# Relationship history for MSHA mine 4103561

Current hierarchy: **Howard  Yocham → Capitol Area Resources → HANSON 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: 2026-10-13T11:19:05.459773+00:00

## Valid-time edges

- **controller_controls_mine:** Howard  Yocham → HANSON QUARRY; 1987-12-01 to current/open; source msha-controller-operator-history
- **operator_operates_mine:** Austin Cut Stone Inc → HANSON QUARRY; 1989-05-01 to 1993-07-21; source msha-controller-operator-history
- **controller_controls_operator:** Howard  Yocham → Austin Cut Stone Inc; 1989-05-01 to 1993-07-21; source msha-controller-operator-history
- **operator_operates_mine:** Capitol Area Resources → HANSON QUARRY; 1993-07-22 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Paul  Schartz → HANSON QUARRY; 1993-07-22 to 2008-12-31; source msha-controller-operator-history
- **controller_controls_operator:** Paul  Schartz → Capitol Area Resources; 1993-07-22 to 2008-12-31; source msha-controller-operator-history
- **controller_controls_mine:** Howard  Yocham → HANSON QUARRY; 2009-01-01 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Howard  Yocham → Capitol Area Resources; 2009-01-01 to current/open; source msha-controller-operator-history