# Relationship history for MSHA mine 4404885

Current hierarchy: **Wise Dock Co--Jerry & G C Wharton → Moose Coal Joint Venture → No 2 Strip**

- 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

- **operator_operates_mine:** Moose Coal Joint Venture → No 2 Strip; 1977-10-01 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Wise Dock Co--Jerry & G C Wharton → No 2 Strip; 1977-10-01 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Wise Dock Co--Jerry & G C Wharton → Moose Coal Joint Venture; 1977-10-01 to current/open; source msha-controller-operator-history