# Relationship history for MSHA mine 2602829

Current hierarchy: **Verginia C  Ball; Michael T  Huntington → Nevada Rock LLC → Nelson Gold Rush**

- 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:** Nevada Rock LLC → Nelson Gold Rush; 2018-08-13 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Verginia C  Ball et al → Nelson Gold Rush; 2018-08-13 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Verginia C  Ball et al → Nevada Rock LLC; 2018-08-13 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Michael T  Huntington et al → Nevada Rock LLC; 2018-08-13 to current/open; source msha-controller-operator-history