# Relationship history for MSHA mine 2103982

Current hierarchy: **Klae A Thompson → Thompson Gravel & Rock LLC → Thompson**

- 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 Gravel & Rock LLC → Thompson; 2020-06-29 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Klae A Thompson → Thompson; 2020-06-29 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Klae A Thompson → Thompson Gravel & Rock LLC; 2020-06-29 to current/open; source msha-controller-operator-history