# Relationship history for MSHA mine 4300736

Current hierarchy: **Stan L  Martelle → STAN MARTELLE & SONS → MARTELLE & SONS**

- 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:** Stan Martelle & Sons → MARTELLE & SONS; 2011-11-30 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Stan L  Martelle → MARTELLE & SONS; 2011-11-30 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Stan L  Martelle → Stan Martelle & Sons; 2011-11-30 to current/open; source msha-controller-operator-history