# Relationship history for MSHA mine 0900127

Current hierarchy: **IMin Partners → KaMin LLC. → Washington County Mine**

- 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:** BASF Catalysts LLC → Washington County Mine; 1950-01-01 to 2010-03-31; source msha-controller-operator-history
- **controller_controls_mine:** Engelhard Corp → Washington County Mine; 1950-01-01 to 2006-07-31; source msha-controller-operator-history
- **controller_controls_operator:** Engelhard Corp → BASF Catalysts LLC; 1950-01-01 to 2006-07-31; source msha-controller-operator-history
- **controller_controls_mine:** BASF SE → Washington County Mine; 2006-08-01 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** BASF SE → BASF Catalysts LLC; 2006-08-01 to 2010-03-31; source msha-controller-operator-history
- **controller_controls_mine:** BASF SE → Washington County Mine; 2007-03-01 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** IMin Partners → Washington County Mine; 2008-04-22 to current/open; source msha-controller-operator-history
- **operator_operates_mine:** BASF Corporation → Washington County Mine; 2010-04-01 to 2022-09-30; source msha-controller-operator-history
- **controller_controls_operator:** BASF SE → BASF Corporation; 2010-04-01 to 2022-09-30; source msha-controller-operator-history
- **operator_operates_mine:** KaMin LLC. → Washington County Mine; 2022-10-01 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** IMin Partners → KaMin LLC.; 2022-10-01 to current/open; source msha-controller-operator-history