# Relationship history for MSHA mine 4202768

Current hierarchy: **Uinta Wax LLC → Wildcat Sand LLC → Echo**

- Valid-time bounds: inclusive, date granularity
- Null end: open-ended in the upstream history row; not independent proof of present control
- Transaction-time observation: 2026-10-17T05:35:58.500035+00:00

## Valid-time edges

- **controller_controls_mine:** CH4 - Finley Utah LLC → Echo; 2021-01-04 to 2021-07-26; source msha-controller-operator-history
- **controller_controls_mine:** Uinta Wax LLC → Echo; 2021-07-27 to current/open; source msha-controller-operator-history
- **operator_operates_mine:** Wildcat Sand LLC → Echo; 2024-10-01 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** CH4 - Finley Utah LLC → Wildcat Sand LLC; 2024-10-01 to 2021-07-26; source msha-controller-operator-history
- **controller_controls_operator:** Uinta Wax LLC → Wildcat Sand LLC; 2024-10-01 to current/open; source msha-controller-operator-history