# Relationship history for MSHA mine 4105334

Current hierarchy: **Shawn  Poynor; Clay  Butler; Casey  Poynor → BP Surface Solutions, LLC → Power Screen 320 #1**

- 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:** Shawn  Poynor et al → Power Screen 320 #1; 2016-06-13 to current/open; source msha-controller-operator-history
- **operator_operates_mine:** BP Surface Solutions, LLC → Power Screen 320 #1; 2018-01-24 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Shawn  Poynor et al → BP Surface Solutions, LLC; 2018-01-24 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Clay  Butler et al → BP Surface Solutions, LLC; 2018-01-24 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Casey  Poynor et al → BP Surface Solutions, LLC; 2018-01-24 to current/open; source msha-controller-operator-history