# Relationship history for MSHA mine 0101937

Current hierarchy: **Great Northern Nekoosa Inc → Brilliant Coal Company Inc → W2000 Erection Site Surface**

- 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:** Great Northern Nekoosa Inc → W2000 Erection Site Surface; 1950-01-01 to current/open; source msha-controller-operator-history
- **operator_operates_mine:** Brilliant Coal Company Inc → W2000 Erection Site Surface; 1978-09-01 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Great Northern Nekoosa Inc → Brilliant Coal Company Inc; 1978-09-01 to current/open; source msha-controller-operator-history