# Relationship history for MSHA mine 3606770

Current hierarchy: **Saveikis R A → R A S Excavating Company → Stony Point Strip**

- 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:** Saveikis R A → Stony Point Strip; 1977-08-01 to current/open; source msha-controller-operator-history
- **operator_operates_mine:** R A S Excavating Company → Stony Point Strip; 1978-12-01 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Saveikis R A → R A S Excavating Company; 1978-12-01 to current/open; source msha-controller-operator-history