# Relationship history for MSHA mine 4300594

Current hierarchy: **Clark S  Bogie → Chief Crushing & Excavation, Inc. → Atlas Screen**

- 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:** Donald Beattie Crushing & Screening → Atlas Screen; 2003-07-16 to 2014-03-31; source msha-controller-operator-history
- **controller_controls_mine:** Donald C  Beattie → Atlas Screen; 2003-07-16 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Donald C  Beattie → Donald Beattie Crushing & Screening; 2003-07-16 to 2014-03-31; source msha-controller-operator-history
- **controller_controls_mine:** Clark S  Bogie → Atlas Screen; 2008-07-09 to current/open; source msha-controller-operator-history
- **operator_operates_mine:** Chief Crushing & Excavation, Inc. → Atlas Screen; 2014-04-01 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Clark S  Bogie → Chief Crushing & Excavation, Inc.; 2014-04-01 to current/open; source msha-controller-operator-history