# Relationship history for MSHA mine 1103285

Current hierarchy: **First Site Construction Development Corp; Danielle  Schlichting; Robert → N-TRAK Group, LLC → South Quarry**

- 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:** N-TRAK Group, LLC → South Quarry; 2017-09-06 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Danielle  Schlichting et al → South Quarry; 2017-09-06 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Danielle  Schlichting et al → N-TRAK Group, LLC; 2017-09-06 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** First Site Construction Development Corp et al → N-TRAK Group, LLC; 2017-09-06 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Robert  Anderson et al → N-TRAK Group, LLC; 2017-09-06 to current/open; source msha-controller-operator-history