# Relationship history for MSHA mine 3609487

Current hierarchy: **Nancy L  Lindenmuth → White Pine Coal Co., Inc. → Red Oak Too**

- Valid-time bounds: inclusive, date granularity
- Null end: open-ended in the upstream history row; not independent proof of present control
- Transaction-time observation: 2026-10-18T09:31:49.615908+00:00

## Valid-time edges

- **controller_controls_mine:** Nancy L  Lindenmuth → Red Oak Too; 1984-03-01 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Wally T  Fetterolf → Red Oak Too; 2001-03-01 to current/open; source msha-controller-operator-history
- **operator_operates_mine:** W. T. Fetterolf Coal Co. → Red Oak Too; 2007-01-04 to 2008-08-17; source msha-controller-operator-history
- **controller_controls_operator:** Wally T  Fetterolf → W. T. Fetterolf Coal Co.; 2007-01-04 to 2008-08-17; source msha-controller-operator-history
- **operator_operates_mine:** White Pine Coal Co., Inc. → Red Oak Too; 2008-08-18 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Nancy L  Lindenmuth → White Pine Coal Co., Inc.; 2008-08-18 to current/open; source msha-controller-operator-history