# Relationship history for MSHA mine 4601602

Current hierarchy: **Alpha Natural Resources Holdings, Inc → Greyeagle Coal Company → Mine #1**

- 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:** Kermit Coal Company → Mine #1; 1950-01-01 to 1987-07-09; source msha-controller-operator-history
- **controller_controls_mine:** Massey Energy Company → Mine #1; 1950-01-01 to 1987-07-09; source msha-controller-operator-history
- **controller_controls_operator:** Massey Energy Company → Kermit Coal Company; 1950-01-01 to 1987-07-09; source msha-controller-operator-history
- **operator_operates_mine:** Kermit Coal Company → Mine #1; 1987-07-10 to 1992-11-23; source msha-controller-operator-history
- **controller_controls_mine:** Shell Oil Company → Mine #1; 1987-07-10 to 1992-11-23; source msha-controller-operator-history
- **controller_controls_operator:** Shell Oil Company → Kermit Coal Company; 1987-07-10 to 1992-11-23; source msha-controller-operator-history
- **operator_operates_mine:** Kermit Coal Company → Mine #1; 1992-11-24 to 2000-01-11; source msha-controller-operator-history
- **controller_controls_mine:** Zeigler Coal Holding Company → Mine #1; 1992-11-24 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Zeigler Coal Holding Company → Kermit Coal Company; 1992-11-24 to 2000-01-11; source msha-controller-operator-history
- **operator_operates_mine:** Greyeagle Coal Company → Mine #1; 2000-01-12 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Massey Energy Company → Mine #1; 2000-01-12 to 2011-05-31; source msha-controller-operator-history
- **controller_controls_operator:** Massey Energy Company → Greyeagle Coal Company; 2000-01-12 to 2011-05-31; source msha-controller-operator-history
- **controller_controls_mine:** Alpha Natural Resources, Inc. → Mine #1; 2011-06-01 to 2016-07-25; source msha-controller-operator-history
- **controller_controls_operator:** Alpha Natural Resources, Inc. → Greyeagle Coal Company; 2011-06-01 to 2016-07-25; source msha-controller-operator-history
- **controller_controls_mine:** Alpha Natural Resources Holdings, Inc → Mine #1; 2016-07-26 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Alpha Natural Resources Holdings, Inc → Greyeagle Coal Company; 2016-07-26 to current/open; source msha-controller-operator-history