# Relationship history for MSHA mine 0405781

Current hierarchy: **John  Emmett; Lucretia  Emmett → Emmett's Excavation Inc → Mockingbird 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: 2026-10-17T05:35:58.500035+00:00

## Valid-time edges

- **operator_operates_mine:** Emmett's Excavation Inc → Mockingbird Mine; 2009-03-25 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** John  Emmett et al → Mockingbird Mine; 2009-03-25 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** John  Emmett et al → Emmett's Excavation Inc; 2009-03-25 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Lucretia  Emmett et al → Emmett's Excavation Inc; 2009-03-25 to current/open; source msha-controller-operator-history