# Relationship history for MSHA mine 5001946

Current hierarchy: **NANA North LLC → NANA Construction LLC → NANA Construction Portable**

- 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:** Drake Construction Inc → NANA Construction Portable; 2010-09-03 to 2026-01-05; source msha-controller-operator-history
- **controller_controls_mine:** Toby W  Drake → NANA Construction Portable; 2010-09-03 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Toby W  Drake → Drake Construction Inc; 2010-09-03 to 2026-01-05; source msha-controller-operator-history
- **operator_operates_mine:** NANA Construction LLC → NANA Construction Portable; 2026-01-06 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** NANA North LLC → NANA Construction Portable; 2026-01-06 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** NANA North LLC → NANA Construction LLC; 2026-01-06 to current/open; source msha-controller-operator-history