:00

## Valid-time edges

- **operator_operates_mine:** Natures Beauty Rock, Wood, Fine Finishes → Natures Beauty Rock & Wood; 2014-10-29 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Tom K  Sorkness → Natures Beauty Rock & Wood; 2014-10-29 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Tom K  Sorkness → Natures Beauty Rock, Wood, Fine Finishes; 2014-10-29 to current/open; source msha-controller-operator-history