# Relationship history for MSHA mine 2101320

Current hierarchy: **Edward A Egan → Northern Con-Agg, LLP → Luverne Wash Plant**

- 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:** Hallett Construction Company → Luverne Wash Plant; 1950-01-01 to 1987-02-25; source msha-controller-operator-history
- **controller_controls_mine:** Hallett Construction Company → Luverne Wash Plant; 1950-01-01 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Hallett Construction Company → Hallett Construction Company; 1950-01-01 to 1987-02-25; source msha-controller-operator-history
- **controller_controls_mine:** Ronald M Anderson → Luverne Wash Plant; 1986-12-18 to current/open; source msha-controller-operator-history
- **operator_operates_mine:** Northern Con-Agg Inc → Luverne Wash Plant; 1987-02-26 to 1989-08-31; source msha-controller-operator-history
- **controller_controls_operator:** Ronald M Anderson → Northern Con-Agg Inc; 1987-02-26 to 1989-08-31; source msha-controller-operator-history
- **operator_operates_mine:** Northern Con-Agg Inc → Luverne Wash Plant; 1989-09-01 to 2008-12-31; source msha-controller-operator-history
- **controller_controls_mine:** Edward A Egan → Luverne Wash Plant; 1989-09-01 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Edward A Egan → Northern Con-Agg Inc; 1989-09-01 to 2008-12-31; source msha-controller-operator-history
- **operator_operates_mine:** Northern Con-Agg, LLP → Luverne Wash Plant; 2009-01-01 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Edward A Egan → Luverne Wash Plant; 2009-01-01 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Edward A Egan → Northern Con-Agg, LLP; 2009-01-01 to current/open; source msha-controller-operator-history