# Relationship history for MSHA mine 1002403

Current hierarchy: **Matthew  Brackman; Andrew  Brackman → Brackman Excavating LLC → Hill City mine**

- 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:** Brackman Excavating LLC → Hill City mine; 2026-08-18 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Matthew  Brackman et al → Hill City mine; 2026-08-18 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Matthew  Brackman et al → Brackman Excavating LLC; 2026-08-18 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Andrew  Brackman et al → Brackman Excavating LLC; 2026-08-18 to current/open; source msha-controller-operator-history