# Relationship history for MSHA mine 1512628

Current hierarchy: **Tony R  Smith → H Tims Coal Processing, Inc → Gray Tipple**

- 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:** Cobra Resources Inc → Gray Tipple; 1980-11-01 to 1985-10-20; source msha-controller-operator-history
- **controller_controls_mine:** Lane L Robert Et Al → Gray Tipple; 1980-11-01 to 1985-10-20; source msha-controller-operator-history
- **controller_controls_operator:** Lane L Robert Et Al → Cobra Resources Inc; 1980-11-01 to 1985-10-20; source msha-controller-operator-history
- **operator_operates_mine:** Cumberland Processing Corp → Gray Tipple; 1985-10-21 to 1991-03-10; source msha-controller-operator-history
- **controller_controls_mine:** Nilson M Darrell & Joseph Newey → Gray Tipple; 1985-10-21 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Nilson M Darrell & Joseph Newey → Cumberland Processing Corp; 1985-10-21 to 1991-03-10; source msha-controller-operator-history
- **operator_operates_mine:** Cobra Coal Company → Gray Tipple; 1991-03-11 to 1994-11-15; source msha-controller-operator-history
- **controller_controls_mine:** Rag Aktiengesellschaft → Gray Tipple; 1991-03-11 to 1994-11-15; source msha-controller-operator-history
- **controller_controls_operator:** Rag Aktiengesellschaft → Cobra Coal Company; 1991-03-11 to 1994-11-15; source msha-controller-operator-history
- **operator_operates_mine:** Cobra Coal Company → Gray Tipple; 1994-11-16 to 1996-03-12; source msha-controller-operator-history
- **controller_controls_mine:** Watkins Andrew J → Gray Tipple; 1994-11-16 to 1996-03-12; source msha-controller-operator-history
- **controller_controls_operator:** Watkins Andrew J → Cobra Coal Company; 1994-11-16 to 1996-03-12; source msha-controller-operator-history
- **operator_operates_mine:** Cobra Coal Company Inc → Gray Tipple; 1996-03-13 to 2007-08-27; source msha-controller-operator-history
- **controller_controls_mine:** Curtis  Hopkins → Gray Tipple; 1996-03-13 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Curtis  Hopkins → Cobra Coal Company Inc; 1996-03-13 to 2007-08-27; source msha-controller-operator-history
- **operator_operates_mine:** Safeco Incorporated → Gray Tipple; 2007-08-28 to 2009-10-26; source msha-controller-operator-history
- **controller_controls_mine:** William W  Pierce → Gray Tipple; 2007-08-28 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** William W  Pierce → Safeco Incorporated; 2007-08-28 to 2009-10-26; source msha-controller-operator-history
- **controller_controls_mine:** Myron G.  McCoy → Gray Tipple; 2009-08-27 to current/open; source msha-controller-operator-history
- **operator_operates_mine:** Engle Hollow Mining LLC → Gray Tipple; 2009-10-27 to 2010-08-02; source msha-controller-operator-history
- **controller_controls_operator:** Myron G.  McCoy → Engle Hollow Mining LLC; 2009-10-27 to 2010-08-02; source msha-controller-operator-history
- **operator_operates_mine:** North American Gem US, Inc → Gray Tipple; 2010-08-03 to 2017-05-10; source msha-controller-operator-history
- **controller_controls_mine:** North American Gem, Inc. → Gray Tipple; 2010-08-03 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** North American Gem, Inc. → North American Gem US, Inc; 2010-08-03 to 2017-05-10; source msha-controller-operator-history
- **operator_operates_mine:** H Tims Coal Processing, Inc → Gray Tipple; 2017-05-11 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Tony R  Smith → Gray Tipple; 2017-05-11 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Tony R  Smith → H Tims Coal Processing, Inc; 2017-05-11 to current/open; source msha-controller-operator-history