# Relationship history for MSHA mine 1519278

Current hierarchy: **Robert  Skeans → East Kentucky Excavation Inc → East Kentucky Excavation Inc Mine #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: 2026-10-18T09:31:49.615908+00:00

## Valid-time edges

- **controller_controls_mine:** Robert  Skeans → East Kentucky Excavation Inc Mine #3; 2004-01-12 to current/open; source msha-controller-operator-history
- **operator_operates_mine:** East Kentucky Excavation Inc → East Kentucky Excavation Inc Mine #3; 2008-07-31 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Robert  Skeans → East Kentucky Excavation Inc; 2008-07-31 to current/open; source msha-controller-operator-history