# Relationship history for MSHA mine 3608168

Current hierarchy: **Nancy L  Lindenmuth → White Pine Coal Company Inc → Ben Franklin Bank**

- 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:** Nancy L  Lindenmuth → Ben Franklin Bank; 1984-03-01 to current/open; source msha-controller-operator-history
- **operator_operates_mine:** White Pine Coal Company Inc → Ben Franklin Bank; 1990-05-01 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Nancy L  Lindenmuth → White Pine Coal Company Inc; 1990-05-01 to current/open; source msha-controller-operator-history