# Relationship history for MSHA mine 0405322

Current hierarchy: **Brian M  Oaks → Alpha Materials, Inc. → Alpha Materials, 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: 2026-10-13T11:19:05.459773+00:00

## Valid-time edges

- **operator_operates_mine:** Bi-Rite Redi-Mix Concrete Corp → Alpha Materials, Inc.; 1997-08-01 to 1999-10-05; source msha-controller-operator-history
- **controller_controls_mine:** Donald M  Oaks → Alpha Materials, Inc.; 1997-08-01 to 1999-10-05; source msha-controller-operator-history
- **controller_controls_operator:** Donald M  Oaks → Bi-Rite Redi-Mix Concrete Corp; 1997-08-01 to 1999-10-05; source msha-controller-operator-history
- **operator_operates_mine:** Solomon Rock & Sand Inc → Alpha Materials, Inc.; 1999-10-06 to 2004-01-21; source msha-controller-operator-history
- **controller_controls_mine:** Showalter Clifford → Alpha Materials, Inc.; 1999-10-06 to 2001-10-23; source msha-controller-operator-history
- **controller_controls_operator:** Showalter Clifford → Solomon Rock & Sand Inc; 1999-10-06 to 2001-10-23; source msha-controller-operator-history
- **controller_controls_mine:** Brian M  Oaks → Alpha Materials, Inc.; 2001-10-24 to 2004-01-21; source msha-controller-operator-history
- **controller_controls_operator:** Brian M  Oaks → Solomon Rock & Sand Inc; 2001-10-24 to 2004-01-21; source msha-controller-operator-history
- **operator_operates_mine:** Alpha Materials, Inc. → Alpha Materials, Inc.; 2004-01-22 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Brian M  Oaks → Alpha Materials, Inc.; 2004-01-22 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Brian M  Oaks → Alpha Materials, Inc.; 2004-01-22 to current/open; source msha-controller-operator-history