# Relationship history for MSHA mine 2401749

Current hierarchy: **Miller Dennis R → Radersburg Mining Company → Portable Screening**

- 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:** Miller Dennis R → Portable Screening; 1981-10-01 to current/open; source msha-controller-operator-history
- **operator_operates_mine:** Poe Lead Inc → Portable Screening; 1983-11-01 to 1986-10-05; source msha-controller-operator-history
- **controller_controls_mine:** Dennis  Miller et al → Portable Screening; 1983-11-01 to 1986-10-05; source msha-controller-operator-history
- **controller_controls_operator:** Dennis  Miller et al → Poe Lead Inc; 1983-11-01 to 1986-10-05; source msha-controller-operator-history
- **operator_operates_mine:** Radersburg Mining Company → Portable Screening; 1986-10-06 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Miller Dennis R → Radersburg Mining Company; 1986-10-06 to current/open; source msha-controller-operator-history