# Relationship history for MSHA mine 1202381

Current hierarchy: **Donald W.  Bottamiller → Bottamiller Enterprises, Inc. → Power 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:** Bottamiller Enterprises, Inc. → Power Screen; 2005-10-03 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Donald W.  Bottamiller → Power Screen; 2005-10-03 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Donald W.  Bottamiller → Bottamiller Enterprises, Inc.; 2005-10-03 to current/open; source msha-controller-operator-history