# Relationship history for MSHA mine 1102859

Current hierarchy: **Roy  Floit → Floit Sand & Gravel Company → Floit 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

- **controller_controls_mine:** Roy  Floit → Floit Mine; 1950-01-01 to current/open; source msha-controller-operator-history
- **operator_operates_mine:** Floit Sand & Gravel Company → Floit Mine; 1987-09-01 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Roy  Floit → Floit Sand & Gravel Company; 1987-09-01 to current/open; source msha-controller-operator-history