# Relationship history for MSHA mine 2103216

Current hierarchy: **Donald F Redman; Gerald A Redman → Owatonna Construction Co. → PORTABLE #5**

- 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:** Gerald A Redman et al → PORTABLE #5; 1989-03-08 to current/open; source msha-controller-operator-history
- **operator_operates_mine:** Owatonna Construction Co. → PORTABLE #5; 1999-09-01 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Gerald A Redman et al → Owatonna Construction Co.; 1999-09-01 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Donald F Redman et al → Owatonna Construction Co.; 1999-09-01 to current/open; source msha-controller-operator-history