# Relationship history for MSHA mine 4801912

Current hierarchy: **Kristine  Artery; Brady Joe  Artery → Artery Construction, Inc. → Portable 1**

- Valid-time bounds: inclusive, date granularity
- Null end: open-ended in the upstream history row; not independent proof of present control
- Transaction-time observation: 2026-10-17T05:35:58.500035+00:00

## Valid-time edges

- **operator_operates_mine:** Artery Construction, Inc. → Portable 1; 2026-04-27 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Kristine  Artery et al → Portable 1; 2026-04-27 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Kristine  Artery et al → Artery Construction, Inc.; 2026-04-27 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Brady Joe  Artery  et al → Artery Construction, Inc.; 2026-04-27 to current/open; source msha-controller-operator-history