# Relationship history for MSHA mine 4606272

Current hierarchy: **Patriot Coal Corporation → Colony Bay Coal Company LLC → No 1A Surface 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:** Colony Bay Coal Company → No 1A Surface Mine; 1980-12-01 to 1987-10-22; source msha-controller-operator-history
- **controller_controls_mine:** Charles Coal Corporation et al → No 1A Surface Mine; 1980-12-01 to 1987-10-22; source msha-controller-operator-history
- **controller_controls_operator:** Charles Coal Corporation et al → Colony Bay Coal Company; 1980-12-01 to 1987-10-22; source msha-controller-operator-history
- **operator_operates_mine:** Colony Bay Coal Company → No 1A Surface Mine; 1987-10-23 to 1998-05-18; source msha-controller-operator-history
- **controller_controls_mine:** Hanson PLC → No 1A Surface Mine; 1987-10-23 to 1998-05-18; source msha-controller-operator-history
- **controller_controls_operator:** Hanson PLC → Colony Bay Coal Company; 1987-10-23 to 1998-05-18; source msha-controller-operator-history
- **operator_operates_mine:** Colony Bay Coal Company → No 1A Surface Mine; 1998-05-19 to 2005-02-14; source msha-controller-operator-history
- **controller_controls_mine:** Peabody Energy Corporation → No 1A Surface Mine; 1998-05-19 to 2007-10-30; source msha-controller-operator-history
- **controller_controls_operator:** Peabody Energy Corporation → Colony Bay Coal Company; 1998-05-19 to 2005-02-14; source msha-controller-operator-history
- **operator_operates_mine:** Mid-Atlantic Minerals, Inc. → No 1A Surface Mine; 2005-02-15 to 2006-08-02; source msha-controller-operator-history
- **controller_controls_mine:** Donald J Bias → No 1A Surface Mine; 2005-02-15 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Donald J Bias → Mid-Atlantic Minerals, Inc.; 2005-02-15 to 2006-08-02; source msha-controller-operator-history
- **controller_controls_mine:** Everett Gordon Justice → No 1A Surface Mine; 2006-02-15 to current/open; source msha-controller-operator-history
- **operator_operates_mine:** Ed Coal Inc → No 1A Surface Mine; 2006-08-03 to 2009-09-09; source msha-controller-operator-history
- **controller_controls_operator:** Everett Gordon Justice → Ed Coal Inc; 2006-08-03 to 2009-09-09; source msha-controller-operator-history
- **controller_controls_mine:** Patriot Coal Corporation → No 1A Surface Mine; 2007-10-31 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Patriot Coal Corporation → Colony Bay Coal Company; 2007-10-31 to 2005-02-14; source msha-controller-operator-history
- **operator_operates_mine:** Colony Bay Coal Company LLC → No 1A Surface Mine; 2009-09-10 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Patriot Coal Corporation → Colony Bay Coal Company LLC; 2009-09-10 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Peabody Energy Corporation → Colony Bay Coal Company LLC; 2009-09-10 to 2007-10-30; source msha-controller-operator-history