# Relationship history for MSHA mine 1519176

Current hierarchy: **Lipari Energy → B&W Resources, Inc. → Barger Branch Job #14**

- 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:** Randall  Wagers et al → Barger Branch Job #14; 1992-03-13 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** David  Wells → Barger Branch Job #14; 2001-05-01 to 2008-09-11; source msha-controller-operator-history
- **operator_operates_mine:** Sand Hill Coal Processing Co → Barger Branch Job #14; 2008-01-31 to 2010-04-11; source msha-controller-operator-history
- **controller_controls_operator:** Randall  Wagers et al → Sand Hill Coal Processing Co; 2008-01-31 to 2010-04-11; source msha-controller-operator-history
- **controller_controls_mine:** Lipari Energy → Barger Branch Job #14; 2008-09-12 to current/open; source msha-controller-operator-history
- **operator_operates_mine:** B&W Resources, Inc. → Barger Branch Job #14; 2010-04-12 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Lipari Energy → B&W Resources, Inc.; 2010-04-12 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** David  Wells → B&W Resources, Inc.; 2010-04-12 to 2008-09-11; source msha-controller-operator-history