# Relationship history for MSHA mine 2401662

Current hierarchy: **Siaperas John → S & S Diversified Inc → Silver Ridge**

- 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:** S & S Diversified Inc → Silver Ridge; 1982-03-01 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Siaperas John → Silver Ridge; 1982-03-01 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Siaperas John → S & S Diversified Inc; 1982-03-01 to current/open; source msha-controller-operator-history