# Relationship history for MSHA mine 4104527

Current hierarchy: **William (Eddie)  Goodspeed Jr → Goodspeed Sand Company → Goodspeed Sand Company**

- 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:** Goodspeed Sand Company → Goodspeed Sand Company; 2005-03-20 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** William (Eddie)  Goodspeed Jr → Goodspeed Sand Company; 2005-03-20 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** William (Eddie)  Goodspeed Jr → Goodspeed Sand Company; 2005-03-20 to current/open; source msha-controller-operator-history