# Relationship history for MSHA mine 2002799

Current hierarchy: **Sidney  Hagen → Hagen Cement Products Inc → HAGEN CEMENT PROD. 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: 2026-10-17T05:35:58.500035+00:00

## Valid-time edges

- **operator_operates_mine:** Hagen Cement Products Inc → HAGEN CEMENT PROD. INC.; 1988-03-01 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Sidney  Hagen  et al → HAGEN CEMENT PROD. INC.; 1988-03-01 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Sidney  Hagen  et al → Hagen Cement Products Inc; 1988-03-01 to current/open; source msha-controller-operator-history