# Relationship history for MSHA mine 4703047

Current hierarchy: **Don  Iverson → Doniver, Inc. → Plant No. 2**

- 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:** Doniver, Inc. → Plant No. 2; 1995-01-01 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Don  Iverson et al → Plant No. 2; 1995-01-01 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Don  Iverson et al → Doniver, Inc.; 1995-01-01 to current/open; source msha-controller-operator-history