# Relationship history for MSHA mine 0505139

Current hierarchy: **Paul  Danio etal; David  Emslie etal → Rocky Flats Environmental Solutions LLC → Rocky Flats Facility**

- 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:** Rocky Flats Environmental Solutions LLC → Rocky Flats Facility; 2021-07-29 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Paul  Danio etal → Rocky Flats Facility; 2021-07-29 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Paul  Danio etal → Rocky Flats Environmental Solutions LLC; 2021-07-29 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** David  Emslie etal → Rocky Flats Environmental Solutions LLC; 2021-07-29 to current/open; source msha-controller-operator-history