# Relationship history for MSHA mine 1511669

Current hierarchy: **Essar Minerals Canada Limited → Frasure Creek Mining LLC → Buckhorn Prep Plant**

- 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:** James A  Sigmon → Buckhorn Prep Plant; 1950-01-01 to current/open; source msha-controller-operator-history
- **operator_operates_mine:** Tarheel Coals Inc → Buckhorn Prep Plant; 1978-10-01 to 1979-10-04; source msha-controller-operator-history
- **controller_controls_operator:** James A  Sigmon → Tarheel Coals Inc; 1978-10-01 to 1979-10-04; source msha-controller-operator-history
- **controller_controls_mine:** Mountain Coals Inc → Buckhorn Prep Plant; 1979-10-01 to 1981-09-14; source msha-controller-operator-history
- **operator_operates_mine:** Lost Mountain Mining Inc → Buckhorn Prep Plant; 1979-10-05 to 1981-09-14; source msha-controller-operator-history
- **controller_controls_operator:** Mountain Coals Inc → Lost Mountain Mining Inc; 1979-10-05 to 1981-09-14; source msha-controller-operator-history
- **operator_operates_mine:** Buckhorn Processing → Buckhorn Prep Plant; 1981-09-15 to 1998-06-29; source msha-controller-operator-history
- **controller_controls_mine:** Cyprus Amax Minerals Company → Buckhorn Prep Plant; 1981-09-15 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Cyprus Amax Minerals Company → Buckhorn Processing; 1981-09-15 to 1998-06-29; source msha-controller-operator-history
- **operator_operates_mine:** Buckhorn Processing → Buckhorn Prep Plant; 1998-06-30 to 2004-09-30; source msha-controller-operator-history
- **controller_controls_mine:** Horizon Natural Resources Incorporated → Buckhorn Prep Plant; 1998-06-30 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Horizon Natural Resources Incorporated → Buckhorn Processing; 1998-06-30 to 2004-09-30; source msha-controller-operator-history
- **controller_controls_mine:** Jeffery A  Hoops → Buckhorn Prep Plant; 2001-03-01 to 2008-10-31; source msha-controller-operator-history
- **operator_operates_mine:** LCC Kentucky LLC → Buckhorn Prep Plant; 2004-10-01 to 2005-05-08; source msha-controller-operator-history
- **controller_controls_mine:** Lexington Coal Company LLC → Buckhorn Prep Plant; 2004-10-01 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Lexington Coal Company LLC → LCC Kentucky LLC; 2004-10-01 to 2005-05-08; source msha-controller-operator-history
- **controller_controls_mine:** Jeffery A  Hoops → Buckhorn Prep Plant; 2005-04-04 to current/open; source msha-controller-operator-history
- **operator_operates_mine:** Big Elk Mining Co LLC → Buckhorn Prep Plant; 2005-05-09 to 2005-07-13; source msha-controller-operator-history
- **controller_controls_operator:** Jeffery A  Hoops → Big Elk Mining Co LLC; 2005-05-09 to 2005-07-13; source msha-controller-operator-history
- **operator_operates_mine:** LCC Kentucky LLC → Buckhorn Prep Plant; 2005-07-14 to 2007-05-06; source msha-controller-operator-history
- **controller_controls_operator:** Lexington Coal Company LLC → LCC Kentucky LLC; 2005-07-14 to 2007-05-06; source msha-controller-operator-history
- **operator_operates_mine:** Frasure Creek Mining LLC → Buckhorn Prep Plant; 2007-05-07 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Jeffery A  Hoops → Frasure Creek Mining LLC; 2007-05-07 to 2008-10-31; source msha-controller-operator-history
- **controller_controls_mine:** Kenneth W  Woodring → Buckhorn Prep Plant; 2008-11-01 to 2010-04-06; source msha-controller-operator-history
- **controller_controls_operator:** Kenneth W  Woodring → Frasure Creek Mining LLC; 2008-11-01 to 2010-04-06; source msha-controller-operator-history
- **controller_controls_mine:** Essar Minerals Canada Limited → Buckhorn Prep Plant; 2010-04-07 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Essar Minerals Canada Limited → Frasure Creek Mining LLC; 2010-04-07 to current/open; source msha-controller-operator-history