# Relationship history for MSHA mine 3004004

Current hierarchy: **Larry A  Schaefer → SCHAEFER ENTERPRISES OF DEPOSIT, INC. → ROUTE 8 QUARRY**

- 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:** Larry A  Schaefer et al → ROUTE 8 QUARRY; 2002-09-05 to current/open; source msha-controller-operator-history
- **operator_operates_mine:** Schaefer Enterprises of Deposit, Inc. → ROUTE 8 QUARRY; 2017-10-18 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Larry A  Schaefer et al → Schaefer Enterprises of Deposit, Inc.; 2017-10-18 to current/open; source msha-controller-operator-history