# Relationship history for MSHA mine 4103332

Current hierarchy: **Furnace John E → Manvel Sand Company → Manvel Sand Pit #1**

- 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:** Best Refuse Recycling Inc → Manvel Sand Pit #1; 1985-08-01 to 1987-12-31; source msha-controller-operator-history
- **controller_controls_mine:** Fincher Fred → Manvel Sand Pit #1; 1985-08-01 to 1987-12-31; source msha-controller-operator-history
- **controller_controls_operator:** Fincher Fred → Best Refuse Recycling Inc; 1985-08-01 to 1987-12-31; source msha-controller-operator-history
- **operator_operates_mine:** Manvel Sand Company → Manvel Sand Pit #1; 1988-01-01 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Furnace John E → Manvel Sand Pit #1; 1988-01-01 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Furnace John E → Manvel Sand Company; 1988-01-01 to current/open; source msha-controller-operator-history