# Relationship history for MSHA mine 0504837

Current hierarchy: **Milford R  Ashworth; Melvin R  Gydesen → Rhino Mining, LLC → Little Hope Mine**

- 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:** Rhino Mining, LLC → Little Hope Mine; 2006-07-28 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Melvin R  Gydesen et al → Little Hope Mine; 2006-07-28 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Melvin R  Gydesen et al → Rhino Mining, LLC; 2006-07-28 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Milford R  Ashworth et al → Rhino Mining, LLC; 2006-07-28 to current/open; source msha-controller-operator-history