# Relationship history for MSHA mine 0400035

Current hierarchy: **Janet M  Auxier → The Rock Yard - TRI, Inc. → The Rock Yard - TRI, 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:** Calico Rock Milling Inc → The Rock Yard - TRI, Inc.; 1950-01-01 to 1989-02-10; source msha-controller-operator-history
- **controller_controls_mine:** H M  Peterson → The Rock Yard - TRI, Inc.; 1950-01-01 to 1989-02-10; source msha-controller-operator-history
- **controller_controls_operator:** H M  Peterson → Calico Rock Milling Inc; 1950-01-01 to 1989-02-10; source msha-controller-operator-history
- **operator_operates_mine:** Calico Rock Milling Inc → The Rock Yard - TRI, Inc.; 1989-02-11 to 1992-12-13; source msha-controller-operator-history
- **controller_controls_mine:** Calico Holdings Corp → The Rock Yard - TRI, Inc.; 1989-02-11 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Calico Holdings Corp → Calico Rock Milling Inc; 1989-02-11 to 1992-12-13; source msha-controller-operator-history
- **operator_operates_mine:** West Coast Rock Inc → The Rock Yard - TRI, Inc.; 1992-12-14 to 2008-10-09; source msha-controller-operator-history
- **controller_controls_mine:** Carole G  Hooper → The Rock Yard - TRI, Inc.; 1992-12-14 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Carole G  Hooper → West Coast Rock Inc; 1992-12-14 to 2008-10-09; source msha-controller-operator-history
- **operator_operates_mine:** The Rock Yard - TRI, Inc. → The Rock Yard - TRI, Inc.; 2008-10-10 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Janet M  Auxier → The Rock Yard - TRI, Inc.; 2008-10-10 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Janet M  Auxier → The Rock Yard - TRI, Inc.; 2008-10-10 to current/open; source msha-controller-operator-history