# Relationship history for MSHA mine 0600760

Current hierarchy: **Harold B  Hopkins → French River Materials of Thompson, LLC → French River Materials**

- 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:** French River Materials of Thompson, LLC → French River Materials; 2010-01-04 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Harold B  Hopkins et al → French River Materials; 2010-01-04 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Harold B  Hopkins et al → French River Materials of Thompson, LLC; 2010-01-04 to current/open; source msha-controller-operator-history