# Relationship history for MSHA mine 3607285

Current hierarchy: **Joseph A  Owens → Sky Haven Coal Inc → Best Reclamation Project**

- 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:** Joseph A  Owens → Best Reclamation Project; 1972-11-01 to current/open; source msha-controller-operator-history
- **operator_operates_mine:** Sky Haven Coal Inc → Best Reclamation Project; 1982-03-01 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Joseph A  Owens → Sky Haven Coal Inc; 1982-03-01 to current/open; source msha-controller-operator-history