# Relationship history for MSHA mine 3100420

Current hierarchy: **James K  Bryant → Stuart Concrete Inc → STONEVILLE SAND MINE**

- 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:** Fred D Mitchell & Son → STONEVILLE SAND MINE; 1950-01-01 to 2000-06-21; source msha-controller-operator-history
- **controller_controls_mine:** Fred D  Mitchell et al → STONEVILLE SAND MINE; 1950-01-01 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Fred D  Mitchell et al → Fred D Mitchell & Son; 1950-01-01 to 2000-06-21; source msha-controller-operator-history
- **controller_controls_operator:** John W  Mitchell et al → Fred D Mitchell & Son; 1950-01-01 to 2000-06-21; source msha-controller-operator-history
- **operator_operates_mine:** Stuart Concrete Inc → STONEVILLE SAND MINE; 2000-06-22 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** James K  Bryant → STONEVILLE SAND MINE; 2000-06-22 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** James K  Bryant → Stuart Concrete Inc; 2000-06-22 to current/open; source msha-controller-operator-history