# Relationship history for MSHA mine 4202742

Current hierarchy: **Hal S Newton; Debra N Newton; Wyatt W Newton → Newton Construction Co., Inc → Newton Portable**

- 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:** Newton Construction Co., Inc → Newton Portable; 2022-07-07 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Hal S Newton et al → Newton Portable; 2022-07-07 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Hal S Newton et al → Newton Construction Co., Inc; 2022-07-07 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Wyatt W Newton et al → Newton Construction Co., Inc; 2022-07-07 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Debra N Newton et al → Newton Construction Co., Inc; 2022-07-07 to current/open; source msha-controller-operator-history