# Relationship history for MSHA mine 1519664

Current hierarchy: **Brian  Edmonds; Jeff  Tackett → Tackett & Edmonds Contracting Inc. → Auger # 50**

- 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:** William A  Stephens et al → Auger # 50; 2008-12-02 to 2015-04-24; source msha-controller-operator-history
- **operator_operates_mine:** Augustus Augering and Contracting Inc → Auger # 50; 2012-05-16 to 2013-09-23; source msha-controller-operator-history
- **controller_controls_operator:** William A  Stephens et al → Augustus Augering and Contracting Inc; 2012-05-16 to 2013-09-23; source msha-controller-operator-history
- **operator_operates_mine:** Tackett & Edmonds Contracting Inc. → Auger # 50; 2013-09-24 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Brian  Edmonds et al → Auger # 50; 2013-09-24 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Brian  Edmonds et al → Tackett & Edmonds Contracting Inc.; 2013-09-24 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Jeff  Tackett et al → Tackett & Edmonds Contracting Inc.; 2013-09-24 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Melodye G  Stephens et al → Auger # 50; 2015-04-25 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Melodye G  Stephens et al → Augustus Augering and Contracting Inc; 2015-04-25 to 2013-09-23; source msha-controller-operator-history
- **controller_controls_operator:** Karen A  Stephens et al → Augustus Augering and Contracting Inc; 2015-04-25 to 2013-09-23; source msha-controller-operator-history
- **controller_controls_operator:** David A  Lester et al → Augustus Augering and Contracting Inc; 2015-04-25 to 2013-09-23; source msha-controller-operator-history