# Relationship history for MSHA mine 0504917

Current hierarchy: **Emir  Utush; Leah K Rivera → Colorado Chase Mining Corporation → Chase 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:** Barnhard Mining Company LLC → Chase Mine; 2008-08-18 to 2021-08-09; source msha-controller-operator-history
- **controller_controls_mine:** Albert J  Barnhard  et al → Chase Mine; 2008-08-18 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Albert J  Barnhard  et al → Barnhard Mining Company LLC; 2008-08-18 to 2021-08-09; source msha-controller-operator-history
- **operator_operates_mine:** Colorado Chase Mining Corporation → Chase Mine; 2021-08-10 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Emir  Utush et al → Chase Mine; 2021-08-10 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Emir  Utush et al → Colorado Chase Mining Corporation; 2021-08-10 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Leah K Rivera et al → Colorado Chase Mining Corporation; 2021-08-10 to current/open; source msha-controller-operator-history