# Relationship history for MSHA mine 3607778

Current hierarchy: **Turner William C → Bill Turner Enterprises Inc → Toth 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

- **controller_controls_mine:** Turner William C → Toth Mine; 1984-07-01 to current/open; source msha-controller-operator-history
- **operator_operates_mine:** Bill Turner Enterprises Inc → Toth Mine; 1986-01-01 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Turner William C → Bill Turner Enterprises Inc; 1986-01-01 to current/open; source msha-controller-operator-history