# Relationship history for MSHA mine 1701177

Current hierarchy: **Alan R  Spear → Wayne L Spear & Son Inc → Spears Pit**

- 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

- **operator_operates_mine:** Wayne L Spear & Son Inc → Spears Pit; 2026-04-15 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Alan R  Spear → Spears Pit; 2026-04-15 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Alan R  Spear → Wayne L Spear & Son Inc; 2026-04-15 to current/open; source msha-controller-operator-history