# Relationship history for MSHA mine 2602528

Current hierarchy: **Charles B  Maddox → Brown Bros Const → Hill Top 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:** Brown Bros Const → Hill Top Pit; 2003-10-01 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Charles B  Maddox → Hill Top Pit; 2003-10-01 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Charles B  Maddox → Brown Bros Const; 2003-10-01 to current/open; source msha-controller-operator-history