# Relationship history for MSHA mine 3608751

Current hierarchy: **Alfred J  Brown → Alfred Brown Coal Company → Top Split Slope**

- 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:** Alfred Brown Coal Company → Top Split Slope; 1998-10-01 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Alfred J  Brown → Top Split Slope; 1998-10-01 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Alfred J  Brown → Alfred Brown Coal Company; 1998-10-01 to current/open; source msha-controller-operator-history