# Relationship history for MSHA mine 4608574

Current hierarchy: **Alpha Natural Resources Holdings, Inc → Independence Coal Company Inc → Eagle Land No. 1 Sur. 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:** Costain Group PLC → Eagle Land No. 1 Sur. Mine; 1990-10-18 to 1997-01-30; source msha-controller-operator-history
- **controller_controls_mine:** Massey Energy Company → Eagle Land No. 1 Sur. Mine; 1991-12-01 to 2011-05-31; source msha-controller-operator-history
- **operator_operates_mine:** Costain Mining Inc → Eagle Land No. 1 Sur. Mine; 1996-08-01 to 1997-01-30; source msha-controller-operator-history
- **controller_controls_operator:** Costain Group PLC → Costain Mining Inc; 1996-08-01 to 1997-01-30; source msha-controller-operator-history
- **operator_operates_mine:** Lodestar Energy Inc → Eagle Land No. 1 Sur. Mine; 1997-01-31 to 2003-09-30; source msha-controller-operator-history
- **controller_controls_mine:** Iracoal Incorporated → Eagle Land No. 1 Sur. Mine; 1997-01-31 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Iracoal Incorporated → Lodestar Energy Inc; 1997-01-31 to 2003-09-30; source msha-controller-operator-history
- **operator_operates_mine:** Independence Coal Company Inc → Eagle Land No. 1 Sur. Mine; 2003-10-01 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Massey Energy Company → Independence Coal Company Inc; 2003-10-01 to 2011-05-31; source msha-controller-operator-history
- **controller_controls_mine:** Alpha Natural Resources, Inc. → Eagle Land No. 1 Sur. Mine; 2011-06-01 to 2016-07-25; source msha-controller-operator-history
- **controller_controls_operator:** Alpha Natural Resources, Inc. → Independence Coal Company Inc; 2011-06-01 to 2016-07-25; source msha-controller-operator-history
- **controller_controls_mine:** Alpha Natural Resources Holdings, Inc → Eagle Land No. 1 Sur. Mine; 2016-07-26 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Alpha Natural Resources Holdings, Inc → Independence Coal Company Inc; 2016-07-26 to current/open; source msha-controller-operator-history