# Relationship history for MSHA mine 4105818

Current hierarchy: **AP Hermel LLC; MGS Machinery LLC → H&G Custom Crushing LLC → LA ROCA 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:** H&G Custom Crushing LLC → LA ROCA PIT; 2025-09-04 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** AP Hermel LLC et al → LA ROCA PIT; 2025-09-04 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** AP Hermel LLC et al → H&G Custom Crushing LLC; 2025-09-04 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** MGS Machinery LLC et al → H&G Custom Crushing LLC; 2025-09-04 to current/open; source msha-controller-operator-history