# Relationship history for MSHA mine 3003494

Current hierarchy: **Town Of Fort Ann-Ny → Town of Fort Ann Highway Dept. → Fort Ann Highway**

- 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:** Town Of Fort Ann-Ny → Fort Ann Highway; 1993-05-01 to current/open; source msha-controller-operator-history
- **operator_operates_mine:** Town of Fort Ann Highway Dept. → Fort Ann Highway; 2005-05-10 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Town Of Fort Ann-Ny → Town of Fort Ann Highway Dept.; 2005-05-10 to current/open; source msha-controller-operator-history