# Relationship history for MSHA mine 1516858

Current hierarchy: **Lipari Energy → B&W Resources Inc. → Pioneer Preparation Plant**

- Valid-time bounds: inclusive, date granularity
- Null end: open-ended in the upstream history row; not independent proof of present control
- Transaction-time observation: 2026-10-17T05:35:58.500035+00:00

## Valid-time edges

- **controller_controls_mine:** Florida Progress Corporation → Pioneer Preparation Plant; 1989-02-10 to current/open; source msha-controller-operator-history
- **operator_operates_mine:** Diamond May Coal Company Inc → Pioneer Preparation Plant; 1989-08-01 to 1991-02-28; source msha-controller-operator-history
- **controller_controls_operator:** Florida Progress Corporation → Diamond May Coal Company Inc; 1989-08-01 to 1991-02-28; source msha-controller-operator-history
- **operator_operates_mine:** Adena Processing Inc → Pioneer Preparation Plant; 1991-03-01 to 1992-08-31; source msha-controller-operator-history
- **controller_controls_mine:** Charles E  Yates → Pioneer Preparation Plant; 1991-03-01 to 1992-08-31; source msha-controller-operator-history
- **controller_controls_operator:** Charles E  Yates → Adena Processing Inc; 1991-03-01 to 1992-08-31; source msha-controller-operator-history
- **operator_operates_mine:** Diamond May Coal Company Inc → Pioneer Preparation Plant; 1992-09-01 to 2000-11-29; source msha-controller-operator-history
- **controller_controls_operator:** Florida Progress Corporation → Diamond May Coal Company Inc; 1992-09-01 to 2000-11-29; source msha-controller-operator-history
- **operator_operates_mine:** Diamond May Coal Co Inc → Pioneer Preparation Plant; 2000-11-30 to 2006-05-04; source msha-controller-operator-history
- **controller_controls_mine:** David  Wells → Pioneer Preparation Plant; 2001-05-01 to 2008-09-11; source msha-controller-operator-history
- **controller_controls_mine:** Progress Energy Inc → Pioneer Preparation Plant; 2002-01-28 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Progress Energy Inc → Diamond May Coal Co Inc; 2002-01-28 to 2006-05-04; source msha-controller-operator-history
- **controller_controls_mine:** Amfire LLC → Pioneer Preparation Plant; 2003-01-31 to 2003-01-31; source msha-controller-operator-history
- **controller_controls_mine:** Alpha Natural Resources, Inc. → Pioneer Preparation Plant; 2003-02-01 to 2016-07-25; source msha-controller-operator-history
- **operator_operates_mine:** Enterprise Mining Company LLC → Pioneer Preparation Plant; 2006-05-05 to 2014-12-17; source msha-controller-operator-history
- **controller_controls_operator:** Alpha Natural Resources, Inc. → Enterprise Mining Company LLC; 2006-05-05 to 2014-12-17; source msha-controller-operator-history
- **controller_controls_operator:** Amfire LLC → Enterprise Mining Company LLC; 2006-05-05 to 2003-01-31; source msha-controller-operator-history
- **controller_controls_mine:** Lipari Energy → Pioneer Preparation Plant; 2008-09-12 to current/open; source msha-controller-operator-history
- **operator_operates_mine:** B&W Resources Inc. → Pioneer Preparation Plant; 2014-12-18 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Lipari Energy → B&W Resources Inc.; 2014-12-18 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** David  Wells → B&W Resources Inc.; 2014-12-18 to 2008-09-11; source msha-controller-operator-history
- **controller_controls_mine:** Alpha Natural Resources Holdings, Inc → Pioneer Preparation Plant; 2016-07-26 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Alpha Natural Resources Holdings, Inc → Enterprise Mining Company LLC; 2016-07-26 to 2014-12-17; source msha-controller-operator-history