# Relationship history for MSHA mine 4300815

Current hierarchy: **Darcy Fremont Nelson Sr; Darcy Fremont Nelson Jr → Manchester Brook Materials, LLC → Jaw**

- 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:** Manchester Brook Materials, LLC → Jaw; 2023-05-01 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Darcy Fremont Nelson Jr et al → Jaw; 2023-05-02 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Darcy Fremont Nelson Jr et al → Manchester Brook Materials, LLC; 2023-05-02 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Darcy Fremont Nelson Sr et al → Manchester Brook Materials, LLC; 2023-05-02 to current/open; source msha-controller-operator-history