# Relationship history for MSHA mine 4300769

Current hierarchy: **Jason P  Sicard → KINGDOM GRAVEL & AGGREGATE, INC. → ASTEC TRACK SCREEN**

- 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:** Jason P  Sicard → ASTEC TRACK SCREEN; 2013-05-14 to current/open; source msha-controller-operator-history
- **operator_operates_mine:** Kingdom Gravel & Aggregate, Inc. → ASTEC TRACK SCREEN; 2015-07-01 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Jason P  Sicard → Kingdom Gravel & Aggregate, Inc.; 2015-07-01 to current/open; source msha-controller-operator-history