# Relationship history for MSHA mine 3608530

Current hierarchy: **Robin S  Kimmel → Rsk Mines → Primrose 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

- **operator_operates_mine:** Rsk Mines → Primrose Strip; 1995-11-01 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Robin S  Kimmel → Primrose Strip; 1995-11-01 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Robin S  Kimmel → Rsk Mines; 1995-11-01 to current/open; source msha-controller-operator-history