# Relationship history for MSHA mine 4607304

Current hierarchy: **Alpha Natural Resources Holdings, Inc → Stirrat Coal Company → No 1 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: 2026-10-13T11:19:05.459773+00:00

## Valid-time edges

- **operator_operates_mine:** Cedar Creek Mining Inc → No 1 Mine; 1987-05-01 to 1994-02-21; source msha-controller-operator-history
- **controller_controls_mine:** Cline Larry → No 1 Mine; 1987-05-01 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Cline Larry → Cedar Creek Mining Inc; 1987-05-01 to 1994-02-21; source msha-controller-operator-history
- **controller_controls_mine:** Massey Energy Company → No 1 Mine; 1993-11-15 to 2011-05-31; source msha-controller-operator-history
- **operator_operates_mine:** Stirrat Coal Company → No 1 Mine; 1994-02-22 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Massey Energy Company → Stirrat Coal Company; 1994-02-22 to 2011-05-31; source msha-controller-operator-history
- **controller_controls_mine:** Alpha Natural Resources, Inc. → No 1 Mine; 2011-06-01 to 2016-07-25; source msha-controller-operator-history
- **controller_controls_operator:** Alpha Natural Resources, Inc. → Stirrat Coal Company; 2011-06-01 to 2016-07-25; source msha-controller-operator-history
- **controller_controls_mine:** Alpha Natural Resources Holdings, Inc → No 1 Mine; 2016-07-26 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Alpha Natural Resources Holdings, Inc → Stirrat Coal Company; 2016-07-26 to current/open; source msha-controller-operator-history