# Relationship history for MSHA mine 2602335

Current hierarchy: **Daniel I Daffer → Pahrump Concrete Inc → ROCK VALLEY WASH**

- 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

- **controller_controls_mine:** Daniel I Daffer → ROCK VALLEY WASH; 1996-10-24 to current/open; source msha-controller-operator-history
- **operator_operates_mine:** Pahrump Concrete Inc → ROCK VALLEY WASH; 1997-04-01 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Daniel I Daffer → Pahrump Concrete Inc; 1997-04-01 to current/open; source msha-controller-operator-history