# Relationship history for MSHA mine 1517917

Current hierarchy: **Jimmie Leon  Hess → Brem Coal Co LLC → No 2**

- 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:** TECO Energy Inc → No 2; 1988-04-26 to 2015-09-20; source msha-controller-operator-history
- **controller_controls_mine:** Kenneth L  Farley et al → No 2; 1995-05-24 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Ricky  Blair → No 2; 1997-01-28 to current/open; source msha-controller-operator-history
- **operator_operates_mine:** T H W Coal Company Inc → No 2; 1997-03-01 to 2001-05-21; source msha-controller-operator-history
- **controller_controls_mine:** Howard  Norman et al → No 2; 1997-03-01 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Howard  Norman et al → T H W Coal Company Inc; 1997-03-01 to 2001-05-21; source msha-controller-operator-history
- **controller_controls_operator:** Charles T  Norman et al → T H W Coal Company Inc; 1997-03-01 to 2001-05-21; source msha-controller-operator-history
- **operator_operates_mine:** Clintwood Elkhorn Mining Company Inc → No 2; 2001-05-22 to 2001-09-09; source msha-controller-operator-history
- **controller_controls_operator:** TECO Energy Inc → Clintwood Elkhorn Mining Company Inc; 2001-05-22 to 2001-09-09; source msha-controller-operator-history
- **operator_operates_mine:** Dry Fork Energy Inc → No 2; 2001-09-10 to 2004-11-07; source msha-controller-operator-history
- **controller_controls_operator:** Kenneth L  Farley et al → Dry Fork Energy Inc; 2001-09-10 to 2004-11-07; source msha-controller-operator-history
- **operator_operates_mine:** Ridgecrest Energy, LLC → No 2; 2004-11-08 to 2005-12-28; source msha-controller-operator-history
- **controller_controls_mine:** Robert  Martin  et al → No 2; 2004-11-08 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Robert  Martin  et al → Ridgecrest Energy, LLC; 2004-11-08 to 2005-12-28; source msha-controller-operator-history
- **controller_controls_operator:** Doug  Hess et al → Ridgecrest Energy, LLC; 2004-11-08 to 2005-12-28; source msha-controller-operator-history
- **controller_controls_mine:** Elster  Mc Clanahan → No 2; 2005-05-11 to 2011-03-08; source msha-controller-operator-history
- **operator_operates_mine:** Blair Coal Company Inc → No 2; 2005-12-29 to 2006-04-06; source msha-controller-operator-history
- **controller_controls_operator:** Ricky  Blair → Blair Coal Company Inc; 2005-12-29 to 2006-04-06; source msha-controller-operator-history
- **operator_operates_mine:** Brem Coal Co LLC → No 2; 2006-04-07 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Elster  Mc Clanahan → Brem Coal Co LLC; 2006-04-07 to 2011-03-08; source msha-controller-operator-history
- **controller_controls_mine:** Jimmie Leon  Hess → No 2; 2011-03-09 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Jimmie Leon  Hess → Brem Coal Co LLC; 2011-03-09 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** James H  Booth et al → No 2; 2015-09-21 to 2019-06-15; source msha-controller-operator-history
- **controller_controls_operator:** James H  Booth et al → Clintwood Elkhorn Mining Company Inc; 2015-09-21 to 2001-09-09; source msha-controller-operator-history
- **controller_controls_mine:** J Mark  Campbell → No 2; 2019-06-16 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** J Mark  Campbell → Clintwood Elkhorn Mining Company Inc; 2019-06-16 to 2001-09-09; source msha-controller-operator-history