# Relationship history for MSHA mine 1401825

Current hierarchy: **Garold  Skillett → Skillett and Sons Incorporated → Skillett Quarry 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: 2026-10-17T05:35:58.500035+00:00

## Valid-time edges

- **operator_operates_mine:** Skillett and Sons Incorporated → Skillett Quarry 1; 2021-04-22 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Garold  Skillett → Skillett Quarry 1; 2021-04-22 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Garold  Skillett → Skillett and Sons Incorporated; 2021-04-22 to current/open; source msha-controller-operator-history