# Relationship history for MSHA mine 4103164

Current hierarchy: **NRG Energy Inc → Jewett Mine LLC → Jewett 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

- **controller_controls_mine:** Montana Power Company → Jewett Mine; 1979-04-17 to 2001-04-29; source msha-controller-operator-history
- **operator_operates_mine:** Northwestern Resources Company → Jewett Mine; 1982-11-01 to 2001-04-29; source msha-controller-operator-history
- **controller_controls_operator:** Montana Power Company → Northwestern Resources Company; 1982-11-01 to 2001-04-29; source msha-controller-operator-history
- **operator_operates_mine:** Jewett Mine LLC → Jewett Mine; 2001-04-30 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Westmoreland Coal Company → Jewett Mine; 2001-04-30 to 2019-03-14; source msha-controller-operator-history
- **controller_controls_operator:** Westmoreland Coal Company → Jewett Mine LLC; 2001-04-30 to 2019-03-14; source msha-controller-operator-history
- **controller_controls_mine:** Westmoreland Mining Holdings LLC → Jewett Mine; 2019-03-15 to 2020-08-04; source msha-controller-operator-history
- **controller_controls_operator:** Westmoreland Mining Holdings LLC → Jewett Mine LLC; 2019-03-15 to 2020-08-04; source msha-controller-operator-history
- **controller_controls_mine:** NRG Energy Inc → Jewett Mine; 2020-08-05 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** NRG Energy Inc → Jewett Mine LLC; 2020-08-05 to current/open; source msha-controller-operator-history