# Relationship history for MSHA mine 0600698

Current hierarchy: **Richard  Dalling → Stratford Rock, LLC → Stratford Rock**

- 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:** Stratford Rock, LLC → Stratford Rock; 2002-01-17 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Richard  Dalling et al → Stratford Rock; 2002-01-17 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Richard  Dalling et al → Stratford Rock, LLC; 2002-01-17 to current/open; source msha-controller-operator-history