# Relationship history for MSHA mine 1518763

Current hierarchy: **Jimmy D  Tackett → Pike-Floyd Mining, Inc. → Simpson Br**

- 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:** Conroy  Coleman  et al → Simpson Br; 1987-11-01 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Randall G  Vance → Simpson Br; 2002-09-10 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Jimmy W  Tackett et al → Simpson Br; 2003-02-12 to current/open; source msha-controller-operator-history
- **operator_operates_mine:** C & L Coal Co Inc → Simpson Br; 2004-05-20 to 2005-03-20; source msha-controller-operator-history
- **controller_controls_operator:** Conroy  Coleman  et al → C & L Coal Co Inc; 2004-05-20 to 2005-03-20; source msha-controller-operator-history
- **operator_operates_mine:** RV Mining LLC → Simpson Br; 2005-03-21 to 2009-03-25; source msha-controller-operator-history
- **controller_controls_operator:** Randall G  Vance → RV Mining LLC; 2005-03-21 to 2009-03-25; source msha-controller-operator-history
- **operator_operates_mine:** MiTac Mining, LLC → Simpson Br; 2009-03-26 to 2010-10-11; source msha-controller-operator-history
- **controller_controls_operator:** Jimmy W  Tackett et al → MiTac Mining, LLC; 2009-03-26 to 2010-10-11; source msha-controller-operator-history
- **controller_controls_mine:** John M  Potter et al → Simpson Br; 2010-07-16 to 2013-06-30; source msha-controller-operator-history
- **operator_operates_mine:** Blackhawk Mining LLC → Simpson Br; 2010-10-12 to 2010-11-09; source msha-controller-operator-history
- **controller_controls_operator:** John M  Potter et al → Blackhawk Mining LLC; 2010-10-12 to 2010-11-09; source msha-controller-operator-history
- **controller_controls_operator:** Thomas A  Potter et al → Blackhawk Mining LLC; 2010-10-12 to 2010-11-09; source msha-controller-operator-history
- **operator_operates_mine:** Pike-Floyd Mining, Inc. → Simpson Br; 2010-11-10 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Jimmy D  Tackett → Simpson Br; 2010-11-10 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Jimmy D  Tackett → Pike-Floyd Mining, Inc.; 2010-11-10 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Blackhawk Mining LLC → Simpson Br; 2013-07-01 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Blackhawk Mining LLC → Blackhawk Mining LLC; 2013-07-01 to 2010-11-09; source msha-controller-operator-history