# Relationship history for MSHA mine 1800794

Current hierarchy: **Freddie A  Taylor → ARJ Construction Company → Taylor Highwall Mine**

- 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:** Risa  Taylor → Taylor Highwall Mine; 2003-03-24 to 2006-02-23; source msha-controller-operator-history
- **controller_controls_mine:** Freddie A  Taylor → Taylor Highwall Mine; 2006-02-24 to current/open; source msha-controller-operator-history
- **operator_operates_mine:** ARJ Construction Company → Taylor Highwall Mine; 2013-12-30 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Risa  Taylor → ARJ Construction Company; 2013-12-30 to 2006-02-23; source msha-controller-operator-history
- **controller_controls_operator:** Freddie A  Taylor → ARJ Construction Company; 2013-12-30 to current/open; source msha-controller-operator-history