# Relationship history for MSHA mine 2402408

Current hierarchy: **Juan B  Lulack → Block Mountain Slate & Stone → Portable Crew #3**

- 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:** Juan B  Lulack → Portable Crew #3; 2001-09-01 to current/open; source msha-controller-operator-history
- **operator_operates_mine:** Block Mountain Slate & Stone → Portable Crew #3; 2005-06-16 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Juan B  Lulack → Block Mountain Slate & Stone; 2005-06-16 to current/open; source msha-controller-operator-history