# Relationship history for MSHA mine 1517826

Current hierarchy: **J Mark  Campbell → Premier Elkhorn Coal Company → PE 3 Underground**

- 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:** Rex  Fought → PE 3 Underground; 1987-01-01 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** TECO Energy Inc → PE 3 Underground; 1991-12-02 to 2015-09-20; source msha-controller-operator-history
- **controller_controls_mine:** Jim D  Akers et al → PE 3 Underground; 1993-12-20 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Ronnie  Smith → PE 3 Underground; 1995-10-11 to current/open; source msha-controller-operator-history
- **operator_operates_mine:** South Akers Mining Llc → PE 3 Underground; 1996-08-01 to 1997-04-29; source msha-controller-operator-history
- **controller_controls_operator:** Jim D  Akers et al → South Akers Mining Llc; 1996-08-01 to 1997-04-29; source msha-controller-operator-history
- **controller_controls_operator:** Harold E  Akers et al → South Akers Mining Llc; 1996-08-01 to 1997-04-29; source msha-controller-operator-history
- **operator_operates_mine:** Emily Enterprises Inc → PE 3 Underground; 1997-04-30 to 1998-11-09; source msha-controller-operator-history
- **controller_controls_operator:** Ronnie  Smith → Emily Enterprises Inc; 1997-04-30 to 1998-11-09; source msha-controller-operator-history
- **operator_operates_mine:** Sheep Fork Energy Inc → PE 3 Underground; 1998-11-10 to 2000-02-08; source msha-controller-operator-history
- **controller_controls_operator:** Rex  Fought → Sheep Fork Energy Inc; 1998-11-10 to 2000-02-08; source msha-controller-operator-history
- **controller_controls_mine:** Scott  Duncan → PE 3 Underground; 1999-04-01 to 2001-02-05; source msha-controller-operator-history
- **controller_controls_mine:** Donna L  Johnson → PE 3 Underground; 1999-08-27 to current/open; source msha-controller-operator-history
- **operator_operates_mine:** Phoenix Coal Company Inc → PE 3 Underground; 2000-02-09 to 2001-02-05; source msha-controller-operator-history
- **controller_controls_operator:** Scott  Duncan → Phoenix Coal Company Inc; 2000-02-09 to 2001-02-05; source msha-controller-operator-history
- **operator_operates_mine:** Diamond Star Mining Inc → PE 3 Underground; 2001-02-06 to 2002-12-31; source msha-controller-operator-history
- **controller_controls_operator:** Donna L  Johnson → Diamond Star Mining Inc; 2001-02-06 to 2002-12-31; source msha-controller-operator-history
- **operator_operates_mine:** Pride Mining, Inc. → PE 3 Underground; 2003-01-01 to 2006-05-07; source msha-controller-operator-history
- **controller_controls_mine:** Donna L  Johnson → PE 3 Underground; 2003-01-01 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Donna L  Johnson → Pride Mining, Inc.; 2003-01-01 to 2006-05-07; source msha-controller-operator-history
- **operator_operates_mine:** Premier Elkhorn Coal Company → PE 3 Underground; 2006-05-08 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** TECO Energy Inc → Premier Elkhorn Coal Company; 2006-05-08 to 2015-09-20; source msha-controller-operator-history
- **controller_controls_mine:** James H  Booth et al → PE 3 Underground; 2015-09-21 to 2019-06-15; source msha-controller-operator-history
- **controller_controls_operator:** James H  Booth et al → Premier Elkhorn Coal Company; 2015-09-21 to 2019-06-15; source msha-controller-operator-history
- **controller_controls_mine:** J Mark  Campbell → PE 3 Underground; 2019-06-16 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** J Mark  Campbell → Premier Elkhorn Coal Company; 2019-06-16 to current/open; source msha-controller-operator-history