# Relationship history for MSHA mine 0505168

Current hierarchy: **Kenneth L  Skoglund → Skoglund Excavating Inc → Rancho Rosado Pit**

- 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:** Kenneth L  Skoglund → Rancho Rosado Pit; 2004-02-24 to current/open; source msha-controller-operator-history
- **operator_operates_mine:** Skoglund Excavating Inc → Rancho Rosado Pit; 2023-04-20 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Kenneth L  Skoglund → Skoglund Excavating Inc; 2023-04-20 to current/open; source msha-controller-operator-history