# Relationship history for MSHA mine 4300573

Current hierarchy: **Town Of Hyde Park-VT → TOWN OF HYDE PARK → TOWN HYDE PARK GRAVEL PIT**

- Valid-time bounds: inclusive, date granularity
- Null end: open-ended in the upstream history row; not independent proof of present control
- Transaction-time observation: 2026-10-18T09:31:49.615908+00:00

## Valid-time edges

- **controller_controls_mine:** Town Of Hyde Park-VT → TOWN HYDE PARK GRAVEL PIT; 1979-01-01 to current/open; source msha-controller-operator-history
- **operator_operates_mine:** TOWN OF HYDE PARK → TOWN HYDE PARK GRAVEL PIT; 2002-05-13 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Town Of Hyde Park-VT → TOWN OF HYDE PARK; 2002-05-13 to current/open; source msha-controller-operator-history