# Relationship history for MSHA mine 4801550

Current hierarchy: **Ron  Cook; Dan  Swires → Adventure Stone Llc → ADVENTURE STONE LLC**

- 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:** Adventure Stone Llc → ADVENTURE STONE LLC; 1998-08-01 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Dan  Swires  et al → ADVENTURE STONE LLC; 1998-08-01 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Dan  Swires  et al → Adventure Stone Llc; 1998-08-01 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Ron  Cook  et al → Adventure Stone Llc; 1998-08-01 to current/open; source msha-controller-operator-history