# Relationship history for MSHA mine 0600765

Current hierarchy: **Patricia  Manchester; William G  Manchester → WW Manchester Construction Company Inc. → WW Manchester**

- 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:** Patricia  Manchester et al → WW Manchester; 1950-01-01 to current/open; source msha-controller-operator-history
- **operator_operates_mine:** WW Manchester Construction Company Inc. → WW Manchester; 2010-06-22 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Patricia  Manchester et al → WW Manchester Construction Company Inc.; 2010-06-22 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** William G  Manchester et al → WW Manchester Construction Company Inc.; 2010-06-22 to current/open; source msha-controller-operator-history