# Relationship history for MSHA mine 3100083

Current hierarchy: **Franklin A  Thompson → Thompson Contractors Inc → Miller Creek Quarry And Mill**

- 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:** Thompson Contractors Inc → Miller Creek Quarry And Mill; 1950-01-01 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Lawrence  Thompson → Miller Creek Quarry And Mill; 1950-01-01 to 2012-12-31; source msha-controller-operator-history
- **controller_controls_operator:** Lawrence  Thompson → Thompson Contractors Inc; 1950-01-01 to 2012-12-31; source msha-controller-operator-history
- **controller_controls_mine:** Franklin A  Thompson → Miller Creek Quarry And Mill; 2013-01-01 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Franklin A  Thompson → Thompson Contractors Inc; 2013-01-01 to current/open; source msha-controller-operator-history