# Relationship history for MSHA mine 3401870

Current hierarchy: **Lila Dean  Luman → Luman Rock → Luman Rock Pit #1**

- 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:** Luman Rock → Luman Rock Pit #1; 2001-07-01 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Lila Dean  Luman → Luman Rock Pit #1; 2001-07-01 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Lila Dean  Luman → Luman Rock; 2001-07-01 to current/open; source msha-controller-operator-history