# Relationship history for MSHA mine 1510418

Current hierarchy: **Fields Victor & James Eddie → Johnie Childers Coal Company → Hellier Dock**

- 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:** Fields Victor & James Eddie Et Al → Hellier Dock; 1950-01-01 to current/open; source msha-controller-operator-history
- **operator_operates_mine:** Johnie Childers Coal Company → Hellier Dock; 1977-05-01 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Fields Victor & James Eddie Et Al → Johnie Childers Coal Company; 1977-05-01 to current/open; source msha-controller-operator-history