# Relationship history for MSHA mine 0502820

Current hierarchy: **Westmoreland Coal Company → Basin Resources Inc. → Golden Eagle**

- 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:** Crane Company → Golden Eagle; 1950-01-01 to 1986-10-31; source msha-controller-operator-history
- **operator_operates_mine:** C F & I Steel Corp → Golden Eagle; 1976-01-01 to 1984-01-04; source msha-controller-operator-history
- **controller_controls_operator:** Crane Company → C F & I Steel Corp; 1976-01-01 to 1984-01-04; source msha-controller-operator-history
- **controller_controls_mine:** Kn Energy Inc → Golden Eagle; 1980-05-01 to current/open; source msha-controller-operator-history
- **operator_operates_mine:** Wyoming Fuel Company → Golden Eagle; 1984-01-05 to 1991-05-31; source msha-controller-operator-history
- **controller_controls_operator:** Kn Energy Inc → Wyoming Fuel Company; 1984-01-05 to 1991-05-31; source msha-controller-operator-history
- **operator_operates_mine:** Basin Resources Inc. → Golden Eagle; 1991-06-01 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Montana Power Company → Golden Eagle; 1991-06-01 to 2004-10-24; source msha-controller-operator-history
- **controller_controls_operator:** Montana Power Company → Basin Resources Inc.; 1991-06-01 to 2004-10-24; source msha-controller-operator-history
- **controller_controls_mine:** Westmoreland Coal Company → Golden Eagle; 2004-10-25 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Westmoreland Coal Company → Basin Resources Inc.; 2004-10-25 to current/open; source msha-controller-operator-history