# Relationship history for MSHA mine 4202213

Current hierarchy: **Western Energy Partners; Elgin Services Co Inc → Tar Sands Holdings II, LLC → Crown Asphalt Ridge A-Pit**

- 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:** Crown Asphalt Corp → Crown Asphalt Ridge A-Pit; 1998-07-01 to 1998-12-21; source msha-controller-operator-history
- **controller_controls_mine:** Crown Energy Corp → Crown Asphalt Ridge A-Pit; 1998-07-01 to 1998-12-21; source msha-controller-operator-history
- **controller_controls_operator:** Crown Energy Corp → Crown Asphalt Corp; 1998-07-01 to 1998-12-21; source msha-controller-operator-history
- **operator_operates_mine:** Morrison Knudsen Corp An Ohio Corp → Crown Asphalt Ridge A-Pit; 1998-12-22 to 2008-05-20; source msha-controller-operator-history
- **controller_controls_mine:** Washington Group International Inc → Crown Asphalt Ridge A-Pit; 1998-12-22 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Washington Group International Inc → Morrison Knudsen Corp An Ohio Corp; 1998-12-22 to 2008-05-20; source msha-controller-operator-history
- **operator_operates_mine:** Crown Asphalt Ridge LLC → Crown Asphalt Ridge A-Pit; 2008-05-21 to 2013-04-04; source msha-controller-operator-history
- **controller_controls_mine:** Korea Technology Industry Co Ltd → Crown Asphalt Ridge A-Pit; 2008-05-21 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Korea Technology Industry Co Ltd → Crown Asphalt Ridge LLC; 2008-05-21 to 2013-04-04; source msha-controller-operator-history
- **operator_operates_mine:** Tar Sands Holdings II, LLC → Crown Asphalt Ridge A-Pit; 2013-04-05 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Western Energy Partners et al → Crown Asphalt Ridge A-Pit; 2013-04-05 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Western Energy Partners et al → Tar Sands Holdings II, LLC; 2013-04-05 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Elgin Services Co Inc et al → Tar Sands Holdings II, LLC; 2013-04-05 to current/open; source msha-controller-operator-history