# Relationship history for MSHA mine 4503809

Current hierarchy: **Jason  Hadaller → Hadaller Construction → 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: 2026-10-13T11:19:05.459773+00:00

## Valid-time edges

- **operator_operates_mine:** Hadaller Construction → Portable 1; 2020-10-26 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Jason  Hadaller → Portable 1; 2020-10-26 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Jason  Hadaller → Hadaller Construction; 2020-10-26 to current/open; source msha-controller-operator-history