# Relationship history for MSHA mine 1519799

Current hierarchy: **Robin Roy Belcher → P B Dirt Movers, Inc → Fedscreek Surface**

- 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:** Robin Roy Belcher → Fedscreek Surface; 1980-01-01 to current/open; source msha-controller-operator-history
- **operator_operates_mine:** P B Dirt Movers, Inc → Fedscreek Surface; 2016-09-01 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Robin Roy Belcher → P B Dirt Movers, Inc; 2016-09-01 to current/open; source msha-controller-operator-history