# Relationship history for MSHA mine 3002622

Current hierarchy: **William C  Parr → W C P CONSTRUCTION CORP → PARR'S SHALE BANK**

- 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:** W C P Construction Corp → PARR'S SHALE BANK; 1981-09-01 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** William C  Parr → PARR'S SHALE BANK; 1981-09-01 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** William C  Parr → W C P Construction Corp; 1981-09-01 to current/open; source msha-controller-operator-history