# Relationship history for MSHA mine 2103450

Current hierarchy: **Schulke Family Trust; Eric  Schulke; Kyle  Schulke → Northern Aggregate Inc. → Screening Plant**

- 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

- **controller_controls_mine:** Rick  Schulke → Screening Plant; 2001-03-06 to 2024-06-05; source msha-controller-operator-history
- **operator_operates_mine:** Northern Aggregate Inc. → Screening Plant; 2004-06-30 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Rick  Schulke → Northern Aggregate Inc.; 2004-06-30 to 2024-06-05; source msha-controller-operator-history
- **controller_controls_mine:** Eric  Schulke et al → Screening Plant; 2024-06-06 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Eric  Schulke et al → Northern Aggregate Inc.; 2024-06-06 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Schulke Family Trust et al → Northern Aggregate Inc.; 2024-06-06 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Kyle  Schulke et al → Northern Aggregate Inc.; 2024-06-06 to current/open; source msha-controller-operator-history