# Relationship history for MSHA mine 4801337

Current hierarchy: **Navajo Transitional Energy Company LLC → Navajo Transitional Energy Company, LLC → Antelope Coal 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: 2026-10-17T05:35:58.500035+00:00

## Valid-time edges

- **operator_operates_mine:** Antelope Coal Company → Antelope Coal Mine; 1980-12-01 to 1993-06-01; source msha-controller-operator-history
- **controller_controls_mine:** MidAmerican Energy Holdings Company → Antelope Coal Mine; 1980-12-01 to 1993-06-01; source msha-controller-operator-history
- **controller_controls_operator:** MidAmerican Energy Holdings Company → Antelope Coal Company; 1980-12-01 to 1993-06-01; source msha-controller-operator-history
- **operator_operates_mine:** Antelope Coal LLC → Antelope Coal Mine; 1993-06-02 to 2019-10-24; source msha-controller-operator-history
- **controller_controls_mine:** RTZ-CRA Group → Antelope Coal Mine; 1993-06-02 to 2009-11-19; source msha-controller-operator-history
- **controller_controls_operator:** RTZ-CRA Group → Antelope Coal LLC; 1993-06-02 to 2009-11-19; source msha-controller-operator-history
- **controller_controls_mine:** Cloud Peak Energy Resources LLC → Antelope Coal Mine; 2009-11-20 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Cloud Peak Energy Resources LLC → Antelope Coal LLC; 2009-11-20 to 2019-10-24; source msha-controller-operator-history
- **controller_controls_mine:** Navajo Nation → Antelope Coal Mine; 2013-12-31 to 2019-10-24; source msha-controller-operator-history
- **operator_operates_mine:** Navajo Transitional Energy Company, LLC → Antelope Coal Mine; 2019-10-25 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Navajo Nation → Navajo Transitional Energy Company, LLC; 2019-10-25 to 2019-10-24; source msha-controller-operator-history
- **controller_controls_mine:** Navajo Transitional Energy Company LLC → Antelope Coal Mine; 2019-10-25 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Navajo Transitional Energy Company LLC → Navajo Transitional Energy Company, LLC; 2019-10-25 to current/open; source msha-controller-operator-history