# Relationship history for MSHA mine 4406803

Current hierarchy: **V C  Adamson Jr → Virginia Slate Company → ADCO LAND CORP #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

- **operator_operates_mine:** Virginia Slate Company → ADCO LAND CORP #1; 1994-09-01 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** V C  Adamson Jr → ADCO LAND CORP #1; 1994-09-01 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** V C  Adamson Jr → Virginia Slate Company; 1994-09-01 to current/open; source msha-controller-operator-history