# Relationship history for MSHA mine 0400659

Current hierarchy: **Asea Brown Boveri Ltd (ABB) → American Lignite Products Company → Preparation 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:** Interpace Corp-Alpco Division → Preparation Plant; 1950-01-01 to 1972-12-31; source msha-controller-operator-history
- **controller_controls_mine:** Interpace Corp → Preparation Plant; 1950-01-01 to 1972-12-31; source msha-controller-operator-history
- **controller_controls_operator:** Interpace Corp → Interpace Corp-Alpco Division; 1950-01-01 to 1972-12-31; source msha-controller-operator-history
- **operator_operates_mine:** American Lignite Products Company → Preparation Plant; 1973-01-01 to 1977-05-31; source msha-controller-operator-history
- **controller_controls_mine:** Jon  Rhine → Preparation Plant; 1973-01-01 to 1977-05-31; source msha-controller-operator-history
- **controller_controls_operator:** Jon  Rhine → American Lignite Products Company; 1973-01-01 to 1977-05-31; source msha-controller-operator-history
- **operator_operates_mine:** American Lignite Products Company → Preparation Plant; 1977-06-01 to 1985-07-17; source msha-controller-operator-history
- **controller_controls_mine:** Hounslow John J → Preparation Plant; 1977-06-01 to 1985-07-17; source msha-controller-operator-history
- **controller_controls_operator:** Hounslow John J → American Lignite Products Company; 1977-06-01 to 1985-07-17; source msha-controller-operator-history
- **operator_operates_mine:** American Lignite Products Company → Preparation Plant; 1985-07-18 to 1989-11-05; source msha-controller-operator-history
- **controller_controls_mine:** Reading Company → Preparation Plant; 1985-07-18 to 1989-11-05; source msha-controller-operator-history
- **controller_controls_operator:** Reading Company → American Lignite Products Company; 1985-07-18 to 1989-11-05; source msha-controller-operator-history
- **operator_operates_mine:** American Lignite Products Company → Preparation Plant; 1989-11-06 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Asea Brown Boveri Ltd (ABB) → Preparation Plant; 1989-11-06 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Asea Brown Boveri Ltd (ABB) → American Lignite Products Company; 1989-11-06 to current/open; source msha-controller-operator-history