# Relationship history for MSHA mine 4406785

Current hierarchy: **Alpha Natural Resources, Inc. → Knox Creek Coal Corporation → Bristol No 5**

- 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:** Hank K  Matney  et al → Bristol No 5; 1983-01-03 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** United  Company → Bristol No 5; 1987-04-16 to current/open; source msha-controller-operator-history
- **operator_operates_mine:** Knox Creek Coal Corp → Bristol No 5; 1994-11-01 to 1995-04-27; source msha-controller-operator-history
- **controller_controls_operator:** United  Company → Knox Creek Coal Corp; 1994-11-01 to 1995-04-27; source msha-controller-operator-history
- **operator_operates_mine:** Kens Coal Company Inc → Bristol No 5; 1995-04-28 to 1996-10-29; source msha-controller-operator-history
- **controller_controls_mine:** Kenes P  Roberts → Bristol No 5; 1995-04-28 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Kenes P  Roberts → Kens Coal Company Inc; 1995-04-28 to 1996-10-29; source msha-controller-operator-history
- **operator_operates_mine:** Bristol Coal Corp → Bristol No 5; 1996-10-30 to 1999-03-01; source msha-controller-operator-history
- **controller_controls_operator:** Hank K  Matney  et al → Bristol Coal Corp; 1996-10-30 to 1999-03-01; source msha-controller-operator-history
- **controller_controls_operator:** Rick A  Matney  et al → Bristol Coal Corp; 1996-10-30 to 1999-03-01; source msha-controller-operator-history
- **controller_controls_operator:** Fred D  Matney  et al → Bristol Coal Corp; 1996-10-30 to 1999-03-01; source msha-controller-operator-history
- **controller_controls_mine:** Massey Energy Company → Bristol No 5; 1997-08-26 to 2011-05-31; source msha-controller-operator-history
- **operator_operates_mine:** Knox Creek Coal Corporation → Bristol No 5; 1999-03-02 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Massey Energy Company → Knox Creek Coal Corporation; 1999-03-02 to 2011-05-31; source msha-controller-operator-history
- **controller_controls_mine:** Alpha Natural Resources, Inc. → Bristol No 5; 2011-06-01 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Alpha Natural Resources, Inc. → Knox Creek Coal Corporation; 2011-06-01 to current/open; source msha-controller-operator-history