# Relationship history for MSHA mine 0800115

Current hierarchy: **Clariant AG → Clariant Corporation → Quincy Plant and Mines**

- Valid-time bounds: inclusive, date granularity
- Null end: open-ended in the upstream history row; not independent proof of present control
- Transaction-time observation: 2026-10-17T05:35:58.500035+00:00

## Valid-time edges

- **operator_operates_mine:** Floridin Company → Quincy Plant and Mines; 1950-01-01 to 1986-12-31; source msha-controller-operator-history
- **controller_controls_mine:** ITT Corp → Quincy Plant and Mines; 1950-01-01 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** ITT Corp → Floridin Company; 1950-01-01 to 1986-12-31; source msha-controller-operator-history
- **controller_controls_mine:** Engelhard Corp → Quincy Plant and Mines; 1950-01-01 to 2006-07-31; source msha-controller-operator-history
- **operator_operates_mine:** Floridin Company → Quincy Plant and Mines; 1987-01-01 to 1997-09-30; source msha-controller-operator-history
- **controller_controls_mine:** Rio Tinto Group → Quincy Plant and Mines; 1987-01-01 to 2005-01-19; source msha-controller-operator-history
- **controller_controls_operator:** Rio Tinto Group → Floridin Company; 1987-01-01 to 1997-09-30; source msha-controller-operator-history
- **operator_operates_mine:** BASF Catalysts LLC → Quincy Plant and Mines; 1997-10-01 to 2011-04-14; source msha-controller-operator-history
- **controller_controls_operator:** Engelhard Corp → BASF Catalysts LLC; 1997-10-01 to 2006-07-31; source msha-controller-operator-history
- **controller_controls_mine:** Active Minerals Inc → Quincy Plant and Mines; 2005-01-20 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Active Minerals Inc → Floridin Company; 2005-01-20 to 1997-09-30; source msha-controller-operator-history
- **controller_controls_mine:** BASF SE → Quincy Plant and Mines; 2006-08-01 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** BASF SE → BASF Catalysts LLC; 2006-08-01 to 2011-04-14; source msha-controller-operator-history
- **controller_controls_mine:** BASF SE → Quincy Plant and Mines; 2007-03-01 to current/open; source msha-controller-operator-history
- **operator_operates_mine:** BASF Corporation → Quincy Plant and Mines; 2011-04-15 to 2022-10-30; source msha-controller-operator-history
- **controller_controls_operator:** BASF SE → BASF Corporation; 2011-04-15 to 2022-10-30; source msha-controller-operator-history
- **controller_controls_mine:** Clariant AG → Quincy Plant and Mines; 2014-06-01 to current/open; source msha-controller-operator-history
- **operator_operates_mine:** Clariant Corporation → Quincy Plant and Mines; 2022-10-31 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Clariant AG → Clariant Corporation; 2022-10-31 to current/open; source msha-controller-operator-history