# Relationship history for MSHA mine 1700815

Current hierarchy: **Robert S  Pidacks → R. S. Pidacks, Inc → Portable Crusher #2**

- 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:** Robert S  Pidacks → Portable Crusher #2; 2000-07-01 to current/open; source msha-controller-operator-history
- **operator_operates_mine:** R. S. Pidacks, Inc → Portable Crusher #2; 2007-05-07 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Robert S  Pidacks → R. S. Pidacks, Inc; 2007-05-07 to current/open; source msha-controller-operator-history