# Relationship history for MSHA mine 1202428

Current hierarchy: **Alcoa Corporation → Alcoa Fuels Inc. → Liberty 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

- **controller_controls_mine:** Vigo Coal Company Incorporated → Liberty Mine; 2005-05-11 to 2016-07-12; source msha-controller-operator-history
- **controller_controls_mine:** Vigo Coal Company Incorporated → Liberty Mine; 2005-06-08 to 2016-05-04; source msha-controller-operator-history
- **operator_operates_mine:** Vigo Coal Operating Company Inc → Liberty Mine; 2009-11-25 to 2018-02-01; source msha-controller-operator-history
- **controller_controls_operator:** Vigo Coal Company Incorporated → Vigo Coal Operating Company Inc; 2009-11-25 to 2016-05-04; source msha-controller-operator-history
- **controller_controls_mine:** White Stallion Energy → Liberty Mine; 2016-05-05 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** White Stallion Energy → Vigo Coal Operating Company Inc; 2016-05-05 to 2018-02-01; source msha-controller-operator-history
- **controller_controls_mine:** White Stallion Energy → Liberty Mine; 2016-07-13 to current/open; source msha-controller-operator-history
- **operator_operates_mine:** Vigo Coal Operating Company LLC → Liberty Mine; 2018-02-02 to 2022-04-04; source msha-controller-operator-history
- **controller_controls_operator:** White Stallion Energy → Vigo Coal Operating Company LLC; 2018-02-02 to 2022-04-04; source msha-controller-operator-history
- **controller_controls_operator:** Vigo Coal Company Incorporated → Vigo Coal Operating Company LLC; 2018-02-02 to 2016-07-12; source msha-controller-operator-history
- **operator_operates_mine:** Alcoa Fuels Inc. → Liberty Mine; 2022-04-05 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Alcoa Corporation → Liberty Mine; 2022-04-05 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Alcoa Corporation → Alcoa Fuels Inc.; 2022-04-05 to current/open; source msha-controller-operator-history