# Relationship history for MSHA mine 3503971

Current hierarchy: **Scott R  Nelson → Summitt Mining LLC → Walker**

- 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:** Scott R  Nelson → Walker; 2014-10-28 to current/open; source msha-controller-operator-history
- **operator_operates_mine:** Summitt Mining LLC → Walker; 2025-01-14 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Scott R  Nelson → Summitt Mining LLC; 2025-01-14 to current/open; source msha-controller-operator-history