# Relationship history for MSHA mine 2003206

Current hierarchy: **Frank  Click → Click Sand & Gravel Inc → CLICK SAND & GRAVEL, 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:** Click Sand & Gravel Inc → CLICK SAND & GRAVEL, INC.; 2001-06-01 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Frank  Click → CLICK SAND & GRAVEL, INC.; 2001-06-01 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Frank  Click → Click Sand & Gravel Inc; 2001-06-01 to current/open; source msha-controller-operator-history