# Relationship history for MSHA mine 2602501

Current hierarchy: **Desiree  Temple; Max  Maserang → M &  M Crushing and  Materials LLC → Portable #1**

- 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:** M &  M Crushing and  Materials LLC → Portable #1; 2002-08-15 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Max  Maserang et al → Portable #1; 2002-08-15 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Max  Maserang et al → M &  M Crushing and  Materials LLC; 2002-08-15 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Desiree  Temple et al → M &  M Crushing and  Materials LLC; 2002-08-15 to current/open; source msha-controller-operator-history