# Relationship history for MSHA mine 3001685

Current hierarchy: **Raymond  Demers → Nicholas F Domain Sand & Gravel → Route 22**

- 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:** Vincent Sand & Gravel Inc → Route 22; 1950-01-01 to 1993-03-21; source msha-controller-operator-history
- **controller_controls_mine:** James E  Vincent → Route 22; 1950-01-01 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** James E  Vincent → Vincent Sand & Gravel Inc; 1950-01-01 to 1993-03-21; source msha-controller-operator-history
- **controller_controls_mine:** Raymond  Demers → Route 22; 1950-01-01 to current/open; source msha-controller-operator-history
- **operator_operates_mine:** Nicholas F Domain Sand & Gravel → Route 22; 1993-03-22 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Raymond  Demers → Nicholas F Domain Sand & Gravel; 1993-03-22 to current/open; source msha-controller-operator-history