# Relationship history for MSHA mine 1202397

Current hierarchy: **Steve  Rickmeier → BRC Chinook LLC → BRC Chinook 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: 2026-10-13T11:19:05.459773+00:00

## Valid-time edges

- **controller_controls_mine:** Headwaters Inc → BRC Chinook LLC; 2005-02-10 to current/open; source msha-controller-operator-history
- **operator_operates_mine:** Covol Engineered Fuels → BRC Chinook LLC; 2007-03-23 to 2012-05-24; source msha-controller-operator-history
- **controller_controls_operator:** Headwaters Inc → Covol Engineered Fuels; 2007-03-23 to 2012-05-24; source msha-controller-operator-history
- **operator_operates_mine:** Covol Fuels Chinook, LLC → BRC Chinook LLC; 2012-05-25 to 2013-01-15; source msha-controller-operator-history
- **controller_controls_mine:** Headwaters Inc → BRC Chinook LLC; 2012-05-25 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Headwaters Inc → Covol Fuels Chinook, LLC; 2012-05-25 to 2013-01-15; source msha-controller-operator-history
- **operator_operates_mine:** BRC Chinook LLC → BRC Chinook LLC; 2013-01-16 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Steve  Rickmeier et al → BRC Chinook LLC; 2013-01-16 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Steve  Rickmeier et al → BRC Chinook LLC; 2013-01-16 to current/open; source msha-controller-operator-history