# Relationship history for MSHA mine 4609660

Current hierarchy: **Sev.en Global Investments a.s. → Rockwell Mining, LLC → Robinhood #2**

- 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:** Blackhawk Mining LLC → Robinhood #2; 2015-10-26 to 2020-05-31; source msha-controller-operator-history
- **controller_controls_mine:** Sev.en Global Investments a.s. → Robinhood #2; 2020-06-01 to current/open; source msha-controller-operator-history
- **operator_operates_mine:** Rockwell Mining, LLC → Robinhood #2; 2024-01-08 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Blackhawk Mining LLC → Rockwell Mining, LLC; 2024-01-08 to 2020-05-31; source msha-controller-operator-history
- **controller_controls_operator:** Sev.en Global Investments a.s. → Rockwell Mining, LLC; 2024-01-08 to current/open; source msha-controller-operator-history