# Relationship history for MSHA mine 2402446

Current hierarchy: **Rex  Leipheimer; John  Jeffery → R E Miller & Sons → R E Miller & Sons - Sprint Screen**

- 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:** Tom J  Miller → R E Miller & Sons - Sprint Screen; 1994-04-01 to 2020-06-30; source msha-controller-operator-history
- **operator_operates_mine:** R E Miller & Sons → R E Miller & Sons - Sprint Screen; 2006-05-16 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Tom J  Miller → R E Miller & Sons; 2006-05-16 to 2020-06-30; source msha-controller-operator-history
- **controller_controls_mine:** Rex  Leipheimer et al → R E Miller & Sons - Sprint Screen; 2020-07-01 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Rex  Leipheimer et al → R E Miller & Sons; 2020-07-01 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** John  Jeffery et al → R E Miller & Sons; 2020-07-01 to current/open; source msha-controller-operator-history