# Relationship history for MSHA mine 2103581

Current hierarchy: **Jason  Sing → Meeker Washed Sand & Gravel, Inc. → Crusher**

- 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  Sing → Crusher; 2002-04-01 to current/open; source msha-controller-operator-history
- **operator_operates_mine:** Meeker Washed Sand & Gravel, Inc. → Crusher; 2007-05-10 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Jason  Sing → Meeker Washed Sand & Gravel, Inc.; 2007-05-10 to current/open; source msha-controller-operator-history