# Relationship history for MSHA mine 3608201

Current hierarchy: **Nancy L  Lindenmuth → White Pine Coal Company, Inc. → Mahanoy Creek Mine**

- 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

- **controller_controls_mine:** Nancy L  Lindenmuth → Mahanoy Creek Mine; 1984-03-01 to current/open; source msha-controller-operator-history
- **operator_operates_mine:** White Pine Coal Company, Inc. → Mahanoy Creek Mine; 1990-10-01 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Nancy L  Lindenmuth → White Pine Coal Company, Inc.; 1990-10-01 to current/open; source msha-controller-operator-history