# Relationship history for MSHA mine 4101477

Current hierarchy: **Robert H Thompson; Cory  Thompson → Valley Caliche Products Inc → Beck Quarry**

- 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:** Valley Caliche Products Inc → Beck Quarry; 1950-01-01 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Mark G  Motheral et al → Beck Quarry; 1950-01-01 to 2017-12-31; source msha-controller-operator-history
- **controller_controls_operator:** Mark G  Motheral et al → Valley Caliche Products Inc; 1950-01-01 to 2017-12-31; source msha-controller-operator-history
- **controller_controls_operator:** Robert H  Thompson et al → Valley Caliche Products Inc; 1950-01-01 to 2017-12-31; source msha-controller-operator-history
- **controller_controls_mine:** Robert H Thompson et al → Beck Quarry; 2018-01-01 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Robert H Thompson et al → Valley Caliche Products Inc; 2018-01-01 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Cory  Thompson et al → Valley Caliche Products Inc; 2018-01-01 to current/open; source msha-controller-operator-history