# Relationship history for MSHA mine 3000883

Current hierarchy: **John J Bryant (Trust) → G W Bryant Core Sands Inc → G W Bryant Core Sands Inc.**

- 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:** G W Bryant Core Sands Inc → G W Bryant Core Sands Inc.; 1950-01-01 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** John J Bryant (Trust)  et al → G W Bryant Core Sands Inc.; 1950-01-01 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** John J Bryant (Trust)  et al → G W Bryant Core Sands Inc; 1950-01-01 to current/open; source msha-controller-operator-history