# Relationship history for MSHA mine 1512618

Current hierarchy: **Alpha Natural Resources Holdings, Inc → Rawl Sales & Processing Company → Big Bottom**

- 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:** Massey Energy Company → Big Bottom; 1976-06-17 to 2011-05-31; source msha-controller-operator-history
- **operator_operates_mine:** Big Bottom Coal Company → Big Bottom; 1980-10-01 to 1985-09-15; source msha-controller-operator-history
- **controller_controls_mine:** Sidney R  Young III → Big Bottom; 1980-10-01 to 1985-09-15; source msha-controller-operator-history
- **controller_controls_operator:** Sidney R  Young III → Big Bottom Coal Company; 1980-10-01 to 1985-09-15; source msha-controller-operator-history
- **controller_controls_mine:** Joby  Fields → Big Bottom; 1984-05-01 to 1995-05-11; source msha-controller-operator-history
- **operator_operates_mine:** Conakay Resources Inc → Big Bottom; 1985-09-16 to 1986-01-30; source msha-controller-operator-history
- **controller_controls_operator:** Joby  Fields → Conakay Resources Inc; 1985-09-16 to 1986-01-30; source msha-controller-operator-history
- **operator_operates_mine:** Rawl Sales & Processing Company → Big Bottom; 1986-01-31 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Massey Energy Company → Rawl Sales & Processing Company; 1986-01-31 to 2011-05-31; source msha-controller-operator-history
- **controller_controls_mine:** Alpha Natural Resources, Inc. → Big Bottom; 2011-06-01 to 2016-07-25; source msha-controller-operator-history
- **controller_controls_operator:** Alpha Natural Resources, Inc. → Rawl Sales & Processing Company; 2011-06-01 to 2016-07-25; source msha-controller-operator-history
- **controller_controls_mine:** Alpha Natural Resources Holdings, Inc → Big Bottom; 2016-07-26 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Alpha Natural Resources Holdings, Inc → Rawl Sales & Processing Company; 2016-07-26 to current/open; source msha-controller-operator-history