# Relationship history for MSHA mine 2501288

Current hierarchy: **Timothy L  Stalp → Stalp Gravel Inc → West Point South Plant**

- Valid-time bounds: inclusive, date granularity
- Null end: open-ended in the upstream history row; not independent proof of present control
- Transaction-time observation: 2026-10-17T05:35:58.500035+00:00

## Valid-time edges

- **controller_controls_mine:** Timothy L  Stalp → West Point South Plant; 2006-04-01 to current/open; source msha-controller-operator-history
- **operator_operates_mine:** Stalp Gravel Inc → West Point South Plant; 2013-03-27 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Timothy L  Stalp → Stalp Gravel Inc; 2013-03-27 to current/open; source msha-controller-operator-history