# Relationship history for MSHA mine 3200996

Current hierarchy: **Daniel R Plote → River Aggregates LLC → Portable Plant 3**

- 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:** Daniel R Plote → Portable Plant 3; 2011-07-20 to current/open; source msha-controller-operator-history
- **operator_operates_mine:** River Aggregates LLC → Portable Plant 3; 2012-10-17 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Daniel R Plote → River Aggregates LLC; 2012-10-17 to current/open; source msha-controller-operator-history