# Relationship history for MSHA mine 3609971

Current hierarchy: **Alliant Energy Corp → RMT, Inc. → RMT Ralston**

- 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:** RMT, Inc. → RMT Ralston; 2011-11-28 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Alliant Energy Corp → RMT Ralston; 2011-11-28 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Alliant Energy Corp → RMT, Inc.; 2011-11-28 to current/open; source msha-controller-operator-history