# Relationship history for MSHA mine 1401331

Current hierarchy: **Robert T Carlile → J & R Sand Company Inc → Lemert Pit And Plant**

- 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

- **controller_controls_mine:** Robert D  Carlile → Lemert Pit And Plant; 1950-01-01 to 2013-10-29; source msha-controller-operator-history
- **operator_operates_mine:** J & R Sand Company Inc → Lemert Pit And Plant; 1979-01-01 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Robert D  Carlile → J & R Sand Company Inc; 1979-01-01 to 2013-10-29; source msha-controller-operator-history
- **controller_controls_mine:** Robert T Carlile → Lemert Pit And Plant; 2013-10-30 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Robert T Carlile → J & R Sand Company Inc; 2013-10-30 to current/open; source msha-controller-operator-history