# Relationship history for MSHA mine 2100453

Current hierarchy: **David O  Luedeke → R & R Ready-Mix Inc → Rediehs Pit**

- 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:** David O  Luedeke et al → Rediehs Pit; 1950-01-01 to current/open; source msha-controller-operator-history
- **operator_operates_mine:** Alexandria Concrete Company Inc → Rediehs Pit; 1950-01-01 to 1986-08-19; source msha-controller-operator-history
- **controller_controls_mine:** Berghuis Daryl J → Rediehs Pit; 1950-01-01 to 1986-08-19; source msha-controller-operator-history
- **controller_controls_operator:** Berghuis Daryl J → Alexandria Concrete Company Inc; 1950-01-01 to 1986-08-19; source msha-controller-operator-history
- **operator_operates_mine:** Alexandria Concrete Company → Rediehs Pit; 1986-08-20 to 1987-08-24; source msha-controller-operator-history
- **controller_controls_mine:** Todd R  Plaisted → Rediehs Pit; 1986-08-20 to 1987-08-24; source msha-controller-operator-history
- **controller_controls_operator:** Todd R  Plaisted → Alexandria Concrete Company; 1986-08-20 to 1987-08-24; source msha-controller-operator-history
- **operator_operates_mine:** R & R Ready-Mix Inc → Rediehs Pit; 1987-08-25 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** David O  Luedeke et al → R & R Ready-Mix Inc; 1987-08-25 to current/open; source msha-controller-operator-history