# Relationship history for MSHA mine 0301955

Current hierarchy: **Robert B  Isaac → Merlin's LLC → Merlyn's Phantom Hill Mine**

- 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:** Merlin's LLC → Merlyn's Phantom Hill Mine; 2007-08-13 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Robert B  Isaac → Merlyn's Phantom Hill Mine; 2007-08-13 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Robert B  Isaac → Merlin's LLC; 2007-08-13 to current/open; source msha-controller-operator-history