# Relationship history for MSHA mine 4609392

Current hierarchy: **Brandon  Nguyen → Bedrock Resources, Inc. → Bedrock No. 1**

- 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:** William F  Adams → Bedrock No. 1; 1996-03-18 to current/open; source msha-controller-operator-history
- **operator_operates_mine:** WA Mining, Inc. → Bedrock No. 1; 2011-01-18 to 2024-09-04; source msha-controller-operator-history
- **controller_controls_operator:** William F  Adams → WA Mining, Inc.; 2011-01-18 to 2024-09-04; source msha-controller-operator-history
- **operator_operates_mine:** Bedrock Resources, Inc. → Bedrock No. 1; 2024-09-05 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Brandon  Nguyen → Bedrock No. 1; 2024-09-05 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Brandon  Nguyen → Bedrock Resources, Inc.; 2024-09-05 to current/open; source msha-controller-operator-history