# Relationship history for MSHA mine 3608710

Current hierarchy: **Waldermar T  Fetterolf Jr → Triple T Mining Company L P → Mammoth 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

- **operator_operates_mine:** Triple T Mining Company L P → Mammoth Mine; 1998-01-01 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Waldermar T  Fetterolf Jr et al → Mammoth Mine; 1998-01-01 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Waldermar T  Fetterolf Jr et al → Triple T Mining Company L P; 1998-01-01 to current/open; source msha-controller-operator-history