# Relationship history for MSHA mine 4202398

Current hierarchy: **DB RC Investments II LLC → BRC Wellington LLC → BRC Wellington LLC**

- 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

- **operator_operates_mine:** Covol Engineered Fuels LLC → BRC Wellington LLC; 2005-02-10 to 2013-01-15; source msha-controller-operator-history
- **controller_controls_mine:** Headwaters Inc → BRC Wellington LLC; 2005-02-10 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Headwaters Inc → Covol Engineered Fuels LLC; 2005-02-10 to 2013-01-15; source msha-controller-operator-history
- **operator_operates_mine:** BRC Wellington LLC → BRC Wellington LLC; 2013-01-16 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** DB RC Investments II LLC → BRC Wellington LLC; 2013-01-16 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** DB RC Investments II LLC → BRC Wellington LLC; 2013-01-16 to current/open; source msha-controller-operator-history