# Relationship history for MSHA mine 2402804

Current hierarchy: **Doug  Siderius; Cory  Siderius → Siderius Sand & Gravel. LLC → Lake Blain Pit**

- 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:** Siderius Sand & Gravel. LLC → Lake Blain Pit; 2024-04-09 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Cory  Siderius et al → Lake Blain Pit; 2024-04-09 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Cory  Siderius et al → Siderius Sand & Gravel. LLC; 2024-04-09 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Doug  Siderius et al → Siderius Sand & Gravel. LLC; 2024-04-09 to current/open; source msha-controller-operator-history