# Relationship history for MSHA mine 2100566

Current hierarchy: **Jason  Sing → Meeker Washed Sand & Gravel → Meeker Washed 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: 2026-10-18T09:31:49.615908+00:00

## Valid-time edges

- **operator_operates_mine:** Meeker Washed Sand & Gravel Inc → Meeker Washed Sand & Gravel, Inc.; 1950-01-01 to 2002-03-31; source msha-controller-operator-history
- **controller_controls_mine:** Neil  Sing → Meeker Washed Sand & Gravel, Inc.; 1950-01-01 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Neil  Sing → Meeker Washed Sand & Gravel Inc; 1950-01-01 to 2002-03-31; source msha-controller-operator-history
- **operator_operates_mine:** Meeker Washed Sand & Gravel → Meeker Washed Sand & Gravel, Inc.; 2002-04-01 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Jason  Sing → Meeker Washed Sand & Gravel, Inc.; 2002-04-01 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Jason  Sing → Meeker Washed Sand & Gravel; 2002-04-01 to current/open; source msha-controller-operator-history