# Relationship history for MSHA mine 4104147

Current hierarchy: **Perry Vaughn Proffitt → IMAGE MATERIALS → IMAGE MATERIALS**

- 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

- **operator_operates_mine:** Bmw Enterprises Inc → IMAGE MATERIALS; 2000-01-01 to 2000-10-08; source msha-controller-operator-history
- **controller_controls_mine:** Billy V  Threatt → IMAGE MATERIALS; 2000-01-01 to 2000-10-08; source msha-controller-operator-history
- **controller_controls_operator:** Billy V  Threatt → Bmw Enterprises Inc; 2000-01-01 to 2000-10-08; source msha-controller-operator-history
- **operator_operates_mine:** Aurora Materials Ltd → IMAGE MATERIALS; 2000-10-09 to 2005-04-30; source msha-controller-operator-history
- **controller_controls_mine:** Perry Vaughn Proffitt → IMAGE MATERIALS; 2000-10-09 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Perry Vaughn Proffitt → Aurora Materials Ltd; 2000-10-09 to 2005-04-30; source msha-controller-operator-history
- **operator_operates_mine:** IMAGE MATERIALS → IMAGE MATERIALS; 2005-05-01 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Perry Vaughn Proffitt → IMAGE MATERIALS; 2005-05-01 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Perry Vaughn Proffitt → IMAGE MATERIALS; 2005-05-01 to current/open; source msha-controller-operator-history